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Journal of the Operational Research Society

, Volume 46, Issue 7, pp 809–818 | Cite as

The Effects of Design Changes and Delays on Project Costs

  • Terry Williams
  • Colin Eden
  • Fran Ackermann
  • Andrew Tait
Case-Oriented Paper

Abstract

This paper describes a study of a large design and manufacture engineering project, undertaken as part of a Delay and Disruption litigation. Design changes and delays in design approval would have caused delay to the project; in order to fulfil a tight time-constraint, management had to increase parallel development in the network logic, reducing delay but setting up feedback loops that markedly increased total project spend. Cognitive mapping was used to elicit the relationships, which suggested the use of System Dynamics to quantify the effects. Results are described that show the effect of levels of design changes and approval delays, and their compounding effect. The wider implications on modelling projects are also discussed.

Keywords

project management system dynamics 

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Copyright information

© Operational Research Society 1995

Authors and Affiliations

  • Terry Williams
    • 1
  • Colin Eden
    • 1
  • Fran Ackermann
    • 1
  • Andrew Tait
    • 1
  1. 1.Department of Management ScienceStrathclyde University

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