KCourtney is a programmer receiving requests each week to analyze a large data base. Five jobs were on her deskMonday morning, and she must decide in what order to write the code. Assume that all jobs arrived today (day 1 andhour 1), in the order shown below. Courtney has assigned the number of hours required to do the coding as noted.Note that Courtney works an 8-hour day and today is a work day.JOBACDEDUE DATE (HOURSHENCE)1016143626DURATION (HOURSREQUIRED)63758a) Sequence the jobs according to EDD.According to the EDD rule, the sequence of jobs should be A, C, B, E, Db) What is the average completion (flow) time?The average completion (flow) time is days (round your response to one decimal place).

Answered: Courtney is a programmer receiving…

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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A Manufacturing Corp. with three-station work cell has the process displayed below. Each workstation has only one worker to the assigned activity. Single order arrives every 7.5 hours. c) What is the cycle time corresponding to maximum throughput and actual throughput?d) Suppose that a second parallel machine is added at station 2. What is the new bottleneck timeand new throughput time of the system? How did the addition of the second machine at workstation 2 affect the performance of the work cell?
Courtney is a programmer receiving requests each week to analyze a large database. Five jobs were on her desk Monday morning, and she must decide in what order to write thecode. Assume that a ll jobs arrived today (day I and hour I) in the order shown below. Courtney has assigned the number of hours required to do the coding as noted. Note that Courtney works an 8-hour day and today is a workday. a) Sequence the jobs according to EDD.b) What is the average completion (flow) time?c) What is the average job lateness?d) What is the average number of jobs in the system?
Joe's Twenty-four Seven Laundromat has the following jobs waiting to be processed. The first step of the process includes washing and drying the clothes; the second step is pressing the clothing. Joe wants to minimize the amount of time it takes to do all the jobs. The five jobs waiting to be processed are shown here. Job Wash andDry (hours) Press(hours) A 5 4 B 3 4 C 2 3 D 7 5 E 4 2 Wash and Dry Using FCFS, assume the jobs arrive in the order shown (A, then B, then C, etc.). Show the beginning time for each job and ending time for the whole process adding hours throughout the process. A -0 number of hours B-5 number of hours C-8 number of hours D-10 number of hours E-17 number of hours A B C D E 0 enter a number of hours enter a number of hours enter a number of hours enter a number of hours enter a number of hours enter a number of hours Press
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
Jane Reed bakes breads and cakes in her home for parties and other affairs on a contract basis. Jane has only one oven for baking. One particular Monday morning she finds that she has agreed to complete five jobs for that day. Her husband John will make the deliveries, which require about 15 minutes each. Suppose that she begins baking at 8:00 A.M. (given) Determine the sequence in which she should perform the jobs in order tominimizea. Mean flow time.b. Number of tardy jobs.c. Maximum lateness.
There are 5 students and one keg of beer at a wild andcrazy campus party. The time to draw a glass of beer followsan exponential distribution, with an average time of 2minutes. The time to drink a beer also follows an exponentialdistribution, with a mean of 18 minutes. After finishing abeer, each student immediately goes back to get anotherbeer.a On the average, how long does a student wait in linefor a beer?b What fraction of the time is the keg not in use?c If the keg holds 500 glasses of beer, how long, onthe average, will it take to finish the keg?
Eight 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 Average
Why does the theory of constraints advocate that a manager’s attention be directed tothe bottleneck of a process?a. It is useful to lower the utilization of the bottleneck.b. The bottleneck has considerable influence on the average flow rate of a process.c. It is important to minimize the buffer inventory in front of the bottleneck.d. First-come-first-served scheduling of jobs at the bottleneck ensures that all jobs havethe same expected waiting time before they are processed at the bottleneck.
Five jobs are waiting for processing through two work centers. Their processing time (in minutes) at each work center is contained in the table below. Each job requires work center Sigma before work center Delta. According to Johnson's rule, what sequence of jobs will minimize the completion time for all jobs? Job Sigma Delta R 20 10 S 25 30 T 30 20 U 35 35 V 15 25 Part 2 A. V−S−U−T−R B. V−R−U−S−T C. R−V−T−S−U D. S−U−T−V−R E. R−S−T−U−V
The following 5 overhaul jobs are waiting to be pro-cessed at Avianic’s Engine Repair Inc. These jobs were logged as they arrived. All dates are specified as planning calendar days.Assume that all jobs arrived on day 180; today’s date is 200.JOB DUE DATE REMAINING TIME (DAYS)103 214 10205 223 7309 217 11412 219 5517 217 15Using the critical ratio scheduling rule, in what sequence wouldthe jobs be processed?
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.
The following five overhaul jobs a re waiting to be processed at Avianic's Engine Repair Inc. These jobs were logged as they arrived. All dates are specified as planning calendar days.Assume that all jobs arrived on day 180; today's date is 200 Using the critical ratio scheduling rule, in what sequence would the jobs be processed?

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