Operations Management: Sustainability and Supply Chain Management (12th Edition)
Operations Management: Sustainability and Supply Chain Management (12th Edition)
12th Edition
ISBN: 9780134130422
Author: Jay Heizer, Barry Render, Chuck Munson
Publisher: PEARSON
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Chapter 9, Problem 24P

As the Cottrell Bicycle Co. of St. Louis completes plans for its new assembly line, it identifes 25 different tasks in the production process. VP of Operations Jonathan Cottrell now faces the job of balancing the line. He lists precedences and provides time estimates for each step based on work-sampling techniques. His goal is to produce 1,000 bicycles per standard 40-hour workweek.

Chapter 9, Problem 24P, As the Cottrell Bicycle Co. of St. Louis completes plans for its new assembly line, it identifes 25

  1. a. Balance this operation, using various heuristics. Which is best and why?
  2. b. What happens if the firm can change to a 41-hour workweek?
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A time study involving the preparation of hamburgers at Bill’s fast-food restaurant used the snap-back method to obtain the data (in minutes) shown below. Allowances typically constitute 15% of normal time.  The schedule calls for 300 hamburgers to be prepared during the lunch rush. If each part-time employee works 190 minutes per day, how many employees will be needed? Observation Work Element 1 2 3 4 5 t F RF NT 1.      Prepare Patty 0.45 0.41 0.50 0.48 0.36   1 0.9   2.      Cook First side 0.85 0.81 0.77 0.89 0.83   1 1.2   3.      Flip, press, and cook the other side 0.60 0.55 0.59 0.58 0.63   1 1.2   4.      Assemble 0.31 0.24 0.27 0.26 0.32   1 1.0   Show work
Kiko Teddy Bear is a manufacturer of stuffed teddy bears. Kiko would like to be able to produce 40teddy bears per hour on its assembly line. The following information will assist in answering thequestions that follow: Task Information for Kiko Teddy Bear Work Element     Task Description                    ImmediatePredecessor             Task Time (inseconds)A                              Cut teddy bear pattern         None                                                   90B                             Sew teddy bear cloth             A                                                          75C                             Stuff teddy bear                       B                                                           50D                            Glue on eyes                               C                                                           20E                            Glue on nose                               C…
Kiko Teddy Bear is a manufacturer of stuffed teddy bears. Kiko would like to be able to produce 40teddy bears per hour on its assembly line. The following information will assist in answering thequestions that follow: Task Information for Kiko Teddy Bear Work Element     Task Description                    ImmediatePredecessor             Task Time (inseconds)A                              Cut teddy bear pattern         None                                                   90B                             Sew teddy bear cloth             A                                                          75C                             Stuff teddy bear                       B                                                           50D                            Glue on eyes                               C                                                           20E                            Glue on nose                               C…

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Operations Management: Sustainability and Supply Chain Management (12th Edition)

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