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Pert and the Critical Path Method

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SIMILARITIES AND DIFFERENCES BETWEEN (PERT) AND (CPM)
Critical Path Analysis and PERT are powerful tools that help you to schedule and manage complex projects. They were developed in the 1950s to control large defense projects, and have been used routinely since then.
Program (Project) Evaluation and Review Technique (PERT) is a project management tool used to schedule, organize, and coordinate tasks within a project. It is basically a method to analyze the tasks involved in completing a given project, especially the time needed to complete each task, and to identify the minimum time needed to complete the total project.
The Critical Path Method or Critical Path Analysis, is a mathematically based algorithm for scheduling a set of project activities.Critical path method seeks to determine the longest possible continuous pathway taken from the initial event to the terminal event. It determines the total calendar time required for the project; and, therefore, any time delays along the critical path will delay the reaching of the terminal event by at least the same amount.

PERT Networks and CPM Arrow Diagramsare similar in manyways and yet take paths that are often-different:Both aresystematic ways of analyzing and planningthe components ofa program or project.Both have been used extensively byindustry and government.

CPM uses activity oriented network while PERT uses event oriented network. Furthermore durations of an activity may be estimated with a fair degree of accuracy in CPM while the estimate of time for activities is not so accurate and definite in PERT. CPM is used extensively in construction projects while PERT is used mostly in research and development projects particularly projects of non- repetitive nature.
PERT NETWORK

Critical Path

Planned duration in weeks = 75/5 =

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