Comfy Shoes Inc. builds shoes tailored to meet each individual customer’s needs. Customers who visit the downtown offices of Comfy Shoes can choose one or more of the following four custom-tailoring services. Customers receive their shoes in the mail within a week of their initial visit. Service Description Processing Time Resource used A. Walking Basic Take measurements for basic walking shoes. 12 min. 1 attendant B. Walking Plus Choose specific design (e.g. material, color selection). 12 min. 1 attendant C. Running Basic Take measurements for tailor-made running shoes. 10 min. 1 attendant D. Running Plus Consult physical therapist and obtain precise needs for running shoes. 40 min. 1 attendant The company offers the following packages to their customers: Package 1: Includes only Walking Basic (Service A) Package 2: Includes Walking Basic and Walking Plus (Services A and B). Package 3: Walking Basic, Walking Plus and Running Basic (Services A, B and C). Package 4: All four services (A, B, C, and D) Customers of Comfy Shoes visit the store at a constant rate (you can ignore any effects of variability) of 20 customers per day. Of these customers, 45% buy Package 1, 10% buy Package 2, 20% buy Package 3 and 25% buy Package 4. The mix does not change over the course of the day. The store operates 12 hours a day. a) What is the implied utilization of the attendant in service D? b) Which resource has the highest implied utilization? At the end of the spring season, Comfy Shoes anticipates an increase in the demand to 50 customers per day. A change in the mix of packages demanded is also expected: 30% of the customers ask for Package 1, 10% for Package 2, 10% for Package 3 and 50% for Package 4. The company will hire an additional attendant to help with Service A (Walking Basic). c) What will be the bottleneck in the process given this new demand pattern and additional attendant ? d) How many customers a day will not be served ?
Comfy Shoes Inc. builds shoes tailored to meet each individual customer’s needs. Customers who visit the downtown offices of Comfy Shoes can choose one or more of the following four custom-tailoring services. Customers receive their shoes in the mail within a week of their initial visit.
|
Service |
Description |
Processing Time |
Resource used
|
|
|
A. Walking Basic |
Take measurements for basic walking shoes. |
12 min. |
1 attendant |
|
|
B. Walking Plus |
Choose specific design (e.g. material, color selection). |
12 min. |
1 attendant |
|
|
C. Running Basic |
Take measurements for tailor-made running shoes.
|
10 min. |
1 attendant |
|
|
D. Running Plus |
Consult physical therapist and obtain precise needs for running shoes.
|
40 min. |
1 attendant |
|
The company offers the following packages to their customers:
- Package 1: Includes only Walking Basic (Service A)
- Package 2: Includes Walking Basic and Walking Plus (Services A and B).
- Package 3: Walking Basic, Walking Plus and Running Basic (Services A, B and C).
- Package 4: All four services (A, B, C, and D)
Customers of Comfy Shoes visit the store at a constant rate (you can ignore any effects of variability) of 20 customers per day. Of these customers, 45% buy Package 1, 10% buy Package 2, 20% buy Package 3 and 25% buy Package 4. The mix does not change over the course of the day. The store operates 12 hours a day.
- a) What is the implied utilization of the attendant in service D?
- b) Which resource has the highest implied utilization?
At the end of the spring season, Comfy Shoes anticipates an increase in the demand to 50 customers per day. A change in the mix of packages demanded is also expected: 30% of the customers ask for Package 1, 10% for Package 2, 10% for Package 3 and 50% for Package 4. The company will hire an additional attendant to help with Service A (Walking Basic).
- c) What will be the bottleneck in the process given this new demand pattern and additional attendant ?
- d) How many customers a day will not be served ?
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