presentation on pert

8/7/2019 PRESENTATION ON PERT

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PRESENTED BY: SUSHIL

VISHAL

UNDER GUIDANCE: PROF. JAIN


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PERT stands forProgram Evaluation Review Technique, was developed by special projects office of the

U.S navy.

It was first formally applied to the planning and control of polaris weapon system in 1958.

This technique helps to expedite complex projects.

Pert is based on expected completion time, computed from three estimates of time:

1. the optimistic time

2.The pessimistic time

3.the most likely time

The pert technique can be used for more more complicated projects like engineering and tooling projects


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All individual tasks required to complete a given program must be visualized in a clear enough manner to

be put down in a network composed of events and activities. An event denotes a specified program

accomplishment at a particular instant in time.

An activity represents the time and resources that are necessary to progress from one event to the next.

Events and activities must be sequenced on the network under a logical set of ground rules.

Time estimates is to be made for each activity of the network on a three-way basis. Optimistic (minimum),

most likely (modal), and pessimistic (maximum) performance time figures are estimated by the person or

persons most familiar with the activity involved. The three-time estimates are used as a measure of

uncertainty of the eventual activity duration.


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Finally, critical path and slack times are computed. The critical path is that sequence of activities and

events on the network that will require the greatest expected time to accomplish. Slack time is the

difference between the earliest time that an activity may start (or finish) and its latest allowable start (or

finish) time, as required to complete the project on schedule.

The difference between the pessimistic (b) and optimistic (a) activity performance times is used tocompute the standard deviation () of the hypothetical distribution of activity performance times [= (b -

a)/6]. The PERT procedure employs these expected times and standard deviations (2 is called variance)

to compute the probability that an event will be on schedule, that is, will occur on or before its scheduled

occurrence time.

In the actual utilization of PERT, review and action by responsible managers is required, generally on a

biweekly basis, concentrating on important critical path activities. A major advantage of PERT is the kind

of planning required to create an initial network. Network development and critical path analysis revealinterdependencies and problem areas before the program begins that are often not obvious or well defined

by conventional planning methods.


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Facilitates Planning

Completion of projects

Facilitates organising

Facilitates directing


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Step 1 Listing of activities related to projects

Step 2 Determining time estimates

Step 3 Determining critical path

Step 4 Monitoring sequence of activities

Step 5 Follow up

presentation on pert

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