Which is NOT an industry-recognized methodology for quantifying critical delay?

A Gantt Chart is a graphical representation of a schedule, typically in the form of a bar chart. While it displays the output of a schedule analysis, it is not, in itself, a methodology for quantifying delay. Recognized forensic delay analysis methodologies, such as Time Impact Analysis, Windows Analysis, or Collapsed As-Built, are analytical processes that use the underlying schedule logic (e.g., the Critical Path Method network) to determine the cause and extent of delays. These methods produce results that can be displayed on a Gantt chart, but the chart is the visualization tool, not the analytical method.

B. Periodic Windows (or Windows Analysis) is a recognized forensic schedule analysis methodology (AACE RP 29R-03, MIP 3.7) that analyzes delay in discrete time periods.
C. Collapsed As-Built is a recognized subtractive, retrospective forensic schedule analysis methodology (AACE RP 29R-03, MIP 3.9).
D. Time Impact Analysis (TIA) is a recognized prospective, additive forensic schedule analysis methodology (AACE RP 29R-03, MIP 3.6).

1. AACE International. (2011). Recommended Practice No. 29R-03: Forensic Schedule Analysis. Section 3

"Method Implementation Protocols

" pp. 19-106. This document details the various accepted methodologies

including Time Impact (MIP 3.6)

Windows (MIP 3.7)

and Collapsed As-Built (MIP 3.9)

but does not list Gantt Chart as an analytical method.

2. Hegazy

T. (2002). Computer-Based Construction Project Management. University of Waterloo. Chapter 5

"Project Time Management

" describes Gantt charts as a tool for "illustrating the project schedule" and not as a delay analysis technique.