5.6. A school cafeteria is operated by five persons performing the activities in the average times shown in the following chart.

Activity Average Time, Sec.

1. Serve salad and dessert 10 2. Pour drinks 30 3. Serve entrèe 60 4. Serve vegetables 20 5. Tally and collect payment 40

a. What are the bottleneck activity and the maximum service capacity per hour?

b. Suggest a reallocation of activities that would increase capacity and use only four employees, and draw a product flow diagram. What is the capacity of your improved system?

c. Recommend a way to maintain the serving capacity found in part b using only three employees.