Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 3, Problem 1C
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 cycle time of the process (assume two shifts of 8 hours each and 5 days a week of operation)?
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JCL Inc. is a major chip manufacturing firm that sells its products to computer manufacturers like Dell, Gateway, and others. In
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The table below lists the required processing times and setup times at each of the steps. There is unlimited space for buffer inventory
between these steps. Assume that the unit of production is a wafer, from which individual chips are cut at a later…
Sawing
20 min/unit
Sanding
20 min/unit
Drilling
32 min/unit
Welding
30 min/unit
Assembly
93 min/unit
Assembly
93 min/unit
Assembly
93 min/unit
A production process is shown in the figure above. The drilling operation occurs
separately from, and simultaneously with the sawing and sanding operations.
Welding starts when both drilling and sanding operations have been completed.
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operation). Considering the process times at stations, what is the process time of the
system (in min/unit)?
Frito-Lay, the massive Dallas-based subsidiary of PepsiCo, has 38 plants and 48,000 employees in North America. Seven of Frito-Lay’s 41 brands exceed $1 billion in sales. The production process at Frito-Lay is designed for large volumes and small variety, using expensive special-purpose equipment, and with swift movement of material through the facility. Product-focused facilities, such as Frito-Lay’s, typically have high capital costs, tight schedules, and rapid processing. Frito- Lay’s facilities are located regionally to aid in the rapid delivery of products because freshness is a critical issue. Sanitary issues and necessarily fast processing of products put a premium on an efficient layout. Production lines are designed for balanced throughput and high utilization. Cross-trained workers, who handle a variety of production lines, have promotion paths identified for their particular skill set.
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Chapter 3 Solutions
Operations Management
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 - 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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