单项选择题 PDM includes four types of dependencies or precedence relationships: （）. The completion of the successor activity depends upon the initiation of the predecessor activity.

单项选择题 The process of（）schedule activity durations uses information on schedule activity scope of work, required resource types, estimated resource quantities, and resource calendars with resource availabilities.

单项选择题 The （） describes, in detail, the projects deliverables and the work required to create those deliverables.