PERT In Operations Research | How To Draw PERT Diagram From Table
PERT is an acronym for "Program Evaluation and Review Technique". This was created as a means to plan and
accelerate the development of the Polaris Ballistic Missile. In USA the defence department developed a nuclear
missile to be launched from beneath the ocean's surface by a mobile submarine, which would be an effective
deterrent against aggression by an enemy. This paved way to plan how to design, develop and plan the different
stages in the production of a missile and how quickly this task could be completed. A planning and scheduling
technique named PERT gave the answer to these questions.
The following are the suggested applications when PERT or CPM is found useful.
The construction of a building or of a highway.
Planning and launching a new product.
Scheduling maintenance for a project.
The manufacture and assembly of a large machine tool.
To conduct a music or drama festival.
Preparation of budget for a company
Each activity is represented by one and only one arrow. This means that no single activity can be
represented twice in a network.
(b) No two activities can be identified by the same end events. This means that there should not be loops in the
network.
(c) Time follows from left to right. All the arrows point in one direction. Arrows pointing in opposite direction
must be avoided.
(d) Arrows should not cross each other.
(e) Every node must have at least one activity preceding it and at least one activity following it, except for the
nodes at the very beginning and at the very end of the network
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