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Hot Shoppes

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1. Gerhard described “Long lines during the maximum demand periods” forming at step 3. Typically in manufacturing, this is referred to a bottleneck. The bottleneck would governs the maximum output. It takes the server 1 minute to perform this step. At maximum demand (not start up) this team would only be able to handle 60 people. 2. Gerhard pays his employees below minimum wage. It needs to be brought to his attention that he is breaking the law. The employees are paid 1/60th of their hourly wage every minute. This means the $3/hr people are paid 5 cents/min, the $4/hr people are paid 6.66 cents/hour, the $4.5/hr people are paid 7.5 cents/min, and the $5/hr machine is 8.33 cents/min. To process one customer the customer must go through steps 1 through 6, while in idle waiting for new customers, Gerhard still needs to pay his employees. Therefore, all tasks will use the bottlenecks time, not Gerhard’s estimated time to estimate costs. a. 1-15 seconds (5 cents) b. 2-30 seconds (5 cents) c. 3-60 seconds (5 cents) d. 4-40 seconds (5 cents) e. 5-20 seconds (6.667 cents) f. 6-30 seconds (7.5 cents) g. 5*4+6.667+7.5=34.17 cents
The soda machine costs $5/hr, and 60 customers can be processed per hour. This means it costs 8.333 cents (5/60) to operate the soda machine per customer. The grand total for 1 customer should be 42.5 cents. This cost only reflects labor of the 6 employees and the soda machine, not the cost of the food itself. 3. The bottleneck would occur at the 4th step. Recalculating for a 40 second bottleneck, 90 customers (3600 seconds / 40 seconds per customer) 4. The bottleneck would occur at the 4th step. Recalculating for a 40 second bottleneck, 31.67 cents. 5. I would put a new employee at step 4, the bottleneck would be 30 seconds. This bottleneck allows for 120 customers per hour.

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