標籤：專案管理
索引：解釋 相關資料 
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PDM is a method used in Critical Path Methodology (CPM) 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. Figure 6-7 shows a simple project schedule network diagram drawn using PDM. This technique is also called Activity-On-Node(AON), and is the method used by most project management software packages.
PDM includes four types of dependencies or logical relationships:
• Finish-to-start (FS). The initiation of the successor activity depends upon the completion of the predecessor activity.
• Finish-to-fi nish (FF). The completion of the successor activity depends upon the completion of the predecessor activity.
• Start-to-start (SS). The initiation of the successor activity depends upon the initiation of the predecessor activity.
• Start-to-fi nish (SF). The completion of the successor activity depends upon the initiation of the predecessor activity.
In PDM, fi nish-to-start is the most commonly used type of precedence relationship. The start-to-fi nish relationship is rarely used but is included here for a complete list of the PDM relationship types.
• Finish-to-start (FS). The initiation of the successor activity depends upon the completion of the predecessor activity.
• Finish-to-fi nish (FF). The completion of the successor activity depends upon the completion of the predecessor activity.
• Start-to-start (SS). The initiation of the successor activity depends upon the initiation of the predecessor activity.
• Start-to-fi nish (SF). The completion of the successor activity depends upon the initiation of the predecessor activity.
In PDM, fi nish-to-start is the most commonly used type of precedence relationship. The start-to-fi nish relationship is rarely used but is included here for a complete list of the PDM relationship types.
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