Integrated Master Schedule (IMS)

How to Get the Most from Your IMS: What Makes an IMS Useful?

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How to Get the Most from Your IMS: What Makes an IMS Useful?

A major challenge with an Integrated Master Scheule (IMS) is making the most out of this powerful project management tool. Large and even not-so-large projects are required to have an IMS which adheres to the requirements of the Integrated Program Management Report (IPMR) or Integrated Program Management Data and Analysis Report (IPMDAR) Data Item Description (DID) and meets the schedule data quality checks available. But having met the DID requirements and passing the quality checks does not mean the IMS is being used to get the most information into the hands of decision makers on the project. 

The IPMR or IPMDAR DID, even though detailed and thorough, is generic. The same DID is used on a contract whether it is for an important new hardware-based system, a new software system, or some other goal. The DID misses the point that the type of product on the contract means that unique topics may be the most important. There is no focus in the DID; it is high level and comprehensive. What’s missing are the special interest or special focus schedules that can be drawn from the IMS with good coding, grouping, filtering, and sorting techniques.

Remember that the statement of work (SOW) for the project is really comprised of promises made in the various plans submitted in the proposal and updated after contract award. The System Engineering Management Plan (SEMP), the Software Development Plan (SDP), Make/Buy Plan, Procurement Plan, Test and Evaluation Management Plan (TEMP), and others all contain commitments that should be translated into actions in the IMS. There should be access to the portions of the IMS that show how these commitments will be accomplished.

Examples of Special Interest Schedules

On a new hardware-based project, key pieces of information revolve around getting designs done and into a form to plan for the procurement of the various things needed to build the end items. This information often resides in the IMS but must be pulled out into a “drawing release” schedule. That is a schedule showing the transition from design to 3-D models or drawings. Pinpointing the times and links in the IMS where design becomes actionable for procurement enables the project team and their suppliers to be prepared to execute the procurements. The teams or engineers (designers) and procurement people should be focused on the drawing release schedule with frequent, at least weekly meetings to coordinate.  

One of the serious issues I witnessed on a project was the lack of preparedness in having trained and qualified drawing checkers who could sign-off and release drawings. Because of the need for flight safety considerations, the drawing checker position could only be filled by qualified people. Instead of preparing months ahead for the wave of drawings, the waves were allowed to crash into the far-too-few checkers. What was supposed to be a short cycle became weeks long as drawings sat waiting for release.

As the transition is made from design to production, then the procurement schedule becomes another focused schedule which should show the information about what is being procured, from whom, and when it will be delivered. This information is used by the engineers, procurement, and inventory control people including receiving to understand the timing and volume of inbound items. Frequent coordination with suppliers and internal team members using this focused schedule helps to ensure a smooth process. Will the factory be ready to receive, inspect, process, and store all the inbound items?

What about software development as a special topic focus schedule? This is often needed. The project personnel must be able to quickly understand where in the cycle the software is and when releases will be made as well as what the release is needed for in the overall project. 

Think about all the other important focus areas that could exist on a project. For example, the training effort should be in a focused schedule showing the development of the training material (courseware), training aids, facilities, instructor preparation and anything else needed to execute the statement of work related to training.

Testing is possibly more complicated than training. This includes development of test plans and procedures, as well as the creation of test fixtures and tools. The preparation of test personnel capable of performing complicated tests should be in the focused schedule.

By now you get the idea. The IMS is the combination of all these schedules, the thing that coordinates between and among them. But the focused schedules are the real bread-and-butter of the schedule discipline. It is shocking to see a project where these do not exist. Maybe the managers don’t know they are needed or possibly that they are available. Maybe the schedule team did not prepare for these extractions from the IMS.

If your project does not have focused schedules and does not use them, the project is in jeopardy. These schedules should be generated and used frequently; weekly at least.  Even if the IMS itself is only undergoing a monthly update, the detailed schedules should be much more alive and part of the weekly communication between work teams on the project.

Tips and Suggestions

  • How to get started. Begin with the source documents and their authors, the SEMP, the TEMP, and so on. Make a list of the likely focused schedules that need to be drawn from the IMS. Read them and extract the information you need to build your IMS. If you are just starting the IMS, you could build individual schedules with the authors and then integrate them into the IMS. If you already have built the IMS, you can find the tasks you need and code them so they will appear on the focused schedule. Once coded, extract the focused schedule from the IMS using the applicable coding filters and verify it matches the commitments that were made in the source documents from the various authors. 
  • Hold “report court.” Rather than reading and sorting through all the various plans, schedule a project meeting with the key team members and ask them what reports and what schedules they need to do their jobs. Remind them of the commitments they made in the plans. They can bring or provide a list and description to you, and you can decide “in court” which items you can or cannot incorporate into the IMS. That can help to streamline what is included in the IMS and who is responsible for what. 
  • Create a schedule data dictionary if you haven’t already done so. This is essential to identify standard as well as project unique activity, milestone, or resource coding and how the coding is used so there is a common understanding of the content. The customer will need this information as well as when the IMS is provided as a monthly performance reporting data deliverable (see the IPMDAR Section 2.4.2.20, Data Dictionary for Native Schedule File). It is a prerequisite to ensure consistency in use as well as to establish a level of discipline throughout the IMS development and maintenance process. Ensure tasks always include the necessary coding. Ideally, you did your homework on the likely special topic schedules you need to draw from the IMS before starting to build the IMS. Otherwise you may need to determine various sorting and filter techniques to identify the tasks that require additional coding details. As noted above, once the tasks are coded, you or other project personnel will be able to extract the various special interest schedules from the IMS as needed. 

