6. (Ch10) Job A B C D E F Process Time (days) 2 8 4 10 5 12 Due Time (days) 7 16 4 17 15 18 Days Since Arrival 12 9 8 5 3 2 Use the information in the preceding table and sequence the six jobs using FCFS and EDD. The jobs are listed in the order of their arrival. Calculate the average flow time and average past due. It is now time zero.
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- 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?What are the advantages and disadvantages of the shortest processing time (SPT) rule?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. Calculate the Critical Ratios (CR): (Enter all responses rounded to two decimal places.) Job CR Job Due Date Duration (days) 103 103 214 10 205 205 223 309 309 217 11 412 219 412 517 216 15 517 Assume that all jobs arrived on day 180; today's date is 200.
- Dan's Auto Detailing business performs two major activities: exterior cleanup and interior detailing. Based on the size of car and condition, time estimates for six cars on Monday morning are as shown in the accompanying table. Car Number 1 5 6 Exterior Interior 55 75 4 65 35 50 60 45 90 35 40 a. Sequence the cars so that all exterior cleanup is done first and total completion time is minimized. The sequence is -Select-- -Select- -Select- -Select- -Select-- -Select- 2 3 80 20Given 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 20The data for five tax analysis jobs waiting to be processed by Martha at T. R. Accounting Service has been collected in the Microsoft Excel Online file below. Open the spreadsheet and perform the required analysis to answer the questions below. Questions 1. Use the shortest-processing-time (SPT) sequencing rules to sequence the jobs. Compute the flow time, tardiness, and lateness for each job, and the average flow time, average tardiness, and average lateness for all jobs. Use minus sign to enter negative lateness values, if any. Round the average values to two decimal places. Sequence Job Processing Time Due Date Flow Time Lateness Tardiness 1 2 3 4 5 Average 2. Use the earliest-due-date (EDD) sequencing rules to sequence the jobs. Compute the flow time, tardiness, and lateness for each job, and the average flow time, average tardiness, and average lateness for all jobs. Use minus…
- 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 tardinessThe first five columns of the following table contain information about a set of four jobs that just arrived (end of Hour 0 or beginning of Hour 1) at an engine lathe. They are the only ones now waiting to be processed. Several operations, including the one at the engine lathe, remain to be done on each job. Determine the schedule by using (a) the CR rule and (b) the S/RO rule. Compare these schedules to those generated by FCFS, SPT, and EDD. Job ProcessingTime at EngineLathe (hours) TimeRemainingUntil Due Date(days) Number ofOperationsRemaining Shop TimeRemaining(days) CR S/RO 1 2 3 4 2.3 10.5 6.2 15.6 15 10 20 8 10 2 12 5 6.1 7.8 14.5 10.2 2.46 1.28 1.38 0.78 0.89 1.10 0.46 -0.44At the campus copy shop, six jobs have arrived in the order shown (A, B, C, D, E, and F) at the beginning of the day 1 (today, which is a work day). All of the jobs are due at various times today. Your job is to evaluate four common sequencing rules. JOB DUE (IN HOURS) DURATION (HOURS REQUIRED) A 8 (this job is due in 8 hours) 1.65 B 5.5 (this job is due in 5.5 hours) 1.20 C 4.5 (this job is due after lunch in 4.5 hours) 0.85 D 6 (this job is due in 6…
- Given the data below, using the SPT heuristic sequencing rule, determine the completion date and tardiness for each job as well as the average completion time and average tardiness for all four jobs. Which of the following statements is true? Job Processing time (days) Due date (in days) A 10 10 B 5 8 C 15 25 D 8 15 a.Jobs B and D will have no tardiness b.The tardiness for Job A is 12 days c.The average tardiness is 19.75 d.The average completion time is 6.5SEE MORE QUESTIONS