OPERATIONS MANAGEMENT LL PACKAGE
11th Edition
ISBN: 9781323592632
Author: KRAJEWSKI
Publisher: Pearson Custom Publishing
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Textbook Question
Chapter 5, Problem 14P
Use the longest work element rule to balance the assembly line described in the following table and Figure 5.16 so that it will produce 40 units per hour.
- What is the cycle time?
- What is the theoretical minimum number of workstations?
- Which work elements are assigned to each workstation?
- What are the resulting efficiency and balance delay percentages?
- Use the shortest work element rule to balance the assembly line. Do you note any changes in solution?
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Students have asked these similar questions
The desired daily output for an assembly line is 360 units. This assembly line will operate 450 minutes per day. The following table contains information on this product’s task times and precedence relationships:
TASK
TASK TIME (SECONDS)
IMMEDIATE PREDECESSOR
A
30
—
B
35
A
C
30
A
D
35
B
E
15
C
F
65
C
G
40
E, F
H
25
D, G
What is the required workstation cycle time to meet the desired output rate?
Balance this line using the largest number of following tasks. Use the longest task time as a secondary criterion.
Note: Leave no cells blank - be certain to enter "0" wherever required.
Francis Johnson’s plant needs to design an efficient assembly line to make a new product. The assembly line needs to produce 15 units per hour, and there is room for only four workstations. The tasks and the order in which they must be performed are shown in the following table. Tasks cannot be split, and it would be too expensive to duplicate any task.
TASK
TASK TIME (MINUTES)
IMMEDIATE PREDECESSOR
A
1
—
B
2
—
C
3
—
D
1
A, B, C
E
3
C
F
2
E
G
3
E
What is the workstation cycle time required to produce 15 units per hour?
Note: Round your answer to 1 decimal place.
Balance the line to use the fewest possible workstations to meet the cycle time found in part (b). Use whatever method you feel is appropriate. What is the efficiency of your line balance, assuming the line operates at the cycle time from part (b)?
Note: Round your answer to 1 decimal place.
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 5 Solutions
OPERATIONS MANAGEMENT LL PACKAGE
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