Productivity, Performance, & Earned Value

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  • 1.  Design model progressing methods

    Posted 09-13-2022 02:44 PM
    How do you track design progress in your models? Do you use rules of credit/earning rules? If so what are they for the specific deliverables?

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    Richard Plumery EVP
    Operations Executive, SVP
    AECOM
    Castle Rock CO
    (720) 840-3902
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  • 2.  RE: Design model progressing methods

    Posted 09-14-2022 12:04 PM
    Rich, yes, often design progress is measured using rules of credit, especially when integrated with an EVM system.  Of course, this methodology isn't fool proof, especially in the early stages of design, because drawing counts can go up and down during the design phase.  Hopefully, the drawing count variations during project design execution won't be too extreme so what progress is measured doesn't become considered as unreliable or unrealistic by the owner during project execution.  From my experience, working on large design projects, the rules of credit can vary from project team to project team, contract to contract, and A/E to A/E.  Other factors can play a big part in determining those rules of credit, including schedule, design sequencing, project delivery methodology, relationship with the owner, etc.  So, there really isn't a chiseled in stone set of rules.

    I hope this helps.

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    Stephen Warhoe CCP CFCC Hon. Life
    SP Warhoe LLC
    Maple Valley WA
    1 (206) 451-4320
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  • 3.  RE: Design model progressing methods

    Posted 09-14-2022 05:12 PM
    To add to Steve's comments, some organizations elect to assign weight to the major deliverables only (i.e. predefined documents at the end of each stage, which could still be in the thousands on major projects), to work around the nuance of the ever changing number of documents and drawings (as long as it is for the same scope of work). The weightage system is usually based on the estimated level of effort for these documents and drawings in terms of hours. In more simplistic approaches, I have seen a count of documents being used (i.e. each identified major document has a weight of 1.0).

    Reporting the design progress on each one of those identified deliverables for each one of the project disciplines  (i.e. Civil, Electrical, Mechanical, Instrumentation) can be rolled up to report the design progress of the overall project.

    I almost did this exclusively on a major transit project for a couple of years in the past and enjoyed it tremendously. Design progress measurement and control is very dynamic!

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    Ghaith Al-Hiyari PMP CCP
    Associate Director
    Turner & Townsend
    Toronto ON
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  • 4.  RE: Design model progressing methods

    Posted 09-15-2022 01:04 PM
    If 'design model' is a BIM model, the BIM Forum Level of Development (LOD) Specification provides a nice framework for assessment. The specification is currently specific to buildings. The latest December 2021 version is available on line.

    Abhi

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    Abhimanyu Basu
    President
    Basu Technology Inc
    Cherry Hill NJ
    1 (8562161236
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  • 5.  RE: Design model progressing methods

    Posted 09-15-2022 12:08 PM
    Richard:

    My preference is to get a count of hours and total costs for each discipline, subtotaled at each stage-gate milestone deliverable (concept design, detailed design, construction docs).  Then we can use EVMS to monitor - but we have to get both hours and costs so we can overcome the consumed hours inaccuracy.  I've found that to work well, but it is very difficult to get the design PM to provide that level of detail.

    My fallback position is to do something similar using a drawing sheet count for each discipline.  I've found that the A/E seems to use an estimated sheet count when they estimate their own hours, so that's a common unit.  Then the chase is to get them to define the planned number of sheets in each discipline at the phase-gate milestones.  When I can get that information, it also seems to track well with profitable performance.  Sheet counts might vary slightly but I haven't found them to be too far off from the estimate.

    Once in a while, I've had to provide durations per discipline to get submit milestone deliverables.  When I have to do this, I use the AACE Estimate Input Checklist and Maturity Matrix from the Cost Estimate Classification System RP for the relevant industry.

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    Christopher (Chris) "Chris" Carson CEP DRMP PSP FAACE
    Director of Program & Project Controls, Vice President
    ARCADIS, U.S., Inc.
    Virginia Beach VA
    (757) 342-5524 Chris.Carson@Arcadis.com
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