Level:
Intermediate
TCM Section(s):
6.4. Forensic Performance Assessment
Venue: 2022 AACE International Conference & Expo
Abstract: A delay analysis using a modeled additive method—often referred to as a time impact analysis, or TIA—can be a straight-forward technique to estimate delay that may result from an event such as a design change, a damaging weather event, or a subcontractor going out of business.Using a TIA as a forensic analysis technique, as laid out in AACE Recommended Practice (RP) 29R 03 method implementation protocol (MIP) 3.6 or 3.7, requires more effort and analysis.Applying multiple TIAs to schedules through the life of the project to analyze the impact of multiple delays on a long-duration, complex project is difficult and time-consuming.This paper explains how using overlapping TIAs on such a project can produce a credible delay analysis that identifies and quantifies critical path delay.
The methodology detailed in this paper covers identification of delay events, TIA development for individual events, and evaluation of the TIAs chronologically and collectively in contemporaneous schedule updates to determine which events caused critical delay, the amount of critical delay, and event concurrency.Application of the AACE RP 29R 03 protocols for an example project is discussed.
Quantifying the impact of multiple delay events on a project and evaluating concurrency through contemporaneous updates is neither easy nor quick.However, TIAs can be used retrospectively to model multiple, complex, overlapping delays that span long periods and produce a reliable and trustworthy analysis.
TCM Section(s):
6.4. Forensic Performance Assessment
Venue: 2022 AACE International Conference & Expo
Abstract: A delay analysis using a modeled additive method—often referred to as a time impact analysis, or TIA—can be a straight-forward technique to estimate delay that may result from an event such as a design change, a damaging weather event, or a subcontractor going out of business.Using a TIA as a forensic analysis technique, as laid out in AACE Recommended Practice (RP) 29R 03 method implementation protocol (MIP) 3.6 or 3.7, requires more effort and analysis.Applying multiple TIAs to schedules through the life of the project to analyze the impact of multiple delays on a long-duration, complex project is difficult and time-consuming.This paper explains how using overlapping TIAs on such a project can produce a credible delay analysis that identifies and quantifies critical path delay.
The methodology detailed in this paper covers identification of delay events, TIA development for individual events, and evaluation of the TIAs chronologically and collectively in contemporaneous schedule updates to determine which events caused critical delay, the amount of critical delay, and event concurrency.Application of the AACE RP 29R 03 protocols for an example project is discussed.
Quantifying the impact of multiple delay events on a project and evaluating concurrency through contemporaneous updates is neither easy nor quick.However, TIAs can be used retrospectively to model multiple, complex, overlapping delays that span long periods and produce a reliable and trustworthy analysis.