Need help?

Building a useful IMS for complex projects is not easy. Up front planning for the development of the IMS can help to identify the necessary outline codes and other coding to be able to group, filter, or sort the activities to extract the special topic or special focus details from the IMS. The IMS is an essential communication tool for everyone on the project. How the schedule is constructed and coded makes a difference. H&A scheduling subject matter experts (SMEs) have decades of experience in a variety of complex project environments and can help you avoid common pitfalls. Contact us today.

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Why Expert Planning and Scheduling Resources Matter

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Why Expert Planning and Scheduling Resources Matter

At Humphreys & Associates, conducting a requirements analysis of a contractor’s current integrated program management or earned value management (EVM) practices is one of our most frequently requested services. We are also the “911” call that contractors make when they need to quickly solve an Earned Value Management System (EVMS) compliance issue. When we reviewed our findings and observations from the past year, a common issue that stood out was the lack of sufficient scheduling expertise.

As many project managers, project control teams, and control account managers (CAMs) recognize, a well-planned and constructed schedule provides a model of when work will be performed and what resources are required to perform the work. A well-planned and constructed schedule must be realistic, challenging, and achievable, and be based on a well-thought-out execution plan. It also provides an overall view of performance to date and displays the forecast schedule for remaining work.

Equally important, a well-planned and constructed schedule becomes the principal communication tool for the project team. It shows when major events are planned to occur as well as the completion dates for all activities preceding them along with the resources required to support the scheduled activities. Ensuring resources are available to execute the schedule and performing a schedule risk assessment (SRA) also help to ensure the schedule is realistic and achievable.

A well-constructed and maintained schedule facilitates project performance analysis and to assess how changes affect project objectives. It provides an early warning of potential issues for effective and timely management corrective action.

Scheduling Best Practice Guidance

Several industry and government documents discuss scheduling principles and best practices for major projects within the US Federal Government acquisition environment. Two frequently referenced documents include the National Defense Industrial Association (NDIA) Integrated Program Management Division (IPMD) Planning and Scheduling Excellence Guide (PASEG) and the Government Accountability Office (GAO) Schedule Assessment Guide: Best Practices for Project Schedules. These guides define what is considered a “good schedule.”

Some of our recent blogs have highlighted the nuances of producing a well-constructed integrated master schedule (IMS) that reflects the work to be performed and communicates that plan to everyone on the project. This includes Improving Integrated Master Schedule (IMS) Task Duration Estimates, Including Level of Effort (LOE) in the Integrated Master Schedule (IMS), and Establishing Milestones in the Integrated Master Schedule (IMS) Appropriately.

What’s the Problem?

A project’s integrated master schedule (IMS) is only as good as the team that built it and the master planner/scheduler that assembled it. Scheduling is a combination of art, science, and discipline. A master planner/scheduler ensures there is clear communication on what needs to be done when along with defining how to handle day-to-day issues. They translate all of the inputs and organize the puzzle pieces into a coherent road map for the entire project team to understand and to use. The experience and schedule maturity level of the planner/scheduler is a key ingredient.

When our earned value consultants identify issues with the construction or content of an IMS, a common discovery was that the client’s scheduling team needed help with basic scheduling techniques.

Here is a sample of common findings in the past year where the client’s scheduling team and/or the master planner/scheduler, could not provide satisfactory answers to schedules under review. They needed more mature scheduling expertise.

  • Invalid critical path. The team could not display the critical path from “time now” through the end of the project. When asked to push an activity on the critical path by 300 days, they could not explain why the successor activities and end date did not move by the same 300 days.
  • Lacked awareness of the scope of work. During scheduling reviews, we ask the team how they know all requirements have been accounted for in the IMS. A common response is they rely on the individual CAMs to identify their scope of work requirements. In many instances, the entire team did not read the required contractual documents such as the statement of work, systems engineering management plan, CDRL requirements (DIDs), or the program management plan that affects them. Some did not understand the work breakdown structure (WBS) or the purpose of the WBS and how important it is for integration with the cost tool.
  • Improper baseline management. We have found that team members and/or the planner/scheduler simply insert the new baseline dates instead of updating the baseline task by task. A separate baseline IMS file should be maintained monthly and approved baseline changes should be incorporated into the revised baseline IMS, and then updated in the current IMS file.
  • Change management was lacking. The team could not explain or identify the changes incorporated into the IMS. Many planners/schedulers do not realize they are the “historians” for the project. The planner/scheduler should understand the impact of every change order or delay on the schedule. A big part of this is documenting who (customer or project team) caused the delay or whether it was caused by both parties. All changes during a reporting period should be assessed for delays and documented in the monthly schedule status report. If a change order causes a delay, it must be documented in the monthly report. Why is this important? Project records should document what and who caused the delay.
  • Ah-hoc integration of major procurement items and subcontract management. Without a documented approach for how material is incorporated into the IMS, it can be a daunting task to identify impacts when delays occur. The planner/scheduler should understand how purchase order line items are structured and should include tasks for each within the IMS. For subcontracts that have EVM and IMS requirements, it is important that the subcontractor’s schedule is modeled within the IMS at the appropriate level of detail. As a result, delays can be clearly demonstrated.

