Current delay analysis techniques and improvements

Although, 'but-for,' and 'windows' methods are widely used in analyzing delays on construction projects, these methods suffer from several weaknesses, and need improvement. This article discusses some improvements to the currently used delay analysis techniques. An ideal method should include all types of delays, accelerations, pacing delays; and a definition of concurrent delay that matches with real resources allocation profiles. Also, the delay analysis should proceed one day at a time, accounting for the changes in criticalities of the project activities. A version of this article was included as paper PS.20 on the 2005 AACE International Transactions CD.