Cost Engineering Nov Dec 2013 - (Page 4)

TECHNICAL ARTICLE Forensic Schedule Analysis - Chapter 2: Delay Analysis On Non CPM Scheduled Projects James G. Zack Jr., CFCC FAACE and Steven A. Collins Abstract: AACE International Recommended Practice 29R-03 - Forensic Schedule Analysis, provides detailed insight in how CPM based schedule delay analysis should be performed. This RP provides thorough and detailed protocols for each of the nine methodologies identified. However, industry surveys from around the globe indicate that a substantial percentage of construction projects do not employ critical path method scheduling techniques. Other industry studies indicate that a large percentage of projects complete later than planned. Therefore, it can only be concluded that there are a large number of delays and delay claims on projects that do not use CPM schedules. RP 29R-03 offers no guidance concerning the performance of schedule delay analysis if there are no CPM schedules on the project. This article presents recommendations on how schedule delay analysis can be performed on projects using nine different non-CPM scheduling techniques. The article also discusses the five types of constraints present on most, if not all, construction projects and how these constraints must be used in non-CPM schedule delay analysis. The goal of this article is to initiate Chapter 2 of RP 29R03 - Forensic Schedule Analysis on Projects with No CPM Schedules. This article was first presented as CDR.815 at the 2012 AACE Annual Meeting in San Antonio. Key Words: Bar charts, constraints, CPM, critical chain, milestones, and schedules A ACE International Recommended Practice 29R-03 was issued initially on June 25, 2007. It has been twice revised, the first time on June 23, 2009, and more recently on April 25, 2011. The purpose of this RP, however, has never changed. The stated purpose is set forth in Section 1.1 as follows: "The purpose of AACE International's Recommended Practice 29R-03, Forensic Schedule Analysis, is to provide a unifying reference of basic technical principles and guidelines for the application of critical 4 Author's Note: The opinions and information provided herein are provided with the understanding that the opinions and information are general in nature, do not relate to any specific project or matter, and do not necessarily reflect the official policy or position of Navigant Consulting, Inc. Because each project and matter is unique and professionals can differ in their opinions, the information presented herein should not be construed as being relevant or true for any individual project or matter. Navigant Consulting, Inc. makes no representations or warranties, expressed or implied, and is not responsible for the reader's use of, or reliance upon, this article, nor any decisions made based on this article. path method ("CPM") scheduling in Building ("CIOB") in their survey of the UK construction industry found that only forensic schedule analysis." 14% of the respondents had experience The RP provides detailed insight into with fully linked critical path networks on the performance of schedule delay their projects. Another 8% of the analysis and thorough protocols for respondents had experience with, "...a forensic scheduling using CPM schedules. partially linked network ... to show some However, the current RP 29R-03 does not of the priorities and sequence of tasks, contain any discussion concerning but without the benefit of a dynamic schedule delay analysis on those projects network." The remaining 78% of the survey respondents used bar charts executed without CPM schedules. Industry surveys indicate that a (54%); time chainage diagrams (1%); line substantial percentage of projects of balance diagrams (1%); flow charts executed globally do not use CPM (3%); meeting minutes (11%); and scheduling. The Chartered Institute of correspondence (8%) to manage time on COST ENGINEERING NOVEMBER/DECEMBER 2013

Table of Contents for the Digital Edition of Cost Engineering Nov Dec 2013

AACE International Board of Directors
Cost Engineering Journal Information
Forensic Schedule Analysis- Chapter 2: Delay Analysis On Non CPM Scheduled Projects
Forensic Schedule Analysis: Example Implementation, Part 3
The 2014 ITCM Conference
Recommended Contractual Methods For Resolving Delay Events Prospectively or Retrospectively
The 2014 Annual Meeting
Professional Services Directory
Index to Advertisers
The AACE International Online Store
Calendar of Events

Cost Engineering Nov Dec 2013

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