5.6. A school cafeteria is operated by five persons performing the activities in

Question

5.6. A school cafeteria is operated by five persons performing the activities in the average times shown in the following chart. Activity 1. Serve salad and dessert 2. Pour drinks 3. Serve entrèe 4. Serve vegetables 5. Tally and collect payment Average Time, Sec 10 30 60 20 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 5.7. Every fall, volunteers administer flu vaccine shots at a local supermarket. The process involves the following four steps Activity 1. Reception 2. Drug allergy consultation 3. Fill out form and sign waiver 4. Administer vaccination Average Time, Sec 30 60 45 90 a. What are the bottleneck activity and maximum number of people who can be processed per hour? b. If a fifth volunteer is assigned to help administer vaccinations, what activity now becomes the bottleneck? How has this arrangement page 142 influenced the capacity of the system? c. Using five volunteers, suggest a reallocation of activities that would result in increased service capacity, and draw a product flow diagram. What is the capacity of your improved system?

Explanation / Answer

A. Without balancing and sharing :

So Serving entree is bottleneck and the capacity is 60 units per hour.

B. When balanced

C.

3 has a spare time of 20 secs.

So capacity is 3600/60 = 60 units

T Activity Time Service capacity (3600/T) 1 10 360 2 30 120 3 60 60 Bottleneck Ans A 4 20 180 5 40 90

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