Operations Management (McGraw-Hill Series in Operations and Decision Sciences)
12th Edition
ISBN: 9780078024108
Author: William J Stevenson
Publisher: McGraw-Hill Education
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Chapter 7, Problem 4P
Given these observed times (in minutes) for four elements of a job. Determine the observed time (OT) for each element. Note: The second element only occurs every-other cycle.
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Given these observed times (in minutes) for four elements of a job, determine the observed time (OT) for each element. Note: The second element only occurs every other cycle
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Processing time for eight projects, displayed in the sequence they arrived.
Project
P1
P2
P3
P4
P5
P6
P7
P8
Processing time (hours)
3
1
1
2
9
6
1
1.50
2. Given the projects displayed in table above, if FCFS is used to sequence the jobs, what is the average flow rate of the projects?
Note: Round your answer to 2 decimal places.
3. Given the projects displayed in table above, if FCFS is used to sequence the jobs, what is the average flow time of the projects?
Note: Round your answer to 1 decimal place.
4. Given the projects displayed in table above, if FCFS is used to sequence the jobs, what is the average inventory of the projects?
Note: Use your rounded answers from Parts 2 and 3. Round your answer to 1 decimal place.
5. Given the projects displayed in table above, if SPT is used to sequence the jobs, what is the average flow rate of the projects?
Note: Round your answer to 2 decimal places.
6. Given the projects displayed in table above, if SPT is used to sequence…
Chapter 7 Solutions
Operations Management (McGraw-Hill Series in Operations and Decision Sciences)
Ch. 7.S - Prob. 1DRQCh. 7.S - Prob. 2DRQCh. 7.S - Prob. 3DRQCh. 7.S - Prob. 4DRQCh. 7.S - Prob. 5DRQCh. 7.S - Prob. 6DRQCh. 7.S - Prob. 7DRQCh. 7.S - Prob. 8DRQCh. 7.S - Prob. 9DRQCh. 7.S - Prob. 10DRQ
Ch. 7.S - Prob. 1PCh. 7.S - Prob. 2PCh. 7.S - Prob. 3PCh. 7.S - Prob. 4PCh. 7.S - Prob. 5PCh. 7.S - Prob. 6PCh. 7.S - Prob. 7PCh. 7.S - Prob. 8PCh. 7.S - Prob. 9PCh. 7.S - Prob. 10PCh. 7.S - Prob. 11PCh. 7.S - Prob. 12PCh. 7.S - Prob. 13PCh. 7.S - Prob. 14PCh. 7.S - Prob. 15PCh. 7.S - Prob. 16PCh. 7.S - Prob. 17PCh. 7.S - Prob. 18PCh. 7.S - Prob. 19PCh. 7.S - Prob. 1CQCh. 7.S - Prob. 2CQCh. 7.S - Prob. 3CQCh. 7 - Prob. 1DRQCh. 7 - What are some of the main advantage and...Ch. 7 - Prob. 3DRQCh. 7 - Prob. 4DRQCh. 7 - Prob. 5DRQCh. 7 - Prob. 6DRQCh. 7 - Prob. 7DRQCh. 7 - What are motion study principles? How are they...Ch. 7 - Prob. 9DRQCh. 7 - Prob. 10DRQCh. 7 - Prob. 11DRQCh. 7 - Prob. 12DRQCh. 7 - Prob. 13DRQCh. 7 - Prob. 14DRQCh. 7 - Prob. 15DRQCh. 7 - Prob. 16DRQCh. 7 - Prob. 17DRQCh. 7 - Prob. 18DRQCh. 7 - Prob. 19DRQCh. 7 - Prob. 1TSCh. 7 - Prob. 2TSCh. 7 - Prob. 3TSCh. 7 - Prob. 1CTECh. 7 - Prob. 2CTECh. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Given these observed times (in minutes) for four...Ch. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - An analyst made the following observations about...Ch. 7 - Prob. 15PCh. 7 - Prob. 16PCh. 7 - Prob. 17PCh. 7 - Prob. 18PCh. 7 - Prob. 19PCh. 7 - Prob. 1CQCh. 7 - Prob. 2CQCh. 7 - Prob. 3CQCh. 7 - Prob. 4CQ
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- Drew Rosen Automation Company estimates the data entry and verifying times for four jobs as follows: In what order should the jobs be done if the company has one operator for each job? Illustrate the time-phased flow of this job sequence graphically.arrow_forwardThe owner of Touchdown Sports Bar wants to develop a time standard for the task of mixing a specialty cocktail. In a preliminary study, he observed one of his bartenders perform this task seven times with an average of 90 seconds and a standard deviation of five seconds. What is the standard time for this task if the bartender worked at a 20 percent faster pace than is average, and an allowance of 10 percent of job time is used?arrow_forwardFor a specific work element the standard time= 19.8 minutes, calculate the normal time in minutes assuming allowance= 16%arrow_forward
