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4.3.2 Critical Path Analysis (CPA)

Critical Path Analysis (CPA) or Critical Path Method (CPM) is part of a planning system called Network Analysis. CPA uses the arrow diagram in which

The Network Critical Path Analysis is used when the project is slightly more complex than able to be depicted by a simple straight line sequence. Multiple activities may lead off one action and the project may have many outcomes triggered by a sequence of parallel activities.

Identifying the critical paths helps ensure that resources are allocated to best effect. Crash action occurs when the critical path of a set duration has to be reduced. Sometimes customers will pay extra to have the time frame shortened. The Project manger then determines the appropriate crash action such as:

In order to reach the optimum cost-time solution, the first thing to do is to crash all the critical activities. When this is done, the original critical path becomes shorter (that is, a new critical path is established).

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