PERT Analysis. Program evaluation and review technique. Optimistic Time, Realistic Time, Pessimistic Time. A presentation from students of RNB Global University.

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
______________________________

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