Meeting the Challenge

Planning and scheduling are critical to the success of all projects. Having a strategy to develop competent planners/schedulers ensures you have the resources with the necessary creative talent, skill set, discipline, and communication skills needed to produce quality schedules. Strategies to help scheduling personnel to improve their level of expertise include:

  • Establishing a corporate training program for planners/schedulers. This could be an internal set of courses or public training courses could be leveraged as part of that training program. The goal is to ensure the planners/schedulers and other project team members have the knowledge base to successfully develop and maintain schedules for your business environment. H&A offers a range of project scheduling training workshops that can help schedulers to implement industry best practices in an EVM environment tailored to common tools such as Microsoft Project (MSP) or Primavera P6. These workshops include hands-on exercises that help the students learn how to apply what they are learning in a real-world environment.
  • Hands-on mentoring. Our clients are often aware of the limitations of their scheduling personnel particularly when it comes to incorporating more advanced scheduling techniques such as SRAs. H&A provides planning/scheduling and risk management subject matter experts (SMEs) to help clients establish a repeatable process as well as to conduct a series of hands-on workshops with the client’s project planners/schedulers. These workshops help them to gain the experience they need to routinely conduct SRAs, to use the schedule and risk tool outputs wisely, and to use that information to produce more realistic schedules.
  • Producing schedule procedures or guidance to ensure the scheduling team is following a consistent repeatable process. Consistency helps to ensure that project personnel have the necessary knowledge base to develop and maintain an IMS in an EVM environment. This includes integrating the IMS with the cost tool as well as other systems such as an M/ERP system in production environments or integrating subcontractor scheduling data.

In situations where it is necessary to bring in outside scheduling personnel to supplement a project team, it is important to verify the scheduler’s skill set and level of expertise in an EVM environment. Just because someone states they know how to use a given scheduling tool it doesn’t mean they know how to plan and schedule. The company you choose to support you matters.

H&A routinely provides expert scheduling staff augmentation services for clients that need to fill short or long term planning/scheduling resource needs. Some clients need surge support to develop a baseline schedule for a new contract award and/or to get them through the initial work definition and planning process. H&A planners/schedulers frequently help project teams to establish and execute the weekly or monthly business rhythm until the client’s project control team is ready to take over.

Another common request is for H&A master planner/scheduler hands-on expertise to resolve a variety of schedule issues. H&A planners/schedulers often provide one-on-one mentoring to client project personnel to work through perceived or identified deficiencies. This can range from helping to configure the scheduling tool appropriately, teaching how to use the software effectively, and showing how to fix schedule construction issues as well as establishing a disciplined process that improves the quality of the schedule.

We know the planning/scheduling resources we provide to clients have the necessary level of planning, scheduling, and EVM expertise. The people we hire are required to complete a scheduling exam to verify their knowledge level; they are also known resources that other H&A consultants have worked with.

Interested in learning more? 

Whether you need training, hands-on mentoring, or staff augmentation, H&A has the support services and solutions to fit your needs. Call us today at (714) 685-1730 to get started.

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Establishing Milestones in the Integrated Master Schedule (IMS) Appropriately

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The purpose of the Integrated Master Schedule (IMS) is to model and communicate the plan to accomplish a project’s objectives. A key part of that model is the identification of key events that are represented as milestones. The selection of these milestones should be done with consideration for its purpose – what does the milestone represent and communicate? You should be aware of the intent of each milestone that is entered into the IMS. The IMS is a critical communication tool to ensure everyone on the project has a common understanding of the project’s work flow. Too many times I have witnessed a scheduler slam a milestone into the IMS without regard to how it impacts the schedule logic. This could be due to haste but, in my experience, it is often due to a lack of understanding of the purpose of the milestone.

Figure 1 illustrates a common diagram for a milestone. 

Gate Review Milestone. C may not proceed until the Gate Review has been completed.
Figure 1 Example of a Gate Milestone

As illustrated in Figure 1, the milestone is a gate and will hold up work in task C until the milestone is claimed as finished.

If the intent is to have the milestone act as an indicator instead of a gate, then the diagram in Figure 2 could satisfy that intent. If a successor is needed for the indicator milestone, something like the “End of Project” milestone could be added.

