Operations and Supply Chain Management 9th edition
9th Edition
ISBN: 9781119320975
Author: Roberta S. Russell, Bernard W. Taylor III
Publisher: WILEY
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Chapter 17, Problem 18P
Sassy U makes fashion jeans out of a variety of denim materials that differ in thickness, stiffness, drape, and weave. Customers receive a sampling of product in each type of material before final orders are placed. Each day, bolts of denim cloth received from suppliers wait their turn in the cutting department. The cutting sequence is developed from an algorithm called Johnson’s Rule which examines the time required for spreading the cloth on a cutting table (plus marking the pattern) and the time required for culling it into pattern pieces that will later be sewn together. These times can vary considerably due to number of pattern pieces, pattern placement (matching stripes, for example), cloth thickness, and whether the cutting is to be performed by hand (with an electric knife) or by a CNC textile-cutting machine.
- a. Given the time data below, determine the optimal sequence of denim cloth through the cutting room so that makespan is minimized.
- b. Map out the spreading and cutting processes on a Gantt chart and calculate the makespan.
- c. Using the sequence determined above, when will the stretch denim material leave the cutting room?
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Natura has to fill 7 orders for its clients. He requires placing the required product in work boxes and subsequently closing them properly so that the product reaches the customer correctly. The process consists of filling the box and later closing it. As the content of each box and the size of these is different, the filling and closing times of each order is different. These times are shown in the table below.
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a) Find the sequence to complete the orders in the shortest time possible. b) Using a Gantt chart, find the total time in which all orders will be completed using the sequence from part a.
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An enterprising student has set up an internship clearinghouse for business students. Each student who uses the service fills out a form and lists up to 10 companies that he or she would like to have contacted. The clearinghouse has a choice of two methods to use for processing the forms. The traditional method requires about 20 minutes to reviewthe form and arrange the information in the proper order for processing. Once this setup is done, it takes only two minutes per company requested to complete the processing. The other alternative uses an optical scan/retrieve system, which takes only a minute to prepare but requires five minutes per company for completing the processing. If it costsabout the same amount per minute for processing with either of the two methods, when should each be used? (Answer in Appendix D)
Chapter 17 Solutions
Operations and Supply Chain Management 9th edition
Ch. 17 - Scheduling Major League Baseball Umpires It used...Ch. 17 - Scheduling Major League Baseball Umpires It used...Ch. 17 - Solving Tough Scheduling Problems in Healthcare...Ch. 17 - Solving Tough Scheduling Problems in Healthcare...Ch. 17 - Analytics at Airbnb Airbnb is a global community...Ch. 17 - Analytics at Airbnb Airbnb is a global community...Ch. 17 - Analytics at Airbnb Airbnb is a global community...Ch. 17 - Analytics at Airbnb Airbnb is a global community...Ch. 17 - How do scheduling activities differ for projects,...Ch. 17 - Why is scheduling a job shop so difficult?
Ch. 17 - What three functions are typically performed by a...Ch. 17 - Prob. 4QCh. 17 - How can the success of a scheduling system be...Ch. 17 - Describe the process of loading and load leveling....Ch. 17 - What is the purpose of dispatch lists? How are...Ch. 17 - When should the following sequencing rules be...Ch. 17 - Give examples of sequencing rules you use to...Ch. 17 - What information is provided by the critical ratio...Ch. 17 - How are work packages, hot lists, and exception...Ch. 17 - What are Gantt charts, and why are they used so...Ch. 17 - Explain the concept behind input/output control....Ch. 17 - Explain the difference between infinite and finite...Ch. 17 - How does theory of constraints differ from...Ch. 17 - Explain the drum-buffer-rope concept.Ch. 17 - Discuss the similarities and differences between...Ch. 17 - What are some typical issues involved in employee...Ch. 17 - What quantitative techniques are available to help...Ch. 17 - At Valley Hospital, nurses beginning a new shift...Ch. 17 - Valley Hospital (from Problem 17.1) wants to focus...Ch. 17 - Prob. 3PCh. 17 - Sunshine House received a contract this year as a...Ch. 17 - Karina Nieto works for New Products Inc., and one...Ch. 17 - Decenture has four new IT hires available for...Ch. 17 - Blue Jeans Modeling Agency specializes in...Ch. 17 - Evan Schwartz has six jobs wailing to be processed...Ch. 17 - College students always have a lot of work to do,...Ch. 17 - Today is day 4 of the planning cycle. Sequence the...Ch. 17 - Alices Alterations has eight jobs to be completed...Ch. 17 - Jobs A. B, C, and D must be processed through the...Ch. 17 - Sequence the following jobs by (a) SPT, (b) DDATE,...Ch. 17 - Prob. 14PCh. 17 - Claims received by Healthwise Insurance Company...Ch. 17 - Jobs processed through Percys machine shop pass...Ch. 17 - Prob. 17PCh. 17 - Sassy U makes fashion jeans out of a variety of...Ch. 17 - Restore is a small repair shop that makes...Ch. 17 - Precision Painters, Inc., has five house painting...Ch. 17 - Tracy has six chapters on her desk that must be...Ch. 17 - Updike Upholstery cuts and sews fabric for custom...Ch. 17 - The following data have been compiled for an...Ch. 17 - The input/output report for Work Center 6 is as...Ch. 17 - Kim Johnson, R.N., the charge nurse of the...Ch. 17 - Rosemary Hanes needs help in scheduling volunteers...Ch. 17 - Schedule the wail staff at Vincents Restaurant...Ch. 17 - Mr. Baskins, manager of Tom and Jerrys Ice Cream...
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