With the aid of an example, what is meant by slack? (2 marks) B. Differentiate between expected project time and project variance. (3 marks) C. The following list of activities are required for the completion of a Supermarket Chain in Jamaica: ACTIVITY PREDECESSOR OPTIMISTIC MOST LIKELY PESSIMISTIC A - 3 4 5 B A 2 3 4 с A 4 5 6 D B 4 4 4 E B 2 5 6 F C,D,E 2 4 5 G F 2 4 6 H F 4 6 7 I G,H 4 6 8 NB: Time periods are in years i. Draw the activity network for this problem. (5 marks) ii. Determine the Expected Time and Variance for each activity. (4 marks) iii. Show the activity schedule (EST, EFT, LST, LFT) as well as slack. You may work in the network but please show the results in a table. (9 marks) iv. Determine and state the critical path for this problem. This must be based on your work in c and not by inspection. (2 marks) v. What is the expected time and variance of the project? (2 marks) vi. What is the probability the project will be finished within 30 days? (3 marks) (Total 30 marks)
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