Which type of delay requires consideration of extent of responsibility for the delay?

The consideration of responsibility for a delay is central to understanding concurrent delays. In construction and project management, a concurrent delay occurs when two or more delays impact the project's completion at the same time, and at least one of those delays is excusable while the other is not.

When assessing concurrent delays, it is crucial to determine the extent to which each delay contributes to the overall delay of the project. This requires an analysis of the responsibility for each delay event. Since there is a mix of excusable and non-excusable delays occurring simultaneously, the assessment will inform how to allocate responsibility and whether any party is entitled to compensation or an extension of time.

In contrast, compensable delays typically involve situations where a contractor may be entitled to additional costs due to the actions of the owner or other parties, while excusable delays generally allow for time extensions under specific conditions without penalty. Nonexcusable delays, on the other hand, do not provide grounds for additional compensation or time, so the analysis of responsibility is not as complex or critical as it is in concurrent delays.