A medical equipment testing and calibration service is shown below. The customer usually brings the equipment to the service center. The service process requires service technicians to perform three process steps #1 to #3. Each technician is cross-trained so they can perform any of the three steps. The inspector does step #4 alone. After step #4, two parallel work activities are performed. That is, a shipping clerk packs the work (step #7), while simultaneously, a billing clerk prepares the invoice (step #5), and the customer is contacted by phone for pick-up (step #6). The average throughput is three equipment units per hour. Start Activity Start 1 2 3 4 5 6 7 Activity Time (minutes) 4 The table below shows the work content of the process steps, activity times in minutes per unit, shared and non-shared work activities, and the type of resource required. There are three service technicians on duty, one inspector, one billing clerk, and one shipping clerk. 9 18 23 15 2 10 25 S Activity Performed By Service technician Service technician Service technician 7 Inspector Billing clerk Billing clerk Shipping clerk End

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section: Chapter Questions
Problem 59P
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A medical equipment testing and calibration service is shown below. The customer usually brings the equipment to the service center. The service process requires service technicians to perform three
process steps #1 to #3. Each technician is cross-trained so they can perform any of the three steps. The inspector does step #4 alone. After step #4, two parallel work activities are performed. That is,
a shipping clerk packs the work (step #7), while simultaneously, a billing clerk prepares the invoice (step #5), and the customer is contacted by phone for pick-up (step #6). The average throughput is
three equipment units per hour.
Start
Activity
Start
1
N
The table below shows the work content of the process steps, activity times in minutes per unit, shared and non-shared work activities, and the type of resource required. There are three service
technicians on duty, one inspector, one billing clerk, and one shipping clerk.
3 4
567
Activity Time
(minutes)
I
18
5
2 ~ 음음
Activity
Performed By
Service technician
Service technician
Service technician
7
Inspector
Billing clerk
Billing clerk
Shipping clerk
6
End
Transcribed Image Text:A medical equipment testing and calibration service is shown below. The customer usually brings the equipment to the service center. The service process requires service technicians to perform three process steps #1 to #3. Each technician is cross-trained so they can perform any of the three steps. The inspector does step #4 alone. After step #4, two parallel work activities are performed. That is, a shipping clerk packs the work (step #7), while simultaneously, a billing clerk prepares the invoice (step #5), and the customer is contacted by phone for pick-up (step #6). The average throughput is three equipment units per hour. Start Activity Start 1 N The table below shows the work content of the process steps, activity times in minutes per unit, shared and non-shared work activities, and the type of resource required. There are three service technicians on duty, one inspector, one billing clerk, and one shipping clerk. 3 4 567 Activity Time (minutes) I 18 5 2 ~ 음음 Activity Performed By Service technician Service technician Service technician 7 Inspector Billing clerk Billing clerk Shipping clerk 6 End
The table below shows the work content of the process steps, activity times in minutes per unit, shared and non-shared work activities, and the type of resource required. There are three service
technicians on duty, one inspector, one billing clerk, and one shipping clerk.
Round your answers to the nearest whole number.
a. What is the service rate for the service technician?
b. What is the labor utilization rate (%) for the billing clerk?
60
minutes/unit
Po
c. What is the labor utilization rate (%) for the service technician?
9/
Inspector utilization:
Po
✔
Activity
Start
1
2
Shipping clerk utilization:
What job represents the bottleneck in this process?
The Shipping clerk
job is the bottleneck.
3
d. Calculate the labor utilization rates (%) for the inspector and the shipping clerk.
4
5
6
End
Activity Time
(minutes)
9
18
23
15
25
Activity
Performed By
Service technician
Service technician
Service technician
Inspector
Billing clerk
Billing clerk
Shipping clerk
Transcribed Image Text:The table below shows the work content of the process steps, activity times in minutes per unit, shared and non-shared work activities, and the type of resource required. There are three service technicians on duty, one inspector, one billing clerk, and one shipping clerk. Round your answers to the nearest whole number. a. What is the service rate for the service technician? b. What is the labor utilization rate (%) for the billing clerk? 60 minutes/unit Po c. What is the labor utilization rate (%) for the service technician? 9/ Inspector utilization: Po ✔ Activity Start 1 2 Shipping clerk utilization: What job represents the bottleneck in this process? The Shipping clerk job is the bottleneck. 3 d. Calculate the labor utilization rates (%) for the inspector and the shipping clerk. 4 5 6 End Activity Time (minutes) 9 18 23 15 25 Activity Performed By Service technician Service technician Service technician Inspector Billing clerk Billing clerk Shipping clerk
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