Indicator Milestone - C may proceed as soon as A is completed. Until the Milestone is claimed finished, it will move along with the data date leaving its baseline behind and indicating it has not been claimed.
Figure 2 Example of an Indicator Milestone

An accomplished scheduler knows the dangers of a Merge in the IMS. The Merge introduces schedule risk. Imagine the damage to the schedule risk assessment (SRA) if a Merge were entered as illustrated in Figure 3.

MERGE in the IMS - Neither C no D may proceed until the Gate Review has been completed. Does C really depend on B or does D really depend on A?
Figure 3 Example of Merge Risk in the IMS

In addition to adding risk, as the question indicates in Figure 3, the situation portrayed may not be true.

Is the purpose of a milestone clear to everyone?

What is the real purpose of the milestone? That must be defined first so the diagram can be entered properly into the schedule, and the IMS can model the correct steps for the project. Along with the definition of the purpose, the completion criteria should be defined and documented.

Unfortunately, this problem often extends to others on the project and even to those most responsible for the project – the Program/Project Managers (PMs). A case in point. Some years ago, a high-level customer PM challenged me, in my role as the contractor IMS architect, after the PM’s schedule subject matter expert (SME) expressed their concern that milestones in the IMS were being input incorrectly.

The milestone in dispute was the Preliminary Design Review (PDR). The PM and the PM’s schedule SME said the review was a gate and therefore should be modeled as illustrated in Figure 4. Note: In the real schedule, there were many more predecessors and successors to the milestone. Figure 4 simplifies the schedule content for clarity.

MERGE in the IMS - Neither C nor D may proceed until the Gate Review has been completed. Does C really depend on B or does D really depend on A?
Figure 4 Impact of a Gate Review Milestone

They both agreed that Tasks A and B were tasks to be done during the review itself and that the Milestone was to represent the satisfactory completion of the review. According to the definition of the PDR in the Integrated Master Plan (IMP) entrance/exit criteria, the review would lead to a letter of acceptance. The letter of acceptance was the definition of done in this case. When asked how long it would take from the time the review in A and B (and all predecessors) would be held until the letter was received, the answer was something in the order of weeks.

A literal reading of the IMS would go like this: “Hold the review in tasks A and B (and all predecessors) then wait for the approval letter before starting any other work.”

When asked if it was the PM’s intent for the several hundred engineers and others working on the project to put down their pencils after the review and wait for the letter while doing nothing as shown in PM’s desired version of the milestone in the IMS, the immediate reaction of the PM was shocked silence. Of course not. The project could not go on hold for even one week waiting for a letter. The teams would disband, and the workforce would be gone. Work would stop.

I then told the PM it was not the contractor’s intention to go parade rest and wait for the letter even if he had thought that was what was supposed to happen. If the review in A and B was deemed successful with some reasonable set of action items, then the teams would proceed. It might be that they would proceed on risk, but they would proceed anyway. I then showed the PM and the PM’s schedule SME how we would model the review in the IMS to show proceeding on risk. It would look like the example in Figure 5 if we implemented the milestone as an indicator milestone.

Review as Indicator Milestone - C and D may proceed when their respective predecessor is completed. The milestone is not a gate.
Figure 5 Review as an Indicator Milestone

The PM thought that could work but was concerned there was no gate review aspect to this diagram and PM control of the project would be weakened or lost. I then showed him how we could put the review into the IMS as an indicator with a delayed gate effect. In other words, work would proceed while the letter was being prepared but would stop at some point if the letter was not received. That diagram looked like the example in Figure 6. 

Review as Indicator Milestone but also a Gate - C and D may proceed on risk when their respective predecessor is completed. E and F however may not proceed until their immediate predecessor (C or D) and the Gate Milestone are finished.
Figure 6 Review as Indicator and as a Gate

The letter could be prepared while the teams worked on tasks C and D. If issues arose then the teams would be compelled to stop after tasks C and D individually. In this case an issue with task C might not hold up task D and conversely, an issue with task D might not hold up task C. This was a measure of control the PM thought would be adequate when the need for the approval letter in the milestone was also added.

Talking Through the IMS to Verify the Intent of Milestones

The point is that the IMS is a model of the project that should define exactly what is supposed to happen. What exactly is the IMS telling us to do? Is the review a gate? Is it just an indicator? What do the documents and agreements say about the milestone? This is definitely not the time to quickly slam a milestone into the schedule logic without taking the time to think about its purpose or what you want to communicate to someone else on the project.

This story also highlights the importance of ‘reading’ or ‘talking through’ the IMS. When it was explicitly stated that the project would be put on hold if the schedule depicted in Figure 4 were followed, the team quickly realized the need for a better approach, leading to the development of a more effective plan.

Interested in Learning More?

