Answered: Job Processing Time Due Date A B с D 12…

Business

Operations Management

Job Processing Time Due Date A B с D 12 LC 5 8 21 ECO 6 15 19 12 45 25 FOS 9 35

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 critical resource in a manufacturing operation experiences a very high traffic intensity during the shop’s busiest periods. During these periods the arrival rate is approximately 57 jobs per hour. Job processing times are approximately exponentiallydistributed with mean 1 minute.a. Compute the expected flow time in the system assuming an FCFS processingdiscipline, and the expected flow time under SPT using Figure 9–13
What are the benefits and drawbacks of the shortest processing time rule (SPT)?
K Courtney is a programmer receiving requests each week to analyze a large data base. Five jobs were on her desk Monday morning, and she must decide in what order to write the code. Assume that all jobs arrived today (day 1 and hour 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. JOB A C D E DUE DATE (HOURS HENCE) 10 16 14 36 26 DURATION (HOURS REQUIRED) 6 3758 a) Sequence the jobs according to EDD. According to the EDD rule, the sequence of jobs should be A, C, B, E, D b) What is the average completion (flow) time? The average completion (flow) time is days (round your response to one decimal place).
Courtney is a programmer receiving requests each week to analyze a large data base. Five jobs were on her desk Monday morning, and she must decide in what order to write the code. Assume that all jobs arrived today (day 1 and hour 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. DURATION (HOURS REQUIRED) 14 7 2 JOB ABCDE DUE DATE (HOURS HENCE) 36 14 16 6 26 6 10 a) Sequence the jobs according to EDD. According to the EDD rule, the sequence of jobs should be D, B, C, E, A. b) What is the average completion (flow) time? The average completion (flow) time is 19.6 days (round your response to one decimal place). c) What is the average job lateness? The average job lateness is 0.6 days (round your response to one decimal place). d) What is the average number of jobs in the system? The average number of jobs in the system is jobs (round your response to one decimal…
The following jobs are waiting to be processed atJeremy LaMontagne’s machine center. Today is day 250. Using the critical ratio scheduling rule, in what sequencewould the jobs be processed?
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. 2 3 4 Job (fix machine #) Processing time (hours) 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. 1 NO † 4 5 6 Sequence -Seled- Average flow time (FCFS rule): -Select- Y -Select- -Select- V FCFS Rule -Select- Y 7 1 Flow Time (hours) SPT rule Flow Time (hours) hours Average flow time (SPT rule): hours -Select- ✔ minimizes flow time and gets the most work done in the least amount of time.
Answer C only. Tim Woods, a recent GMU MBA grad and serial entrepreneur, has opened Pets-R-awesOMe, an online pet store. He and his team are experimenting with call center staffing. A. The current call center format has two lines: one for customers who want to place an order and one for customers who want to report a problem. Each line is served by one specialized customer service representative. The call center is staffed so that at any given time, there is one representative taking customer orders and one representative addressing customer problems. On average, there is a new customer who wants to place an order every two minutes, exponentially distributed. Similarly, there is a new customer needing to address a problem every two minutes, exponentially distributed. The call center staffers are fast and can on average complete one call of either type in 75 seconds, with a standard deviation of 30 seconds. Each call center staff member is paid $15 per hour. The estimated cost of a…
An architect has five projects to complete. She estimates that three of the projects willrequire one week to complete and the other two will require three weeks and four weeks.During the time these projects are completed (and assuming no other projects areworked on during this time), what is the architect’s flow rate (projects per week)?
What is the answer
Five customers brought in computers to be repaired to a small shop. Estimated repair times (in days) and dates promised are given below. Due dates were set based on available technicians; however, one technician had a medical emergency and will be unavailable for at least two weeks so processing times were adjusted. Customer job 1 Processing time (days) Due date (days) 6 Use the EDD rule and compute the start time, flow time, lateness, and tardiness for each job. Use minus sign to enter negative lateness values, if any. If your answer is zero, enter "0". Sequence Start Time, days Flow Time, days Lateness, days Tardiness, days -Select- -Select- -Sclect. -Select- -Select- UI 5 LI TE 10 MA
Short question 4- Leo manages a receiving station for rice. Farmers deliver their loads of rice with a rate of 150 tons per hour from 6:00 am to 2:00 pm. Leo can process them at a rate of 100 tons an hour. The station has room to hold only 200 tons of rice in inventory prior to processing. Once this space is filled, the farmers’ trucks must wait to dump their contents. Leo is considering using seasonal workers to help him with the processing of rice loads. When the seasonal workers are working, the processing rate increases to 125 tons per hour. The seasonal workers would start working at 10:00 am and finish working when the trucks stop waiting. At what time, Leo will finish processing loads of rice using these seasonal workers?
Three jobs are in the queue. The number of tickets each has and the number of seconds of processing time each requires are shown in Table 2. Assume that quanta of CPU time are sufficiently small, and that no other processes get any tickets before the last of these processes complete. For the following questions, please circle the correct answer from the candidate list. Table 2 Using lottery scheduling algorithm, Job # Tickets CPU time turnaround time for Job 1 is 30 10 (a) 20 (b) 25 (c) 30 (d) 35 2 30 15 turnaround time for Job 2 is (a) 20 (b) 25 (c) 30 (d) 35 3 40 10 turnaround time for Job 3 is (a) 20 (b) 25 (c) 30 (d) 35 average turnaround time is (a) 20 (b) 25 (c) 30 (d) 35 When using lottery scheduling algorithm, what is the turnaround time for Job 1, Job 2, and Job 3? And what is the average turnaround time? 1.