单项选择题 Schedule development can require the review and revision of duration estimates and resource estimates to create an approved （）that can serve as a baseline to track progress.

单项选择题 （）is a method used in Critical Path Methodology for constructing a project schedule network diagram that uses boxes or rectangles, referred to as nodes, to represent activities and connects them with arrows that show the logical relationships that exist between them.

单项选择题 The project life-cycle can be described as（）