Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 6, Problem 18P
Summary Introduction
Interpretation:
The theoretical minimum number of workstations requires the assembly line where an assembly line must create the one finished product every 90 seconds and the sum of task time required to create a product is 295 seconds.
Concept Introduction:
The theoretical minimum number of workstations can be defined as the minimum number of workstations an assembly line or a manufacturing unit is required to produce the finished goods or to perform some specific tasks.
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A company needs to rebalance a product layout for producing new plastic license plates. They plan to use the assembly line six hours in order to meet projected demand of 2,160 license plates each day. The following table describes the tasks involved in the production of this product:
Without regard to projected demand, what is the maximum possible cycle time for this assembly line?
Task
Time (secs)
Immediate Predecessor
a
3
none
b
4
none
c
5
a,b
d
7
none
e
9
c,d
As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 250 units per 8-hour day. Task times and precedence relationships are as follows:
Task
Duration(minutes)
ImmediatePredecessor
a
0.5
-
b
0.4
a
c
0.5
b
d
0.3
-
e
1.8
d
f
1.9
c
g
2
e, f
Do each of the following: a. Determine the number of followers for each task.
(Please answer number of tasks following task for A-G)
The desired daily output for an assembly line is 540 units. This assembly line will operate 720 minutes per day. The following table contains information on this product's task times and precedence relationships:
TASK
TASK TIME(SECONDS)
IMMEDIATEPREDECESSOR
A
35
—
B
25
A
C
35
A
D
55
B
E
5
B
F
15
C
G
30
E-D
H
5
F-G
b. What is the workstation cycle time?
c. Balance this line using the largest number of following tasks. Use the longest task time as a secondary criterion. (Leave no cells blank - be certain to enter "0" wherever required.)
Chapter 6 Solutions
Practical Operations Management
Ch. 6 - Prob. 1DQCh. 6 - Prob. 2DQCh. 6 - Prob. 3DQCh. 6 - Prob. 4DQCh. 6 - Prob. 5DQCh. 6 - Prob. 1PCh. 6 - Prob. 2PCh. 6 - Prob. 3PCh. 6 - Prob. 4PCh. 6 - Prob. 5P
Ch. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 9PCh. 6 - Prob. 10PCh. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 16PCh. 6 - Prob. 17PCh. 6 - Prob. 18PCh. 6 - Prob. 19PCh. 6 - Prob. 20PCh. 6 - Prob. 21PCh. 6 - Prob. 22PCh. 6 - Prob. 23PCh. 6 - Prob. 24PCh. 6 - Prob. 25PCh. 6 - Prob. 26PCh. 6 - Prob. 27PCh. 6 - Prob. 28PCh. 6 - Prob. 29PCh. 6 - Prob. 30PCh. 6 - Prob. 31PCh. 6 - Prob. 32PCh. 6 - Prob. 1.1QCh. 6 - Prob. 1.2QCh. 6 - Prob. 1.3QCh. 6 - Prob. 1.4QCh. 6 - Prob. 2.1QCh. 6 - Prob. 2.2QCh. 6 - Prob. 2.3QCh. 6 - Prob. 3.1QCh. 6 - Prob. 3.2QCh. 6 - Prob. 3.3Q
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