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A new approach for buffer sizing in critical chain scheduling

Behzad Ashtiani · Gh-Reza Jalali · Mir Bahador Aryanezhad · Ahmad Makui

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Resource-Constrained Project Scheduling Construction Project Management and Performance Operations Management Techniques

Abstract

The direct application of the theory of constraints (TOC) in project management is known as critical chain project management (CCPM) which is introduced by Goldratt. It is considered to be one of the popular approaches to project management. One of the most significant shortcomings in CCPM is the lack of mathematical analysis. Specifically, in buffer sizing step, Goldratt suggests using of 50% of critical chain lengths as a project buffer. Recently some approaches have been introduced to overcome this problem in CCPM. The fundamental research issues we address in this paper are the use of lognormal distribution for tasks completion time and integrate the risk of tasks in order to determine the parameters of distribution. In the next step a new method is proposed to size the buffer based on Root Square Error Method (RSEM) approach.

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2001On the merits and pitfalls of critical chain scheduling 1984A Comparison of Exact Approaches for Solving the Multiple Constrained Resource, Project Scheduling Problem 2004Critical Chain Project Management 2000Critical chain: the theory of constraints applied to project management 2005An investigation of buffer sizing techniques in critical chain scheduling 1998Project Management in the Fast Lane: Applying the Theory of Constraints 2001An investigation into the fundamentals of critical chain project scheduling 2002Resource-constrained project management using enhanced theory of constraint

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