Cornerstones of Cost Management (Cornerstones Series)
Cornerstones of Cost Management (Cornerstones Series)
4th Edition
ISBN: 9781305970663
Author: Don R. Hansen, Maryanne M. Mowen
Publisher: Cengage Learning
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Chapter 20, Problem 29P

Pratt Company produces two replacement parts for a popular line of Blu-ray disc players: Part A and Part B. Part A is made up of two components, one manufactured internally and one purchased from external suppliers. Part B is made up of three components, one manufactured internally and two purchased from suppliers. The company has two processes: fabrication and assembly. In fabrication, the internally produced components are made. Each component takes 20 minutes to produce. In assembly, it takes 30 minutes to assemble the components for Part A and 40 minutes to assemble the components for Part B. Pratt Company operates one shift per day. Each process employs 100 workers who each work eight hours per day.

Part A earns a unit contribution margin of $20, and Part B earns a unit contribution margin of $24 (calculated as the difference between revenue and the cost of materials and energy). Pratt can sell all that it produces of either part. There are no other constraints. Pratt can add a second shift of either process. Although a second shift would work eight hours, there is no mandate that it employ the same number of workers. The labor cost per hour for fabrication is $15, and the labor cost per hour for assembly is $12.

Required:

  1. 1. Identify the constraints facing Pratt, and graph them. How many binding constraints are possible? What is Pratt’s optimal product mix? What daily contribution margin is produced by this mix?
  2. 2. What is the drummer constraint? How much excess capacity does the other constraint have? Assume that a 1.5-day buffer inventory is needed to deal with any production interruptions. Describe the drum-buffer-rope concept using the Pratt data to illustrate the process.
  3. 3. Explain why the use of local labor efficiency measures will not work in Pratt’s TOC environment.
  4. 4. Suppose Pratt decides to elevate the binding constraint by adding a second shift of 50 workers (labor rates are the same as those of the first shift). Would elevation of Pratt’s binding constraint improve its system performance? Explain with supporting computations.
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Chapter 20 Solutions

Cornerstones of Cost Management (Cornerstones Series)

Ch. 20 - What is a constraint? An internal constraint? An...Ch. 20 - Prob. 12DQCh. 20 - Prob. 13DQCh. 20 - Explain how lowering inventory produces better...Ch. 20 - Prob. 15DQCh. 20 - Thomas Corporation produces heating units. The...Ch. 20 - Sterling Corporation has an EOQ of 5,000 units....Ch. 20 - Patz Company produces two types of machine parts:...Ch. 20 - Prob. 4CECh. 20 - See Cornerstone Exercise 20.4. Fisher Company has...Ch. 20 - Ottis, Inc., uses 640,000 plastic housing units...Ch. 20 - Ottis, Inc., uses 640,000 plastic housing units...Ch. 20 - Melchar Company uses 78,125 pounds of oats each...Ch. 20 - Prob. 9ECh. 20 - Morrison Manufacturing produces casings for sewing...Ch. 20 - Morrison Manufacturing produces casings for sewing...Ch. 20 - Refer to Exercise 20.10. Assume the economic lot...Ch. 20 - Eyring Manufacturing produces a component used in...Ch. 20 - Hales Company produces a product that requires two...Ch. 20 - Many companies have viewed JIT as a panaceaa...Ch. 20 - Prob. 16ECh. 20 - Prob. 17ECh. 20 - Which of the following describes the economic...Ch. 20 - The economic order quantity (EOQ) for Part X15 is...Ch. 20 - A JIT inventory management system maintains which...Ch. 20 - For the theory of constraints, which of the...Ch. 20 - A dedicated pharmaceutical plant uses the theory...Ch. 20 - Prob. 23PCh. 20 - Burnett Company produces two types of gears: Model...Ch. 20 - Taylor Company produces two industrial cleansers...Ch. 20 - Prob. 26PCh. 20 - Calen Company manufactures and sells three...Ch. 20 - Confer Company produces two different metal...Ch. 20 - Pratt Company produces two replacement parts for a...Ch. 20 - Bountiful Manufacturing produces two types of bike...
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