Modeling the Last Planner System Metrics: A Case Study of an Aec Company

Farook R. Hamzeh1 & Omar Z. Aridi2

1Assistant Professor, Civil and Environmental Engineering Department, American University of Beirut, Beirut Riad El-Solh 1107 2020, Lebanon, fh35@aub.edu.lb
2Civil Engineering Graduate, Civil and Environmental Engineering Department, American University of Beirut, Beirut Riad El-Solh 1107 2020, Lebanon, oza05@aub.edu.lb

Abstract

The Last Planner System (LPS) helps increase the reliability of weekly work planning by properly connecting the master or phase schedule to the weekly work plan through lookahead planning. Two key measures for the success of the lookahead planning are the tasks anticipated (TA) and the tasks made ready (TMR); the first measures the percentage of anticipated activities on the look-ahead plan a couple of weeks before execution and the second measures the performance of lookahead planning in identifying and eliminating constraints to make activities ready for implementation. The purpose of this paper is to study the relationship between TA, TMR, and PPC by analyzing LPS data collected over two years from several branches of an AEC company in the United States. The results show that company’s team was extremely agile in removing constraints which translates into a high PPC despite the uncertain nature of design explained by the low TA.

Keywords

Last Planner System (LPS), Lookahead Planning, Percent Planned Complete (PPC),Tasks Anticipated (TA), Tasks Made Ready (TMR), Weekly Work Plan (WWP)

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Reference

Hamzeh, F.R. & Aridi, O.Z. 2013, 'Modeling the Last Planner System Metrics: A Case Study of an Aec Company ' In:, Formoso, C.T. & Tzortzopoulos, P., 21th Annual Conference of the International Group for Lean Construction. Fortaleza, Brazil, 31-2 Aug 2013. pp 599-608

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