A methodology for assessing construction project delays

Different categories of delay and the different types of delay found on construction projects are identified. Existing methods for assessing the effect of delaying events are reviewed and the results of an industry survey presented. None of the commonly recognized methods for delay analysis allow the assessment of three important issues at the same time: the progress of the project at the time the delay occurred; the changing nature of the critical path; and the effects of action taken (or that should have been taken) to minimize potential delays. A new method of delay analysis is presented. This method takes into consideration all these issues, and is a clear, straightforward step-by-step approach to the calculation of the expected delay in the completion of the project as a result of delays in activities encountered during the project. It uses a dynamic model considered by both experts and practitioners to be the best method to take account of progress and form the basis of delay claims.