单项选择题 PDM includes four types of dependencies or precedence relationships:（）.The completion ofthe 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 activityscope of work, required resource types, estimated resource quantities, and resource calendarswith resource availabilities.

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