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- A foreman has determined the expected processing times at a machine for a set of jobs and now wants to sequence them. Given the following information, do the following: Job Time Due Date Job (days) (days) a 4.5 10 6.0 17 5.2 12 d. 1.6 27 e 2.8 18 f 3.3 19 a-1. Determine the processing sequence using (1) MST, (2) SPT, (3) EDD, and (4) CR. Rule Sequence a-с-b-е-f-d MST d-e-f-a-c-b SPT a-c-b-e-f-d EDD a-c-b-f-e-d O CR a-2. For each sequence, calculate the average days late, the average flow time, and the average WIP. (Do not round intermediate calculations. Round the final answers to 2 decimal places.) Rule Average lateness Average flow time Average WIP day (s) day (5) MST & EDD day(s) jobs day (s) jobs SPT day (s) day (s) jobs CR b. Which rule is best? SPT O has the lowest average flow time & average WIP, but EDD & MST have the lowest average days late.arrow_forwardThe normal time for a work cycle in a worker–machine system is 6.27 min. For setting the standard time, the PFD allowance factor is 12% and the machine allowance factor is 25%.The work cycle includes manual elements totaling a normal time of 5.92 min, all but 0.65 min of which are performed as internal elements. Determine (a) the standard time for the cycle and (b) the daily output at standard performance. (c) During an 8-hour shift, theworker lost 39 min due to personal time, rest breaks, and delays, and she produced 72 pieces. What was the worker’s pace on the operator-controlled portion of the shift?arrow_forwardA job has a normal time of 12 minutes, a performance rating of . 70 , and an allowance of 30 percent of job time. The standard time for this job in minutes is:arrow_forward
- The work cycle in a worker–machine system consists of (1) external manual work elements with a total normal time of 0.42 min, (2) a machine cycle with a machine time of 1.12 min, and (3) internal manual elements with a total normal time of 1.04 min. (a) Determine the standard time for the cycle, using a PFD allowance factor of 15% and a machine allowance factor of 30%. (b) How many work units are produced daily (8-hour shift) at standardperformance?arrow_forwardUsing the FCFS (first come, first served) decision rule for sequencing the jobs, the order is: Sequence 1 2 3 4 The total flow time for the sequence developed using the FCFS rule = decimal places). 5 The percentage utilization for the sequence developed using the FCFS rule = rounded to two decimal places). The average number of jobs in the system for the sequence developed using the FCFS rule = response to two decimal places). TL- The average tardiness (job lateness) for the sequence developed using the FCFS rule = to two decimal places). FALL:LL- /: I------ h Job Sequence 1 Using the EDD (earliest due date) decision rule for sequencing the jobs, the order is (to resolve a tie, use the order in which the jobs were received): 2 3 4 days (round your response to two 5 The total flow time for the sequence developed using the EDD rule = decimal places). % (enter your response as a percentage Job The average number of jobs in the system for the sequence developed using the EDD rule =…arrow_forwardOmar is the Head of IT Systems and Applications at AAA corporation. His job has been redesigned to includeshifting him between jobs at regular intervals. Specify the job design approach that is used in this case.arrow_forward
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