Consider a systems development project with the following data
Activity Duration (weeks) Precedence Relationship
1. Software design 2 -
2. Module 1 Coding 14 1
3. Module 2 Coding 18 1
4. Module 3 Coding 15 1
5. Unit Test 1 2 2
6. Unit Test 2 3 3
7. Unit Test 3 1 4
8. Integration Test 3 5, 6, 7
9. Systems Test 1 8
10. Acceptance Test 1 2 9
11. Acceptance Test 2 1 9
12. System Release 1 10, 11
a) Draw the project network.
b) Identify the critical activities.
c) What is the least number of weeks required to complete the project?
d) Among the activities that have a non-zero slack, which is the activity with the least slack?
e). Activities 2, 3, and 4 will have to be done in parallel at least for some duration if the project has to be completed in the least possible time.