Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Chapter B, Problem 9P
Green Vehicle Inc. manufactures electric cars and small delivery trucks. It has just opened a new factory where the C1 car and the T1 truck can both be manufactured. To make either vehicle, processing in the assembly shop and in the paint shop are required. It takes 1/40 of a day and 1/60 of a day to paint a truck of type T1 and a car of type C1 In the paint shop, respectively. It takes 1/50 of a day to assemble either type of vehicle in the assembly shop.
A T1 truck and a C1 car yield profits of $300 and $220, respectively, per vehicle sold.
- a. Define the objective function and constraint equations.
- b. Graph the feasible region.
- c. What is a maximum-profit daily production plan at the new factory?
- d. How much profit will such a plan yield, assuming whatever is produced is sold?
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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.
After welding, a product needs to go through only one of the three assembly
operations (the operations are in parallel, where parallel lines perform the exact same
operation). Considering the process times at stations, what is the process time of the
system (in min/unit)?
Suppose a final assembly is produced by assembling two components. THE The first component, A, is produced internally and goes through three process steps, which are stamping, forging and machining, with scrap estimates of 10%, 15% and 25%, respectively. For every three produced units of component A, two are used in the final assembly and one is separate to meet spare parts needs. The second component, B, which is used exclusively in final assembly, is purchased from a supplier external and inspected on arrival; 2% do not pass inspection. A unit of the component purchased is required for each final assembly. The final assembly process produces 5% of scraps. Spare parts demands for component A and final Su assembly match to 1,000 and 5,000 units, respectively. How many input units are needed for produce component A, and how many units of component B should the firm buy?
A production process at Kenneth Day Manufacturing is shown in the figure below. The drilling operation occurs separately from, and simultaneously with, the sawing
and sanding, which are independent sequential operations. A product needs to go through only one of the three assembly operations (the operations are in parallel).
6 units/hr
Sawing
2.5 units/hr
Sanding
Drilling
1.8 units/hr
Welding
7 units/hr
Assembly
0.7 units/hr
Assembly
0.7 units/hr
Assembly
0.7 units/hr
Chapter B Solutions
Operations Management
Ch. B - Prob. 1DQCh. B - Prob. 2DQCh. B - Prob. 3DQCh. B - Prob. 4DQCh. B - Prob. 5DQCh. B - Prob. 6DQCh. B - Prob. 7DQCh. B - Prob. 8DQCh. B - Prob. 9DQCh. B - Prob. 10DQ
Ch. B - Prob. 11DQCh. B - Where a constraint crosses the vertical or...Ch. B - Prob. 13DQCh. B - Prob. 1PCh. B - Prob. 2PCh. B - Prob. 3PCh. B - B.4. Consider the following linear programming...Ch. B - Prob. 5PCh. B - Prob. 6PCh. B - Prob. 7PCh. B - Prob. 8PCh. B - Green Vehicle Inc. manufactures electric cars and...Ch. B - Prob. 10PCh. B - Prob. 11PCh. B - Prob. 12PCh. B - The LP relationships that follow were formulated...Ch. B - Prob. 14PCh. B - Prob. 15PCh. B - Prob. 16PCh. B - Prob. 17PCh. B - Prob. 18PCh. B - Prob. 19PCh. B - Prob. 20PCh. B - Prob. 21PCh. B - Prob. 22PCh. B - Prob. 23PCh. B - How many corner points are there in the feasible...Ch. B - Prob. 25PCh. B - Prob. 26PCh. B - A fertilizer manufacturer has to fulfill supply...Ch. B - Prob. 28PCh. B - Bowman Builders manufactures steel storage sheds...Ch. B - Prob. 30PCh. B - Quain Lawn and Garden, Inc Bill and Jeanne Quain...Ch. B - Quain Lawn and Garden, Inc Bill and Jeanne Quain...
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