Drew Rosen Automation Company estimates the data entry and verifying times for four jobs as follows:JOBADATA ENTRY (HOURS)VERIFY (HOURS)3.52.6B2.11.2с1.83.2D2.31.5In what order should the jobs be done if the company has one operator for each job?The order isChoose the correct graph of the time-phased flow of this job sequence.ОА.Job Entry TimeсAD B○ B.Job Entry TimeсHA○ C.3.2 5.09.311.613.7Job Verify TimeсADB3.2- Idle5.8 7.3 8.5Job Entry TimeсHAD B1.85.37.69.7Job Verify TimeB. DAс1.2 2.7- Idle7.911.1B1.8Job Verify TimeC5.37.69.7AD B3.25.87.3 8.5○ D.QсJob Entry TimeAD BH1.85.37.69.7Job Verify TimeсADB1.85.07.9 9.4 10.9- Idle

Answered: Drew Rosen Automation Company estimates…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Given the following information on job times and due dates. Job Job Time(Hours) Due Date(Hours) a 3.5 7 b 2.0 6 c 4.5 18 d 5.0 22 e 2.5 4 f 6.0 20 a-1. Determine the optimal processing sequence using (1) First come, first served, (2) Shortest processing time, (3) Earliest due date, and (4) Critical ratio. Sequence for First come, first served Sequence for Shortest processing time Sequence for Earliest due date Sequence for Critical ratio a-2. For each method, find the average job flow time and the average job tardiness. (Round your answers to 2 decimal places.) First Come, FirstServed Shortest ProcessingTime Earliest Due Date Critical Ratio Average flow time Average job tardiness
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.
As the Cottrell Bicycle Co. of St. Louis completes plans for its new assembly line, it identifies 25 different tasksin the production process. VP of Operations Jonathan Cottrell now faces the job of balancing the line. He lists precedencesand provides time estimates for each step based on work-sampling techniques. His goal is to produce 1,000 bicycles perstandard 40-hour workweek.Balance this operation using the shortest operation time rule and compute the efficiency of the line.
William Beebe owns a small shoe store. He has 10 pairs of shoes that requireresoling and polishing. He has a machine that can resole one pair of shoes at atime, and the time required for the operation varies with the type and condition of theshoe and the type of sole that is used. Shoes are polished on a machine dedi-cated tothis purpose as well, and polishing is always done after resoling. His assistant generally does the polishing while Mr. Beebe does the resoling. The resoling and polishingtimes (in minutes) are Shoes Resoling Time Polishing Time1 14 32 28 13 12 24 6 55 10 106 14 67 4 128 25 89 15 510 10 5In what order should the shoes be repaired in order to minimize the total makespanfor these 10 jobs?
An independent accountant is planning to prepare tax returns for six of her clients.Prior to her actually preparing each return, her secretary checks the client’s file to besure all the necessary documentation is there and obtains all the tax forms needed forthe preparation of the return. Based on past experience with the clients, her secretaryestimates that the following times (in hours) are required for preparation of the returnand for the accountant to complete the necessary paperwork prior to filing each return:Client Secretary Time Accountant Time1 1.2 2.52 1.6 4.53 2.0 2.04 1.5 6.05 3.1 5.06 0.5 1.5In what order should the work be completed in order to minimize the total timerequired for all six clients?
Currently a company that designs Web sites has six customers in its backlog. The time since the order arrived, processing time, and promised due dates are given in the following table. Job Time Since Order Arrived (days ago) Processing Time (days) Due Date (days from now) A 6 18 48 B 4 22 52 C 1 30 70 D 10 14 28 E 7 12 56 F 5 20 62 Develop a schedule by using the first-come, first-served (FCFS) rule and calculate the average flow time and average days past due for the schedule. Develop a schedule by using the earliest due date (EDD) rule and calculate the average flow time and average days past due for the schedule. Comment on the performance of the FCFS and EDD rules relative to average flow time and average days past due.
Given the following information on job times and due dates, determine the optimal processingsequence using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. For each method, find the average jobflow time and the average job tardiness. Jobs are listed in order of arrival.JobJob Time(hours)Due Date(hours)a 3.5 7b 2.0 6c 4.5 18d 5.0 22e 2.5 4f 6.0 20
Raquel’s Landscaping Company has contracted forseveral landscaping jobs. Each job requires preparing the areas(identifying the locations and types of plants, preparing the soil,etc.) and then planting the trees, bushes, and shrubs. Th e expectedtime for each of the jobs is shown next. (a) Using FCFS (fi rst come, fi rst served), assume the jobsarrive in the order shown (R, then S, then T, etc.). Showthe beginning and ending time for each job.(b) Calculate the makespan, the mean job fl ow time, and theaverage number of jobs in the system.
In the winter, Scott works four 10-hour days instead of five 8-hour days, so he has a long weekend every week. In this way, Scott takes advantage of a ________. Question 38 options: A) shared work week B) flextime work week C) new-age work week D) compressed work week E) enriched work week
A computer center has two identical computers for batch processing. Thecomputers are used as parallel processors. Job times are estimated by the user, but experience has shown that an exponential distribution gives an accurate description of the actual job times. Suppose that at a point in time there are eight jobs remaining to be processed with the following expected job times (expressed in minutes):Job 1 2 3 4 5 6 7 8Expected time 4 8 1 50 1 30 20 6a. In what sequence should the jobs be processed in order to minimize theexpected completion time of all eight jobs (i.e., the makespan)?b. Assume that computer A is occupied with a job that has exactly two minutes of processing time remaining and computer B is idle. If job times are deterministic, show the start and end times of each job on each computer using the sequence derived in part (a).
The times required to complete each of eight jobs in a two-machine flow shop are shown in thetable that follows. Each job must follow the same sequence, beginning with machine A and moving to machine B.a. Determine a sequence that will minimize makespan time.b. Construct a chart of the resulting sequence, and find machine B’s idle time. c. For the sequence determined in part a, how much would machine B’s idle time be reduced bysplitting the last two jobs in half?TIME (hours)Job Machine A Machine Ba 16 5b 3 13c 9 6d 8 7e 2 14f 12 4g 18 14h 20 11
We are analyzing the performance of four different machines, all subjected to the same workload. We have calculated the average Cycle Time (CT) and Work in Progress (WIP) for these machines. Which machine has the smallest effective variability? Machine 1: CT= 5 hours , WIP= 15 units Machine 2: CT= 10 hours , WIP= 30 units Machine 3: CT= 20 hours , WIP= 60 units Machine 4: CT= 40 hours , WIP= 120 units

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