EBK BUSINESS STATISTICS
7th Edition
ISBN: 8220102743984
Author: STEPHAN
Publisher: PEARSON
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Dean Smith is dissatisfied with the time it takes to get a new faculty ID made and believes more servers will speed up service and reduce costs thanks to shorter lines. Prof. Karen is tasked to study the situation. Prof. Karen observes an average of 20 customers/hr arriving and each technician (service window) services 5 customers/hr, on average. Assume an M/M/s queue system.
Prof. Karen calculates the operational cost of each server as $20/hr, and assumes a cost of waiting in the SYSTEM as $25/hr per customer.
What is the optimal number of service windows to minimize total cost?
Approaching the month of Ramadan, PT Prima Sehat predicts that there will be an increase in demand for electronic goods, both TVs and microwaves. All of these electronic products have the same processing process, but have different processing times. For TV requires 4 hours of electronic processing and 2 hours of assembly. While the microwave requires 3 hours of electronic processing time and 1 hour of assembly. Of the current capacity, there is a working time for electronics as much as 240 hours, and per work time as much as 100 hours. The profit for each product is 7 (in tens of thousands) and 5 (in tens of thousands).
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Tailwind, Inc., produces high-quality but expensive training shoes for runners. The Tailwind shoe, which
sells for $210, contains both gas- and liquid-filled compartments to provide more stability and better
protection against knee, foot, and back injuries. Manufacturing the shoes requires 10 separate tasks.
There are 400 minutes available for manufacturing the shoes in the plant each day. Daily demand is
62. The information for the tasks is as follows:
Fig. 1
Task
A
Performance
Time (mins)
1
Predecessors
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A
1
B
B
C, D
A
F
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G
1
4
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a-b) The correct precedence relationship with one of the possible assignments of tasks using the
"ranked positioned weight" to workstations is shown in
c) The efficiency of the assembly line with 5 workstations shown in the figure chosen above= %
(enter your response as a percentage rounded to one decimal place).
d) The idle time for the assembly line per cycle = ☐ minute(s) (enter your response as a
whole number).
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Fig. 2…
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