Money Laundry has 10 washers and 15 dryers. All orders are first sent to wash and then to dry. It takes, on average, 30 minutes to wash one order and 40 minutes to dry.
a. What is the capacity of the washing stage?
b. What is the capacity of the drying stage?
c. Identify the bottleneck(s). Briefly explain.
d. What is the capacity of Money Laundry? Briefly explain.
e. If Money Laundry would like to increase the capacity by buying one more machine, should they buy a washer or a dryer? Why?
The manager, Mr. Money, decided not to buy a machine. He still has 10 washers and 15 dryers. The manager estimates that, on average, Money Laundry receives eight orders every hour. The manager also finds that, on average, there are five orders in the washing stage and seven orders in the drying stage.
f. What is the utilization of washers, on average?
g. What is the utilization of dryers, on average?
h. On average, how long does it take an order to finish the washing process from the time the order is received?
i. On average, how long does it take an order to finish the drying process from the time the order finishes the washing process?
j. On average, how long does an order stay in Money Laundry?