The document provides an overview of the Program Evaluation and Review Technique (PERT), which is a method for analyzing project tasks and estimating the time required to complete a project. It discusses key terminology such as optimistic, realistic, and pessimistic time estimates, and outlines steps for calculating expected time, drawing a network diagram, and identifying the critical path. An example is also presented to demonstrate the calculation of expected duration and standard deviation for project activities.

1. Program
evaluation and
review technique
Presented By:
Gautam Chopra
Saurabh Chopra
Pradhumn Soni
Chaman Tanwar
Kanak Binayakiya

2. Contents
• Overview
• History
• Terminology
• Implementation
• As project scheduling tool

3. Overview
• Program (Project) Evaluation and
Review Technique (PERT) It is basically a
method to analyse 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.

4. Terminology
• OPTIMISTIC TIME (O): Best time if
everything goes perfectly
• REALISTIC TIME(M): Most likely time
• PESSIMISTIC TIME(P): A worst-case
situation

6. Steps of PERT
• With the help of above formula we will find “Expected
Time” for each activity.
• Draw a network.
• From the PERT network diagram take the various ratio
diagram and find the overall expected duration as sum of
duration activities on the route.
• The route path which shows maximum duration is critical
path
• The variance of expected time for each activity
• Tp – To
6
• Then we have to find out Standard Deviation which is
S.D = √Sum of variance of activities on critical Path
{ }
2
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7. Jobs
Duration
Optimistic Most Likely Pessimistic Expected Duration Variance
1-2 3 6 15 7 4
2-3 6 12 30 14 16
3-5 5 11 17 11 4
7-8 4 19 28 18 16
5-8 1 4 7 4 1
6-7 3 9 27 11 16
4-5 3 6 15 7 4
1-6 2 5 14 6 4
2-4 2 5 8 5 1
EXAMPLE:-

8. 1 2 3 5
8
7
6
4

9. • 1-2-3-5-8 = 7+14+11+4 =36
• 1-2-4-5-8 = 7+5+7+4 =23
• 1-6-7-8 = 6+11+18 = 35
Activity 1-2-3-5-8 is having longer duration so it is lying on
the critical path.

10. Standard Deviation
1-2-3-5-8
S.D. =√2+16+4+1
= √25
S.D. = 5

11. THANK YOU