Assignment onPERT Diagram & Gantt Chart

PERT- Program Evaluation and Review Technique. PERT has been in usage since the 1950s and PERT diagrams are popular project management tools and it also most popular in the fields of business management and quality control. PERT was -developed primarily to simplify the planning and scheduling of large and complex projects. It was developed for the U.S. Navy Special Projects Office in 1957 to support the U.S. Navy's Polaris nuclear submarine project.

Basically;

PERT diagrams show precedence, activities that must be completed before the next activities may be started.

Used to calculate the critical path or the longest path through the activities.

This is the shortest time to complete the project.

PERT Diagram Example:

Start

End

Activity Time(day) Require PredecessorA 4 NoneB 3 NoneC 2 AD 1 AE 1 BF 2 BG 3 CH 2 D, EI 2 FJ 2 G

We have four (4) way to find critical path.

1. A+C+G+J = 112. A+D+H = 73. B+E+H = 64. B+F+I = 7

So critical path is, A+C+G+J = 11

And time of complete the project is 11 days.

Free slack is = Value of start point of critical path – value of start point of others non critical path.

1

2

3

4

5

6

7

8

A, 4

B, 3

C, 2

D, 1

F, 2

G, 3

H, 2

I, 2

E, 1

J, 2

A – B

= 4 – 3 = 1

PERT Diagram Advantages:1. Easy identification of the order of precedence.2. Easy identification of the critical path and thus

critical activities.3. Easy determination of slack time.

Gantt Chart :Gantt chart a chart in which a series of horizontal lines shows the amount of work done or production completed in certain periods of time in relation to the amount planned for those periods.

It is easy to construct and use.Shows activities over a period of time

ABCDEFGHIJ

1 2 3 4 5 6 7 8 9 10 11

Days

Fig : Gantt chart of given PERT diagram .

Activity