Page 256 - DCOM303_DMGT504_OPERATION_RESEARCH

Unit 12: Critical Path Method and PERT

Notes
Activity Description Predecessor
A Pick bolt & washer -
B Insert washer in screw A
C Fix the bolt in flange A
D Screw the nut with bolt B, C
E Pick the spanner D
F Tighten the nut E
G Place the assembly apart F

4. Draw a network diagram for the project:
Activity A B C D E F G H I J
Predecessor - A B B B C C F, G D, E, F I

5. Determine the critical path and project duration for the following project:
Activity Immediate Predecessor Time (days)
A - 3
B - 7
C A 4
D B 2
E C,D 5
F A 6
G E,F 3

6. A national conference is planned in a college. The activities are listed down along with
their predecessors and time taken. Prepare a network diagram and determine the critical
activities.
Activity Description Immediate Duration (days)
Predecessor
A Confirm lead speaker and topic - 5
B Prepare brochure - 1
C Send letters to other speakers B 2
D Get confirmation from speakers C 5
E Send letters to participants C,D 2
F Obtain travel plans from speakers D 2
G Arrange for accommodation for F 1
speakers
H Get handouts from speakers F 4
I Finalize registrations G,H 10
J Arrange hall and AV I 1
K Conduct of programme J 1

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