CC Car Wash specializes in car cleaning services. The servicesoffered by the company, the exact service time, and the resourcesneeded for each of them are described in the table following:
Service | Description | Processing Time | Resource |
A. Wash | Exterior car washing and drying | 10 minutes | 1 automated washing machine |
B. Wax | Exterior car waxing | 15 minutes | 1 automated waxing machine |
C. Wheel Cleaning | Detailed cleaning of all wheels | 16 minutes | 1 employee |
D. Interior Cleaning | Detailed cleaning inside the car | 20 minutes | 1 employee |
The company offers the following packages to theircustomers:
• Package 1: Includes only car wash (service A).
• Package 2: Includes car wash and waxing (services A andB).
• Package 3: Car wash, waxing, and wheel cleaning (services A,B, and C).
• Package 4: All four services (A, B, C, and D).
Customers of CC Car Wash visit the station at a constant rate(you can ignore any effects of variability) of 50 customers perday. Of these customers, 30 percent buy Package 1, 30 percent buyPackage 2, 15 percent buy Package 3, and 25 percent buy Package 4.The mix does not change over the course of the day. The storeoperates 10 hours a day.
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For the next summer, CC Car Wash anticipates an increase in thedemand to 80 customers per day. Together with this demand increase,there is expected to be a change in the mix of packages demanded:40 percent of the customers ask for Package 1, 30 percent forPackage 2, 20 percent for Package 3, and 10 percent for Package 4.The company will install an additional washing machine to doservice A. Answer the following questions based on this newsituation.
e. What is the implied utilization rate for the washingmachines? Round your answer to the nearest whole number and ignorethe percentage sign. For example, if your answer is 0.45 or 45%,fill in 45; if your answer is 0.76 or 76%, fill in 76.
Your answer is .
