Question 8.
Customer dissatisfaction is the difference of actual waiting time (AWT) and expected waiting time (EWT). AWT is the actual time spent by customer before being served the dish. EWT of the customer is the time communicated by the chef.
What is the minimum waiting time (EWT) that the chef should communicate to minimise customer dissatisfaction?
Question Explanation
To minimize customer dissatisfaction, the chef will follow a pessimistic schedule (worst-case scenario).
First activity A will be started, and then B, and C can be started simultaneously. E and H will be dependent on C.
Similarly, D, F, and G will be dependent on B.
D, F, and G will not depend on C, H, E, and vice versa.
I activity will be started after all the 8 activities are done.
Based on the pessimistic schedule,
A takes = 1 min
Then B, D, F, and G will take 19 minutes.
In these 19 minutes, C and E will also be completed simultaneously.
Hence, in the first (19+1) = 20 minutes, A, B, C, D, E, F, and G will be completed. Now H will take another 13 minutes. After that, I will take 5 minutes.
Hence, the total time taken = (20+13+5) = 38 minutes.
The correct option is A
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