Copyright 2006 AACE, Inc.
AACE International Recommended Practices
AACE International Recommended Practice No. 52R-06
TIME IMPACT ANALYSIS – AS APPLIED IN CONSTRUCTION
TCM Framework: 6.4 – Forensic Performance Assessment, 7.2 – Schedule Planning
and Development, 10.2 – Forecasting, 10.3 – Change Management
Acknowledgments:
Timothy T. Calvey, PE PSP (Author)
Ronald M. Winter, PSP (Author)
Edward E. Douglas, III CCC PSP
Earl T. Glenwright, Jr. PE PSP
Kenji P. Hoshino, PSP
William H. Novak, PSP
Lee Schumacher, PE PSP
Lawrence R. Tanner, PSP
James G. Zack, Jr.
Copyright 2006 AACE International, Inc.
AACE International Recommended Practices
AACE International Recommended Practice No. 52R-06
TIME IMPACT ANALYSIS – AS APPLIED IN CONSTRUCTION
TCM Framework: 6.4 – Forensic Performance Assessment, 7.2 – Schedule Planning and
Development, 10.2 – Forecasting, 10.3 – Change Management
October 19, 2006
PURPOSE
This Recommended Practice for Time Impact Analysis (TIA) is intended to provide a guideline, not to
establish a standard. This recommended practice of AACE International on TIA provides guidelines for
the project scheduler to assess and quantify the effects of an unplanned event or events on current
project completion. While TIAs are usually performed by a project scheduler and can be applied on a
variety of project types, the practice is generally used as part of the Total Cost Management (TCM)
change management and forecasting processes on construction projects.
OVERVIEW
This recommended practice focuses on the basic elements necessary to perform a Time Impact Analysis
(TIA.) Necessary considerations and optional analysis practices are described. The TIA is a ‘forward-
looking,’ prospective schedule analysis technique that adds a modeled delay to an accepted contract
schedule to determine the possible impact of that