There is an art and skill that is honed over time for creating integrated master schedules that accurately reflect the work to be performed and clearly communicates that plan to everyone on the project. There is always more to learn. H&A offers basic and advanced scheduling workshops taught by senior master schedulers with decades of experiences in all types of scheduling environments that can be tailored for the scheduling tools you are using. Give us a call today to get started.

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Including Level of Effort (LOE) in the Integrated Master Schedule (IMS)

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A recent H&A blog titled “Level of Effort (LOE) Best Practice Tips” discussed different approaches for handling LOE to avoid generating false variances. That discussion did not elaborate on including the LOE tasks in the integrated master schedule (IMS). This blog is a follow on to that earlier discussion with a focus on options for including LOE in the IMS along with notes on best practices, tips, and customer expectations.

In the general sense of an earned value management system (EVMS), the LOE scope of work is contained in summary level planning packages (SLPPs) or control accounts as subordinate planning packages or work packages. The budget values for those elements will most likely come from a resource loaded IMS or a resource loading mechanism aligned with the IMS. Not all organizations resource load the IMS activities but instead extract time buckets from the IMS for resource loading using other mechanisms. Resource loading the IMS activities is the recommended practice because it assures cost/schedule integration, but it can be difficult.

LOE work might not appear in the IMS since it is considered optional by some customers such as the Department of Defense (DoD). The Department of Energy (DOE) requires LOE tasks to be included so you can expect it to be in the IMS when DOE is the customer.

Before we talk about LOE in the IMS we must think about the type of work the LOE tasks represent. LOE might be a general task such as “Control Account Management” that is not directly related to other work except perhaps in the time frame in which they happen. But some LOE tasks such as support tasks are related to other discrete work. Modeling the LOE in the IMS starts by understanding what type of effort is involved and can help to determine the approach for linking activities. 

LOE Best Practice Tips Related to the IMS

The Level of Effort (LOE) Best Practice Tips blog included these points related to the IMS:

  • “When LOE activities are included in the schedule, they should not drive the date calculations of discrete activities in the integrated master schedule (IMS). They should also not appear on the critical path.”
  • “LOE must be segregated from discrete work effort. In practice, this means a work package can only be assigned a single earned value method.”
  • “Consider shorter durations for the LOE when that LOE is supporting discrete effort. Should the first occurrence of the LOE trigger a data anomaly test metric, it can be proactively handled along with any future replanning. The remaining LOE would already be in one or more separate work packages so there won’t be any criticism for changing open work packages.”

Government Agency and Industry Guidance on LOE on the IMS

Is there any guidance that can help clarify how best to handle LOE tasks in the IMS? Let’s take a look at three of the guidance documents that may be useful for your environment.

  1. The Integrated Program Management Data and Analysis Report (IPMDAR) Data Item Description (DID), DI-MGMT-81861C (August 2021). This DID is typically placed on contracts with the DoD or NASA that exceed the contract value threshold for EVM reporting or EVMS compliance. Relevant mentions of the data requirements for the IMS in the DID are as follows.

“2.4.1.1 Content. The Schedule consists of horizontally and vertically integrated discrete tasks/activities, consistent with all authorized work, and relationships necessary for successful contract completion.”

Note: This is where the option to exclude LOE from the IMS appears since this requires only discrete tasks/activities. The following sections provide additional guidance when LOE is included in the IMS.

“2.4.2.7 Level of Effort (LOE) Identification. If tasks/activities within an LOE work package are included in the Schedule, clearly identify them.”

“2.4.2.9 Earned Value Technique (EVT). Identify the EVT (e.g., apportioned effort, level of effort, milestone).”

  1. National Defense Industrial Association (NDIA) Integrated Program Management Division (IPMD) Planning and Scheduling Excellence Guide (PASEG) (Version 5.0). The PASEG is a widely recognized industry guide on scheduling best practices in government contracting environments. Section 5.8, Level of Effort (LOE) provides a discussion on the topic including things to promote and things to avoid. Excerpts from the PAGEG follow.

“There are pros and cons around including or excluding LOE tasks in the IMS. Including LOE tasks in the IMS allows for a more inclusive total program look at resource distribution, which aids in the maintenance and analysis of program resource distribution. However, if modeled incorrectly, including LOE tasking in the IMS can cause inaccurate total float and critical path calculations.”

“Tasks planned as LOE in the IMS should be easily and accurately identifiable. This includes populating the appropriate Earned Value Technique field (as applicable) and possibly even identifying the task as LOE in the task description.”

“Consider adding an LOE Completion Milestone to tie all LOE tasking to the end of the program.”

“LOE tasks should not be networked so that they impact discrete tasks. Incorrect logic application on LOE can lead to invalid impacts to the program critical path.”

“Level of Effort tasks should have no discrete successors and should therefore never appear on critical/driving paths.”

  1. DOE Guide 413.3-24 Planning and Scheduling (April 2022). This document provides guidance for acceptable practices in a DOE contractual environment. The discussion on LOE can be found in Section 7 Planning and Scheduling Special Topics, 7.2 Level of Effort, and 7.3 Inclusion of Level of Effort in the Integrated Master Schedule. Excerpts and image from the Guide follow. 

