Activity Description Predecessor Optimistic Minutes Required Most Pessimis Activity Likely a Drain Oil 3.5 --- Replace Filter A 2 В, Е 2.5 Refill Oil --- Check Tyres Wash E Windows С, F 0.5 Fill Fluids 1.5 5344t54 3331 2122 22 ABCAEEG
Question 1
At Tropico, the activities required to service a car at a dealer can be viewed as a mini-project
summarised in the following table:
The variability in times required to perform each activity is due to the different types, sizes, and
conditions of the cars to be serviced. Round off to two decimal places were fractional.
A. Draw the activity network diagram for this problem (either AON or AOA) (5 marks)
B. Determine the Expected Time and Variance for each activity. (4 marks)
C. Show the activity
D. Use the ES, EF, LS, and LF from your activity schedule or table to determine the critical
path for the project. (2 marks)
E. What are the expected time and the variance of the project? (2 marks)
F. What is the probability the project will be finished within 10 minutes? (2 marks)
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