On Demand Webinar

How to Identify & Quantify the Effects of Cumulative Impact

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How to Identify & Quantify
the Effects of Cumulative Impact


More and more construction claims are including a loss-of-productivity component these days. But too often the claimed amount is not properly substantiated or presented.

This information-packed program will help you learn the definition of cumulative impact, how to identify its presence on a project and how to quantify cumulative impact's effects on labor productivity. Included in this presentation will be a discussion of case law on the subject of cumulative impact, examples of how to utilize the Ibbs Study, as published in the Mechanical Contractors Association of America, Inc.'s management manual, to quantify the effects of cumulative impact on a construction project and a general discussion of construction labor loss of productivity.

This session will help you:

  • Understand the subject of cumulative impact and why it's important
  • Become familiar with change and its impact on productivity
  • Review loss of productivity: cost and schedule consequences
  • Learn how to quantify loss of productivity with the latest, proven techniques:
    • MCAA factors
    • Ibbs curves
    • Measured mile concepts
  • And much, much more!
Expert Presenters

Dr. William Ibbs

University of California Berkeley & Ibbs Consulting Group

William Ibbs is a recognized expert on the subject of construction and construction claims, particularly cumulative impact of changes, schedule delay and disruption, and loss of labor productivity. He and the associates of his firm have also worked and testified on other construction-related issues, such as professional standard of care, personal injury, false claims and loss of business value disputes. He has consulted on projects with a total constructed value of $30 billion all over the world, with clients such as Bechtel, Chevron, Obayashi, the US Navy and various public agencies.

Paul Stynchcomb

Ibbs Consulting Group

Mr. Stynchcomb was formerly Senior Managing Director in the Forensic and Litigation Consulting practice of FTI. He has served the construction industry since 1984 as an expert in CPM scheduling, construction management, contract administration, and labor productivity. Prior to 1984, Mr. Stynchcomb held construction management positions in several major U.S. construction firms. Mr. Stynchcomb has been qualified as an expert in critical path method (“CPM”) scheduling, construction management, subcontract administration, delay and cost impact analysis and loss of labor productivity in federal and state courts, boards of contract appeals, and before tribunals of the AAA and ICC.

Recorded June 17, 2015

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