QUESTION FOUR [25]

4.1 The following table represents a project you are working on.

Activity Predecessor Time (days) Time Time (days) Optimistic (days) Pessimistic Most likely 15 18 25 15 18 20 C a,b 6 10 12 d C 18 24 26 13 19 25 12 18 23 d 15 17 19 h f,g 22 25 30 ef 11 15 17 4.1 Calculate the time (t) and variance (v) for each activity. (8) 4.2 Describe how the network diagram (AON) can be used for the information presented above. (diagram not required) (12) 4.3 Identify the paths and the critical path.