EBK OPERATIONS MANAGEMENT
13th Edition
ISBN: 8220103675987
Author: Stevenson
Publisher: YUZU
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Chapter 6, Problem 5P
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 240 units per eight-hour day. Task times and precedence relationships are as follows:
Do each of the following:
a. Draw the precedence diagram.
b. Determine the minimum cycle time, the maximum cycle time, and the calculated cycle time.
c. Determine the minimum number of stations needed.
d. Assign tasks to workstations on the basis of most following tasks. Use shortest processing time as a tiebreaker. If ties still exist, assume indifference in choice.
e. Compute the percentage of idle time for the assignment in part d.
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As part of a major plant renovation project, the industrial engineering department has been askedto balance a revised assembly operation to achieve an output of 240 units per eight-hour day. Tasktimes and precedence relationships are as follows: [ please refer the attachment for addl details ]
Do each of the following:a. Draw the precedence diagram.b. Determine the minimum cycle time, the maximum cycle time, and the calculated cycle time.c. Determine the minimum number of stations needed.d. Assign tasks to workstations on the basis of most following tasks. Use shortest processing timeas a tiebreaker. If ties still exist, assume indifference in choice.e. Compute the percentage of idle time for the assignment in part d.
The Action Toy Company has decided to manufacture a new
train set, the production of which is broken into six steps.
The demand for the train is 4,800 units per 40-
hourworkweek: a) Draw a precedence diagram of this
operation. b) Given the demand, what is the cycle time for
this operation? c) What is the theoretical minimum number
of workstations? d) Assign tasks to workstations. e) How
much total idle time is present each cycle? f) What is the
efficiency of the assembly line with five stations? With six
stations?
TASK
PERFORMANCE TIME (sec)
PREDECESSORS
A
20
None
30
15
15
A
E
10
В. С
30
D, E
The City Commission of Nashville has decided to build a botanical garden and picnic area in the heart of the city for the recreation of its
citizens. The precedence table for all the activities required to construct this area successfully is as follows:
Code
A
B
с
D
E
F
G
H
I
Description
Find location; determine resource requirements
Requisition of lumber and sand
Dig and grade
Saw lumber into appropriate sizes
Position lumber in correct locations
Time
(hrs)
20
60
100
30
20
10
20
10
30
Nail lumber together
Put sand in and under the equipment
Put dirt around the equipment
Put grass all over the garden, landscape, paint
Refer to the legend for the activity that corresponds to each code.
Using the line drawing tool, draw a Gantt chart for activites E through I of the project.
Immediate Predecessor(s)
None
A
A
B
D, C
E
F
F
G, H
A
B
C-
D-
E
F
G
H-
H
0
20 40
60
80 100 120 140 160 180 200
Q
✔
Chapter 6 Solutions
EBK OPERATIONS MANAGEMENT
Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.2 - MORTON SALT Introduction Morton Salt is a...Ch. 6.3 - FOXCONN SHIFTS ITS FOCUS TO AUTOMATION Foxconn...Ch. 6.3 - FOXCONN SHIFTS ITS FOCUS TO AUTOMATION Foxconn...Ch. 6.3 - Prob. 2.1RQCh. 6.3 - Prob. 2.2RQ
Ch. 6.5 - Prob. 1.1RQCh. 6.5 - Prob. 1.2RQCh. 6 - Explain the importance of process selection in...Ch. 6 - Briefly describe the five process types, and...Ch. 6 - Prob. 3DRQCh. 6 - Briefly describe computer-assisted approaches to...Ch. 6 - What is a flexible manufacturing system, and under...Ch. 6 - Prob. 6DRQCh. 6 - Why might the choice of equipment that provides...Ch. 6 - Prob. 8DRQCh. 6 - Prob. 9DRQCh. 6 - Briefly describe the two main layout types.Ch. 6 - Prob. 11DRQCh. 6 - Prob. 12DRQCh. 6 - What is the goal of Line balancing? What happens...Ch. 6 - Why are routing and scheduling continual problems...Ch. 6 - Prob. 15DRQCh. 6 - Prob. 16DRQCh. 6 - The City Transportation Planning Committee must...Ch. 6 - Identify the fixed-path and variable-path...Ch. 6 - Prob. 19DRQCh. 6 - Prob. 20DRQCh. 6 - Prob. 21DRQCh. 6 - Prob. 22DRQCh. 6 - What is cellular manufacturing? What are its main...Ch. 6 - Prob. 24DRQCh. 6 - Prob. 25DRQCh. 6 - Prob. 1TSCh. 6 - What trade-offs are involved when deciding how...Ch. 6 - Who needs to be involved in process selection?Ch. 6 - Prob. 4TSCh. 6 - Prob. 5TSCh. 6 - Prob. 1CTECh. 6 - Prob. 2CTECh. 6 - What are the risks of automating a production...Ch. 6 - Consider an assembly line such as the burrito...Ch. 6 - Prob. 1PCh. 6 - A manager wants to assign tasks to workstations as...Ch. 6 - A manager wants to assign tasks to workstations as...Ch. 6 - A producer of inkjet printer is planning to add a...Ch. 6 - As part of a major plant renovation project, the...Ch. 6 - Twelve tasks, with times and precedence...Ch. 6 - For the given set of tasks, do the following: a....Ch. 6 - A shop works a 400-minute day. The manager of the...Ch. 6 - Arrange six departments into a 2 3 grid so that...Ch. 6 - Using the information given in the preceding...Ch. 6 - Using the information in the following grid,...Ch. 6 - Arrange the eight departments shown in the...Ch. 6 - Arrange the departments so they satisfy the...Ch. 6 - a. Determine the placement of departments fix a...Ch. 6 - Prob. 15PCh. 6 - Develop a process layout that will minimize the...Ch. 6 - Prob. 17PCh. 6 - Rebalance the assembly line in Problem 7. This...
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