“Overview: Activity-based methods either cannot, or impracticably can measure the performance of LOE WPs and activities. Include all activities, both discrete and LOE, in the IMS.”

“LOE is planned in the IMS so that it does not impact discrete work. Figure 6 shows the recommended linkages in the IMS for planning level of effort.”

Interpreting this DOE Guide diagram for the recommended modeling of LOE in the IMS, notice the inclusion of a “LOE Complete” milestone following the Critical Decision (CD) 4 milestone with no constraint. CD4 in this diagram represents the end of contract effort. The purpose of this LOE-complete milestone, with no constraint, is to provide a successor for all LOE tasks where one is needed. That will prevent generating issues where tasks have no successors.

This recommended modeling is done so that the LOE tasks are not linked to the end of the contract work and thus will not push it. The LOE tasks will also not appear on the critical path since they are not in the path that established the end date.

Also note that the LOE tasks in green are linked as successors to discrete work which is a logic linking approach intended to keep the LOE work aligned with the discrete work but off the critical path. Study the logic and you see that a movement to the right of a discrete task will drag along its related LOE task.

DOE requires the use of Primavera schedule tools so the relationships shown here can be accomplished in that tool. That may not be true of all tools. Know how your tools work before you generate any guidance.

Additional Relevant Guidance Search

H&A earned value consultants recently conducted a survey of the various government and non-government documents regarding the IMS and collected relevant guidance related to LOE among other things. The table below lists the results from a search for “LOE” wording. Note: this is a representative sample of typical government agency and industry IMS references. You should verify current references before you generate your own internal IMS guidance.

Source DocumentGuidance for Capturing all Activities, LOE in IMS
DCMA EVMS Compliance Metrics (DECM) Checks (version 6.0)
  • 06A210a: Do LOE tasks/activities have discrete successors? (0% threshold)
  • 12A101a: Are the contractor’s Level of Effort (LOE) WPs supportive in nature and/or do not produce technical content leading to an end item or product? (≤ 15% threshold)
  • 12A301a: Does the time-phasing of LOE WP budgets properly reflect when the work will be accomplished? (≤ 10% threshold)
IPMDAR DID DI-MGMT 81816CIf tasks/activities within an LOE work package are included in the Schedule, clearly identify them.
DOE Guide 413.3-24 Planning and Scheduling, Appendix A Schedule Assessment PrinciplesPrinciple 20. No LOE on critical path.
GAO Schedule Assessment Guide: Best Practices for Project Schedules (December 2015)Selected excerpts:
  • LOE activities should be clearly marked in the schedule and should never appear on a critical path.
  • LOE activities … derive their durations from other discrete work.
  • Best Practices for confirming the critical path is valid: Does not include LOE activities, summary activities, or other unusually long activities, except for future planning packages.
NDIA IPMD PASEG (version 5.0) (as noted above)
  • Tasks planned as LOE in the IMS should be easily and accurately identifiable.
  • LOE tasks should not be networked so that they impact discrete tasks.
  • Level of effort tasks should have no discrete successors and should therefore never appear on critical/driving paths.
PMI Practice Standard for Scheduling (Second Edition)Since an LOE activity is not itself a work item directly associated with accomplishing the final project product, service, or results, but rather one that supports such work, its duration is based on the duration of the discrete work activities that it is supporting.

Conclusion

Based on the various sources of guidance, it is possible to structure the IMS to include LOE in a way that provides cost/schedule integration and keeps all work correctly aligned yet does not cause issues with the critical path and the driving paths. From this guidance, it should be a straightforward effort to generate your own internal scheduling procedure defining how to handle LOE in the IMS if you choose to include it or if you are required to include it.

Need help producing a clear and concise scheduling procedure or tool specific work instructions? H&A earned value consultants and scheduling subject matter experts have worked with numerous clients to create easy to follow guides that help to ensure schedulers are following your company’s best practices using the scheduling tools of choice. Call us today at (714) 685-1730 to get started. 

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Improving Integrated Master Schedule (IMS) Task Duration Estimates

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Improving Integrated Master Schedule (IMS) Task Duration Estimates

One of the top reasons projects fail is because of poor task duration estimating for an integrated master schedule (IMS). Without accurate and consistent estimates, project outcomes can become unpredictable, leading to missed deadlines, budget overruns, and overall project failure. A realistic schedule is required to place the necessary resources in the correct timeframe to adequately budget the work as well as to produce credible estimates to complete and to forecast completion dates. While missed deadlines and budget overruns are detrimental for any project, there can be additional business ramifications when producing schedules in an Earned Value Management System (EVMS) contractual environment.

While there are effective methods available to improve task duration estimates, they are often underutilized. A common reason for this oversight is the lack of time allocated to developing the project schedule and determining task durations.

