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(CDR-1696) Implementing Complex Time Impact Analyses on Oil & Gas Projects

Primary Author: Mr. Ronald J. Rider and Mr. Rod Charles Carter CCP PSP

Audience Focus: Advanced
Application Type: Application
Venue: 2014 AACE International Annual Meeting, New Orleans, LA, USA

Abstract: AACE International’s Recommended Practices for Forensic Schedule Analysis (29R-03) and Time Impact Analysis - As Applied in Construction (52R-06) provide general guidelines for inserting delay events to impact a schedule. In practice, creating and adding delay events and modeling their schedule impacts can be quite complex, especially on highly impacted oil & gas projects that span several years. This paper discusses the inherent complexities and provides practical considerations and methods for:

  • Creating fragnet activities and statusing them across multiple analysis windows
  • Quantifying extended durations to account for additional work
  • Tying fragnets to impacted activities using Finish-to-Finish (FF) logic
  • Evaluating Contractor-responsible delays that are embedded in Owner-responsible events

The methods discussed in this paper are drawn from the authors’ experience in implementing retrospective Time Impact Analyses (MIP 3.7 Modeled/Additive/Multiple Base) on large EPC oil and gas project disputes. The examples are drawn from a 6,000-activity schedule on a gas plant project impacted by hundreds of changes and delayed by 16 months.