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

（）from one phase are usually reviewed for completeness and accuracy and approved before work starts on the next phase.

In the project management context,（） includes characteristics of unification, consolidation, articulation, and integrative actions that are crucial to project completion, successfully meeting customer and other stakeholder requirements, and managing expectations.

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.

（）involves comparing actual or planned project practices to those of other projects to generate ideas for improvement and to provide a basis by which to measure performance. These other projects can be within the performing organization or outside of it, and can be within the same or in another application area.

The（）process analyzes the effect of risk events and assigns a numerical rating to those risks.

In approximating costs, the estimator considers the possible causes of variation of the cost estimates, including（） .

The inputs of developing project management plan do not include（）

Project（） Management is the Knowledge Area that employs the processes required to ensure timely and appropriate generation, collection, distribution, storage, retrieval, and ultimate disposition of project information.

（）means that every project has a definite beginning and a definite end.