4) I am interested in opening a new car wash service. After doing research, I find these information regarding service time, and the resources needed for each of them are described in the table following: Processing Time 10 min Description Exterior car washing and drying Exterior car waxing Service Resource Used A. Wash 1 automated washing machine B. Wax 10 min 1 automated waxing machine 1 employee C. Wheel Cleaning wheels D. Interior cleaning Detailed cleaning of all 7 min Detailed cleaning inside car 20 min 1 employee I plan to offer these following options to their customers: Ontion l Con wooh

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4) I am interested in opening a new car wash service. After doing research, I find these
information regarding service time, and the resources needed for each of them are described in
the table following:
Processing Time
10 min
Description
Exterior car washing and
drying
Exterior car waxing
Service
Resource Used
A. Wash
1 automated washing
machine
B. Wax
10 min
1 automated waxing
machine
1 employee
C. Wheel
Cleaning wheels
D. Interior
Detailed cleaning of all
7 min
Detailed cleaning inside car
20 min
1
ployee
cleaning
plan to offer these following options to their customers:
Option 1: Car wash only (service A).
Option 2: Car wash and waxing (services A and B).
Option 3: Car wash, waxing, and wheel cleaning (services A, B, and C).
Option 4: All four services (A, B, C, and D).
Information from market research show that customers will come at a constant rate (you can
ignore any effects of variability) of 40 customers per day. Of these customers, 40 percent buy
Option 1, 15 percent buy Option 2, 15 percent buy Option 3, and 30 percent buy Option 4. The
mix does not change over the course of the day. I keep the shop open 12 hours a day.
a) Find the implied utilization for each resource.
b) Which resource is the bottleneck?
For the next summer, I expect an increase in the demand to 80 customers per day. Together with
this demand increase, there is expected to be a change in the mix of options demanded: 30
percent of the customers ask for Option 1, 10 percent for Option 2, 10 percent for Option 3, and
50 percent for Option 4. I plan to buy an additional washing machine to do service A.
c) What will be the new bottleneck in the process?
Transcribed Image Text:4) I am interested in opening a new car wash service. After doing research, I find these information regarding service time, and the resources needed for each of them are described in the table following: Processing Time 10 min Description Exterior car washing and drying Exterior car waxing Service Resource Used A. Wash 1 automated washing machine B. Wax 10 min 1 automated waxing machine 1 employee C. Wheel Cleaning wheels D. Interior Detailed cleaning of all 7 min Detailed cleaning inside car 20 min 1 ployee cleaning plan to offer these following options to their customers: Option 1: Car wash only (service A). Option 2: Car wash and waxing (services A and B). Option 3: Car wash, waxing, and wheel cleaning (services A, B, and C). Option 4: All four services (A, B, C, and D). Information from market research show that customers will come at a constant rate (you can ignore any effects of variability) of 40 customers per day. Of these customers, 40 percent buy Option 1, 15 percent buy Option 2, 15 percent buy Option 3, and 30 percent buy Option 4. The mix does not change over the course of the day. I keep the shop open 12 hours a day. a) Find the implied utilization for each resource. b) Which resource is the bottleneck? For the next summer, I expect an increase in the demand to 80 customers per day. Together with this demand increase, there is expected to be a change in the mix of options demanded: 30 percent of the customers ask for Option 1, 10 percent for Option 2, 10 percent for Option 3, and 50 percent for Option 4. I plan to buy an additional washing machine to do service A. c) What will be the new bottleneck in the process?
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