Use a WBS summary activity to summarize a WBS level. The WBS summary activity comprises a group of activities that share a common WBS level. For example, all activities whose WBS codes start with A (A.1, A.1.1, A.1.1.2, A.2, A.3 and so forth) can be part of one WBS activity whose WBS code is A. At a lower level, all activities whose WBS codes start with A.1 (A.1, A.1.1, A.1.1.2 and so forth) can be part of a WBS activity whose WBS code is A.1.
The dates calculated on a WBS summary activity are based on the earliest start date of the activities in the group and the latest finish date of these activities. The WBS summary activity duration is calculated based on its assigned calendar.
Note
- You cannot assign constraints to WBS summary activities.