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Capacity Problems Fat Charlie’s Restaurants is building a new burger place and needs to determine how big to make the various parts of its facility. It wants to be able to accommodate a maximum of 500 customers per hour at its peak times. Fat Charlie’s has collected the following information: the average time to place and receive an order is 1.1 minutes, the average time spent in the restroom is 0.4 minutes (50 percent of customers are men and 50 percent women), 20 percent of the customers have cars (1 customer per car) and require parking spots, and the average length of time at the restaurant is 23 minutes per customer.
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Rocky’s Pre-Cast Shop is considering two different processes for completing Pre-Cast jobs. Process A uses one person to setup the job and do the pre-casting. If this approach is used, an experienced person can complete an average of 20 jobs per day. Process B uses two people. One person does the setup and the second person does the actual pre-casting. Setup on one job can be done while pre-casting is being completed on another but pre-casting must be completed on a job before the pre-cast machine can start processing the next. After some practice, this second process can be completed with a standard time of 9 minutes for setup and 15 minutes for actual pre-casting. In either case, assume a 7.5-hour day, 5 days per week, 250 days per year.
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Assuming ideal conditions, what is the maximum capacity of process B? |
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How long would it take to process 200 jobs using process A (assume only one worker and one machine)? |
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If Rocky’s is primarily interested in providing low cost to customers, which process should he put in place? |