During the proposal phase, initial durations are typically estimated at a more summary level than the detailed execution phase. The proposed work is often defined at a level one to two steps higher than where the actual tasks will be performed. After project initiation, the team’s initial effort is to break the work down into more manageable tasks. This decomposition is crucial for achieving more accurate estimates. It’s no surprise, then, that the initial breakdown efforts often result in duration estimates that don’t align with the proposed durations.

Parkinson’s Law tells us that work expands to fill the time available. If task durations are excessively long, costs will inevitably rise. To counter this, it’s important to require estimators to provide both the estimated effort and the duration needed to accomplish the task. This approach helps to gain a better understanding of the scope of the task and to avoid unrealistic estimates. If you see a task that requires 10,000 hours with a duration of 2 weeks, then you immediately would suspect something is wrong with the estimates.

Techniques for Developing More Accurate Task Duration Estimates

What are your options? H&A earned value consultants and senior master schedulers often employ the following techniques to help a client produce a more realistic IMS.

  1. Establish a Probability Goal. It is essential to set clear expectations for the estimating team. Without guidance, teams may default to estimates with a 50/50 probability of success, which is a recipe for failure. Instead, directing the team to aim for estimates within a 75% to 80% probability range can lead to better outcomes.
  2. Break Down Tasks. Decompose tasks into smaller, more manageable components. The further out the task’s horizon, the greater the variability in estimates. For example, asking someone to estimate the drive time from Washington, DC, to Boston without specifying the vehicle, route, limitations, or conditions introduces unnecessary uncertainty.
  3. Use Professional Judgment. Engage someone with experience in the specific type of work required for the task. A seasoned expert will provide more accurate duration estimates based on their knowledge and experience. Often, we ask the potential task manager to do the estimate, but that person may not be the one with the most related experience or knowledge about the work.
  4. Leverage Historical Data. If the task or a similar one has been done before, use that historical data to inform the estimate. This approach provides a realistic benchmark for future estimates.
  5. Use generative AI. If you have access to an AI capability along with access to historical data, that could be an option to leverage the source data using specific prompts to glean relevant information. As with all AI tools, always verify the generated results to ensure it is a useful basis to substantiate the estimate.
  6. Apply Parametric Estimating. When possible, use parametric analysis to estimate the durations. For example, if it took a specific number of days to clean up a certain amount of toxic waste under similar conditions, this data can be used to estimate the duration of a new but comparable task.
  7. Engage Multiple Estimators. Gathering estimates from more than one person helps to reduce individual biases and provides a more rounded estimate.
  8. Apply the Delphi Method. This technique involves three knowledgeable individuals providing estimates or three-point estimates. The initial estimates are analyzed, and the results are shared with the estimators without attributing specific values to any individual. After discussing the findings, the estimators revise their estimates based on the collective insights, leading to a more refined and accurate duration estimate.
  9. Use Three-Point Estimates. Ask estimators to provide best-case (BC), most likely (ML), and worst-case (WC) durations, along with their reasoning. Applying a formula like the Program Evaluation and Review Technique (PERT) duration formula (1BC+4ML+1WC)/6 can yield an adjusted and realistic estimate. You can vary the best and worst case estimate for risk if you have information on that.

    To see how this simple approach can work, walk through this exercise. Ask yourself how long it takes you to drive to work most of the time. Let’s say the answer is 45 minutes. Then ask yourself how long it would take on a Sunday morning in the summer when the roads were dry (the best case). Let’s say your answer is 25 minutes. Then ask yourself how long it would take on a Monday morning in the winter during a moderate snow event (the worst case). You tell yourself 90 minutes. Now you have enough information to calculate the PERT duration.

    Best Case = 25 minutes
    Most likely = 45 minutes
    Worst Case = 90 minutes
    PERT Duration = (25 + 180 + 90)/6 = 49 minutes

    Finally, let’s say you ask yourself how likely it is that you end up on the high side instead of the low side. If your answer is it is much more likely to encounter conditions that slow you down, you would modify the formula to use one and a half times the worst case (25 + 180 + 135)/6 = 57 minutes. That longer duration shows the impact of your impromptu risk analysis and provides a duration that has a much higher probability of being achievable.

    Now think about the same scenario but conducted by you interviewing three people who drive the same route to work. That would approximate the Delphi method.
  1. All or something less. It may not be necessary to analyze every task to the degree suggested. Even if you could do the analysis along the top several critical paths that would be an improvement. If you were to apply numerical factors to the tasks in related portions of the project that would be impactful. For example, all mechanical design tasks or all software development tasks.

What is the best approach?

You will need to analyze your project and determine which approach or approaches would yield useful information at a reasonable cost. If you apply your own thinking on how to improve your duration estimates, you will undoubtedly find a method most suitable for your situation. Depending on a project’s complexity and risk factors, you may also find it useful to take a more formal approach. Conducting a schedule risk assessment (SRA), a probabilistic assessment of a project’s outcome, can help you gain a better understanding of where the duration risk exists in the schedule.

