The tasks performed in a cafeteria to serve a customer and the average service times are as follows:

The only precedence relationship is that “collect money5' has to be last. The current layout performs these tasks in the sequence given: each task is performed by one worker except that only one worker serves both dessert and drink.
a. i. Draw the precedence network.
ii. What is the maximum number of customer's who can be served per hour (capacity) using tire current layout?
iii. Assuming that capacity in part it equals desired output, what are the cycle time and minimum number of workstations (workers) needed?
iv. Suppose that capacity' has to be increased. Where can the sixth worker be employed, assuming that equipment is not a constraint?
Y. How can we keep the same number of workers (five) but change the process in order to increase the capacity?
b. Using cycle time = 35 seconds and “Assign tire task with the longest time5' heuristic rule, balance the assembly line, and calculate the percentage idle time.