The following six jobs are to be scheduled on a single machine:Job123Processing time 70 160 220(min.)a. Suppose the jobs are processed in FCFS numerical order. Compute the makespan, flow time for each job, and overall average flow time. Roundyour answers to the nearest whole number.Job Flow Time (min)123st4564 5 690 130 110minutesMakespan:Average flow time:minutesb. In what order would the jobs be processed using the SPT rule?The SPT sequence is -Select--Select--Select---Select- ✓ -Select--Select-Compute the average flow time after each job is completed. Round your answer to the nearest whole number.Average flow time:minutes

JOBPROCESSING TIME1702903110413051606220

Answered: Job Flow Time (min) 1 2 3 4 5 6 minutes…

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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The following six jobs are to be scheduled on a single machine: Job 1 2 3 4 5 6 Processing time (min.) 110 120 220 90 180 80 Suppose the jobs are processed in FCFS numerical order. Compute the makespan, flow time for each job, and overall average flow time. Round your answers to the nearest whole number. Job Flow Time (min) 1 2 3 4 5 6 Makespan: minutes Average flow time: minutes In what order would the jobs be processed using the SPT rule? The SPT sequence is - - - - - . Compute the average flow time after each job is completed. Round your answer to the nearest whole number. Average flow time: minutes Compare this answer with your answer to part a. The minimizes flow time and gets the most work done in the least amount of time.
At an auto shop, six jobs are currently in queue. Job A B C D E F Arrival order 1 2 3 4 5 6 Processing time (minutes) 33 27 36 28 21 23 Using the shortest processing time scheduling approach, what is the average inventory of jobs in the system? Assume that processing of jobs will start immediately. Note: Round your answer to 2 decimal places.
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
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 Alpha before work center Beta. According to Johnson's rule, which job should be scheduled first in the sequence? O A. V OB. U O C. R OD. S O E. T Job R S T Alpha 20 23 50 26 55 Beta 34 35 20 26 75
AssumMe a customer orders a product online. SupPpose that the product is delivered later in the weEek. The time between the order placement and order delivery is known as: a. waitT time b. queue time c. cycle time d. process time
Diablo Electronics manufactures four unique products (A, B, C, and D) that are fabricated and assembledin five different workstations (V, W, X, Y, and Z) using a small batch process. Each workstation is staffedby a worker who is dedicated to work a single shift per day at an assigned workstation. Batch setuptimes have been reduced to such an extent that they can be considered negligible. A flowchart denotesthe path each product follows through the manufacturing process as shown in Figure 5.2, where eachproduct’s price, demand per week, and processing times per unit are indicated as well. Inverted trianglesrepresent purchased parts and raw materials consumed per unit at different workstations. Diablo canmake and sell up to the limit of its demand per week, and no penalties are incurred for not being able tomeet all the demand.Which of the five workstations (V, W, X, Y, or Z) has the highest utilization, and thus serves as the bottle-neck for Diablo Electronics?
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
To control queue and make deadlines, two things are essential: must schedule and plan carefully , what are these ?
Consider a workstation that has one maintenance mechanic to repair failed machines. We can think of the mechanic as the processor (scarce resource) and the machines awaiting repair as the jobs. Let us assume that six machines are down, with estimated repair times given here, and that no new machines fail. 1 2 3 Job (fix machine #) Processing time 10 (hours) Job 1 2 3 4 5 6 2 Compute the flow time for each job using both the FCFS rule and the SPT rule, and compare the average flow times. Round your answers for average values to the nearest whole number. FCFS Rule 9 Flow Time (hours) Average flow time (FCFS rule): 4 5 6 1 8 6 hours
state whether or not each situation would be considered “compensable time” (and why or why not). An employee of a fast food chain has to arrive at work 15 minutes early to change into the“mascot” costume and it typically takes another 15 minutes at the end of the shift to change outof the costume and properly store it. Due to the cost of the costume, employees are notallowed to take the costume home. The “mascots” typically work from 10am – 2pm, to coverthe lunch rush periods. How much time would be “compensable” for the mascots, assumingthe conditions/schedule listed above?2) George is a Radiology Technician at a local hospital and when on call, is required to be nofurther than 30 minutes away from the facility. Is the “on call” time, compensable?
Calculate the Critical Ratios (CR): (Enter all responses rounded to two decimal places.) The following 5 overhaul jobs are 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. Job CR 103 Job Due Date Duration (days) 103 214 10 205 223 7 309 217 11 412 219 5 517 217 15 Assume that all jobs arrived on day 180; today's date is 200.
Calculate the Critical Ratios (CR): (Enter all responses rounded to two decimal places.) The following jobs are waiting to be processed at Jeremy LaMontagne's machine center. Today is day 245. Job Date Job Received Due Date Duration (days) 1 215 300 30 2 230 310 25 3 228 290 35 4 235 305 40 5 245 315 45

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