What is the Difference Between PERT and CPM

What is PERT?

Program (Project) Evaluation and Review Technique (PERT) in an activity to understand the planning, arranging, scheduling, coordinating, and governing of a project. This program helps to understand the technique of a study taken to complete a project, identify least and minimum time taken to complete a whole project. PERT was developed in the 1950s, with the aim to minimise the cost and time of a project.

In PERT, the project is segregated into events and activities. After discovering a proper sequence, the network is built. It is then the time for each task is calculated, and a path is regulated.

What is CPM?

Critical Path Method (CPM) developed in the 1950s is an algorithm needed for planning, arranging, scheduling, coordinating, and governing of a project. It is presumed that in this method the activity time is specified and fixed. It is used to calculate the quickest and latest start time for each task.

CPM helps to distinguish the critical and non-critical task, reduces the time and bypass the queue formation in the process. It is essential to identify critical activity because if any activity is hindered, it will clutter the whole process.

In this process, first, the list of all the activity is prepared, followed by the time required by each of these activities. Then the dependency connecting the activities is decided. Here, the series of the activity in a network is defined as ‘path’.

This article is ready to reckoner for all the students to learn the difference between PERT and CPM.

Basis PERT CPM
Meaning PERT is a technique, used to manage the uncertain task of a project. CPM is a statistical technique used to manages the activities of a project.
Method To control time To control cost and time
Progress Research and development project Construction project
Manage Unpredictable activities Predictable activities
Appropriate for Research & Development project Non-research project. Example-ship building, civil construction

The above mentioned is the concept, that is elucidated in detail about ‘PERT and CPM’ for the Commerce students. To know more, stay tuned to BYJU’S.

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