When using a detailed estimate as the basis for work package/activity durations, which element does...

 Estimating Activity Durations:

The critical factors are crew size, labor hours, and the standard workday.

Cost estimation is not directly required to calculate durations.

 Evaluation of Options:

Option A: Incorrect. Crew size is needed for productivity estimation.

Option B: Incorrect. Labor hours are directly tied to durations.

Option C: Incorrect. Workday hours define the available time.

Option D: Correct. Cost is not directly linked to duration