program evaluation review technique.

1. Program Evaluation Review
Technique (PERT)
Prepared by :
Krishna Kumar

2. Program (Project) Evaluation and Review Technique (PERT): is
a project management tool used to schedule, organize, and
coordinate tasks within a project. 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.
What is the PERT ?

3. Objective of the pert
 To facilitate decision making and
 To reduce both the time and cost required to
complete a project.

4. When we use PERT ?
• PERT is used when activity times are uncertain.
– Determine the duration of the project .
– Decision making under risk (“P” for probabilistic)

5. – Critical Path is helpful to determine
 ES – Earliest Start time
 EF - Earliest Finish time
 LS – Late Start time
 LF - Late Finish time
Conti….

6. Determine the duration of the project
• OPTIMISTIC TIME: Best time if everything goes perfectly
• REALISTIC TIME: Most likely time
• PESSIMISTIC TIME: A worst-case situation
B + 4M + P
Expected Time = -------------------
6

7. Determine the duration of the project
• Example:
For excavation activity let :
B = 12 days
M = 18 days
P = 60
What is the expected time for this activity?
Sol :
12 + 4(18) + 60
Expected Time = -------------------------
6
= 24 days

8. Pert Process
• Specify activities
• Sequence of the activities.
• Network diagram.
• Estimate the time.
• Critical path.
PERT PROCESS

9. Activity sequence information
 A network diagram can be drawn showing the sequence of
the serial and parallel activities.
Each activity represents: A part in the network,
The arrows represent: The relation between activities.
Construct a network diagram

10. • Simple to understand and use
• Identify the activities that need closer
attention (critical)
• Determine the flexibility available with
activities
• Show potential risk with activities (PERT)
• Help to set priorities among activities and
resource allocation as per priority
Advantages-