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 10P
Today is day 4 of the planning cycle. Sequence the following jobs by FCFS, SPT, SLACK, and DDATE. Calculate the mean flow time and mean tardiness for each sequencing rule. Which rule would you recommend?
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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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- Given the data below, using the SPT heuristic sequencing rule, determine the completion date and tardiness for each job as well as the average completion time and average tardiness for all four jobs. Which of the following statements is true? Job Processing time (days) Due date (in days) A 10 10 B 5 8 C 15 25 D 8 15 a.Jobs B and D will have no tardiness b.The tardiness for Job A is 12 days c.The average tardiness is 19.75 d.The average completion time is 6.5arrow_forwardEight jobs have arrived in the following order: Job Processing Time Due Date 1 25 11 12 9 2 3 4 5 6 7 8 9 5 11 st 4 10 7 16 6 18 16 Find and compare the performance measures for the following sequencing rules using the Excel Sequencing template. Round your answers to two decimal places. A. Process in the order they have arrived 24 42 Average Flow Time Lateness Tardiness Average B. Shortest processing time The SPT sequence is 4, 2, 8, 6, 1, 5, 3, 7 Flow Time Lateness Tardiness Average Earliest due date The EDD sequence is 4, 2, 3, 8, 5, 6, 1, 7 Flow Time Lateness Tardinessarrow_forwardEight jobs have arrived in the following order: Job Processing Time Due Date 1 7 23 2 3 9 3 5 8 4 2 11 5 6 16 6 9 18 7 14 40 8 4 31 Find and compare the performance measures for the following sequencing rules using the Excel Sequencing template. Round your answers to two decimal places. Process in the order they have arrived Flow Time Lateness Tardiness Averagearrow_forward
- Job Processing Time Due Date (Di) 1 22 35 2 18 40 3 20 32 4 15 28 5 17 30 Compute the average flowtime and Average tardiness in the following sequences: SPT/SOT and EDD What sequencing rule do you recommend and why?arrow_forwardThe day when the order arrived, processing time, and promised due dates are given in the following table. The jobs are listed in the order of arrival. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average past due days. Make a comment.arrow_forwardA B1 B2 B3 C1 C2 C3 D1 D2 D3 E A service process is described by the above flowchart. After going through workstation A, an order needs to be processed by one of the three lines, B1-C1-D1, B2-C2-D2, or B3-C3-D3 (in other words, they are substitutable). Finally, all orders need to go through workstation E. The capacities of the individual workstations are given as follows: Workstation A has a capacity of 3 orders/hour • Workstation B1, B2, and B3 have the same capacity of 4 orders/hour • Workstation C1, C2, and C3 have the same capacity of 3 orders/hour • Workstation D1, D2, and D3 have the same capacity of 4 orders/hour • Workstation E has a capacity of 6 orders/hour What is process time of this service process in minutes?arrow_forward
- The first five columns of the following table contain information about a set of four jobs that just arrived (end of Hour 0 or beginning of Hour 1) at an engine lathe. They are the only ones now waiting to be processed. Several operations, including the one at the engine lathe, remain to be done on each job. Determine the schedule by using (a) the CR rule and (b) the S/RO rule. Compare these schedules to those generated by FCFS, SPT, and EDD. Job ProcessingTime at EngineLathe (hours) TimeRemainingUntil Due Date(days) Number ofOperationsRemaining Shop TimeRemaining(days) CR S/RO 1 2 3 4 2.3 10.5 6.2 15.6 15 10 20 8 10 2 12 5 6.1 7.8 14.5 10.2 2.46 1.28 1.38 0.78 0.89 1.10 0.46 -0.44arrow_forwardWhat does it mean for a process to be "starved" according to the priority scheduling method? What are some ways that this may be avoided?arrow_forwardKamauf Custom Glass, Inc., manufactures custom windows primarily for homes and churches. Small repair jobsmay take a few hours, but larger jobs may take hundreds ofhours. How to schedule the jobs is a continuing issue. The schedulerhas decided to see what insight can be gained by examiningsome common sequencing rules, namely FCFS, EDD, SPT, andLPT, on the criteria of average completion (flow) time, averagelateness, and average number of jobs in the system. Her sampleis the six jobs on the scheduler's desk Monday morning. Assumethat all jobs on the scheduler's desk arrived today (day 100, whichis a workday) in the order shown below. The estimated times tocomplete the jobs and their due dates are noted. a) Sequence the jobs according to the following decision rules:FCFS, EDD, SPT, and LPT.b) For the FCFS sequence, compute the average completion(flow) t ime, average lateness, and average number of…arrow_forward
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