OPERATIONS MANAGEMENT W/ 360 DAY CONNECT
2nd Edition
ISBN: 9781266763212
Author: CACHON
Publisher: MCG
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Chapter 3, Problem 2C
The Tesla Model S, one of the most sought-after luxury cars, is produced in Tesla’s Freemont factory in California. The production process can be broken up into the following subprocesses.
Stamping: In the stamping process, coils of aluminum are unwound, cut into level pieces of sheet metal, and then inserted into stamping presses that shape the metal according to the geometry of the Model S. The presses can shape a sheet of metal in roughly 6 seconds.
Subassembly: The various pieces of metal are put together using a combination of joining techniques, including welding and adhesion. This creates the body of the vehicle.
Paint: The body of the vehicle is then moved to the paint shop. After painting is completed, the body moves through a 350° oven to cure the paint, followed by a sanding operation that ensures a clean surface.
General assembly: After painting, the vehicle body is moved to the final assembly area. Here, assembly workers and assembly robots insert the various subassemblies, such as the wiring, the dash board, the power train and the motor, the battery pack, and the seats.
Quality testing: Before being shipped to the customer, the now-assembled car is tested for its quality. It is driven on a rolling road, a test station that is basically a treadmill for cars that mimics driving on real streets.
Overall, the process is equipped with 160 robots and 3000 employees. The process produces some 500 vehicles each week. It takes a car about 3–5 days to move from the beginning of the process to the end.
Imagine you could take a tour of the Tesla plant. To prepare for this tour, draw a simple process flow diagram of the operation.
What is the flow time?
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Fill in the table below with the activity times after crashing to show the resulting schedule. (Enter your responses as whole numbers.)
Activity
A
B
с
Time according to
schedule (weeks)
Activity
F
G
H
Time according to
schedule (weeks)
D
E
COE
Given the information below, estimate the probability that the noncritical path B-F-G will take more than 20 weeks. Hint: Subtract from 1.0 the probability that B-F-G
will take 20 weeks or less. Refer to the standard normal table.
Activity
A
Expected Time (weeks)
Variance
3.5
1.00
BCDE
5.5
0.96
C
4.0
0.45
12.0
1.78
6.5
2.25
F
G
9.0
2.78
4.5
0.69
The probability that this path will take more than 20 weeks to complete is
(Enter your response rounded to four decimal places.)
You are the event manager of a wedding project that is behind schedule and over budget. The client has requested some additional features that were not in the original scope.
How would you prioritize the additional features requested by the client?
What strategies would you employ to adjust the project plan and budget to accommodate these changes effectively?
Additionally, what specific tools and techniques would you utilize to monitor and control the progress and ensure the quality of the project?
Chapter 3 Solutions
OPERATIONS MANAGEMENT W/ 360 DAY CONNECT
Ch. 3 - Prob. 1CQCh. 3 - Prob. 2CQCh. 3 - Prob. 3CQCh. 3 - Prob. 4CQCh. 3 - You observe a long line at the airport security....Ch. 3 - Prob. 6CQCh. 3 - What is the maximum utilization a resource can...Ch. 3 - Is the capacity of the bottleneck larger than,...Ch. 3 - Prob. 9CQCh. 3 - You observe a vehicle registration department at...
Ch. 3 - Prob. 1PACh. 3 - A community health systems nurse team consists of...Ch. 3 - Consider a process consisting of three resources....Ch. 3 - Prob. 4PACh. 3 - Prob. 5PACh. 3 - Prob. 6PACh. 3 - Prob. 7PACh. 3 - Consider a four-step serial process with...Ch. 3 - Consider a four-step serial process with the...Ch. 3 - Prob. 10PACh. 3 - Prob. 11PACh. 3 - Prob. 12PACh. 3 - The Tesla Model S, one of the most sought-after...Ch. 3 - The Tesla Model S, one of the most sought-after...Ch. 3 - The Tesla Model S, one of the most sought-after...Ch. 3 - The Tesla Model S, one of the most sought-after...
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