H&A earned value consultants and scheduling subject matter experts often assist clients to establish basic guidance to help scheduling personnel to get into the habit of adequately defining tasks and using techniques to improve duration estimates. This is critical to be able to produce well-constructed and executable schedules to improve the likelihood of achieving project technical, schedule, and cost objectives.

H&A offers a range of project scheduling training workshops that can help schedulers to implement industry best practices. These workshops also cover how to take the next step to implement advanced scheduling techniques such as schedule risk assessments to ensure the schedule is realistic and achievable. H&A earned value consultants and master schedulers often provide one-on-one mentoring using the scheduling tool of choice to help scheduling personnel work through the learning curve of using advanced network scheduling techniques to produce executable schedules.  

Call us today at (714) 685-1730 to get started.

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EVM Consulting – Modeling & Simulation

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Fighter Jet Air Plain Flying in Front of Moon

Forewarned is Forearmed

Forewarned is forearmed. John Farmer, of New Hampshire, said that in a letter in 1685. But that advice is most likely biblical and very much older. No matter the source of the thought, we should take it as divine guidance if we are project managers. Maybe we should have it cut into a stone tablet, so we can share it with our team members.

Most of our work as project managers is spent in the “controlling” phase which is made up of the three steps “measure, analyze, act.” Our EVMS and IMS exist to be able to support this management function. The measuring part is done very well in our EVMS and our IMS; we know where we are and how we got there. The analyzing is equally well handled in the IMS and EVMS. Only the management task of acting is not well supported. Generally, we lack decision making support and tools.

EVM Consulting - Measure, Analyze, Act

Deterministic Path

No matter how well constructed and how healthy our IMS is, it has a deterministic path forward. The logic links between the activities are there because we expect them to be fulfilled. Indeed, if activity “B” is a finish-to-start successor to activity “A” we fully expect that at some point activity “A” will finish and will provide its output to activity “B”. That is a single path forward and it is a deterministic path. It is also a somewhat simplistic model.

EVM Consulting - Deterministic Relationships in EVMS

Multiple Outcomes

Our management system asks us to perform root cause analysis followed by corrective action. But what if there is more than one corrective action to be taken. And worse; what if the corrective actions can have multiple outcomes with each enjoying its own probability. That means multiple choices and multiple outcomes. How would we show that in our plan? How would we analyze the multiple possible futures that such a situation presents?

Happily, there are ways to model a future without a set path. And once we have the future model, there are also ways to simulate the outcomes to give the probabilities we need to decide which actions to take. We are talking about probabilistic branching, and we are saying that we can build a probabilistic map of the future to use in making decisions; especially making decisions on corrective actions.

Take a simple example of running a test on the project. The expectation is that eventually we will pass the test. We will keep trying until we do. In the IMS deterministic model the test portion of the IMS might look like this:

EVM Consulting - Run the Test then Use the Product

Simulation

We can simulate this situation with different expected durations for the test. That is helpful information, but it does not explain or even capture what is going on in those different durations. It looks like we are just taking longer to do the testing but is that really what is happening? What is going on here? We certainly don’t show that.

In the real world, this simple model might have three potential outcomes. There might be three paths we can take to get to the point where we use the product. Each path has a time and money cost. We might run the test and find that we passed. Or we might have to stop the test for issues on the item or the test setup. We might even fail the test and must correct something about the product to improve our chances of passing a rerun. Eventually we will get to a usable product. But what do we put in our estimate and our plan? What do we tell the resources we need? What do we tell the boss? The customer?

EVM Consulting - Real World Testing

Full Future Model

We now have a much better understanding of the future and can explain the situation. We also can simulate the situation to find out the most likely time and cost outcomes, so we can explain the future without any histrionics or arm waving.
If the issue is important enough we can build out the full future model and simulate it.

EVM Consulting - Full Future Model and Simulation

No matter how far we pursue the model of the future, having a valid model and being able to stand on solid ground are very valuable to us as project managers.

This is not to say that we should model out complex situations as a routine in the IMS. That would be impossible, or at least prohibitively costly. We are saying that when situations arise, we need to be able to use the IMS to help us make decisions.

This type of probabilistic modeling of the future is particularly useful in defining major decision points in our plan. When we reach a decision point the IMS may have multiple branches as successors but that implies we take every branch and that is not valid. Modeling each branch and its probabilities is valid. In the example below, where the milestone represents a decision point, we have shown three possible paths to take. If each were modeled out into the future with time and cost data, we should have the information we need to choose the path we wish to pursue. Without processes and tools like this, we would be flying blind.

Future Blog Posts

This discussion will be continued in future blogs to develop a better foundational understanding of the process and power of probabilistic modeling in our EVMS.

EVM Consulting - Decision Point

Good information sets the stage for good decisions. The IMS and the EVMS have sufficient information to help us model the pathways ahead of our critical decisions. We just need to learn to take advantage of what we have available to us.

Find out how an experienced Humphreys & Associates EVM Consultant can help you create a full future model and simulation of your most vital EVMS Systems. Contact Humphreys & Associates at (714) 685-1730 or email us.

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