Three jobs are to be scheduled on two machines A and B. Assume that the jobs are processed in the sequence A-B. The processing times are: Job A 1 2 3 5 7 3 B 4 7 5
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uestion 2:
ID:_________________________
Three jobs are to be scheduled on two machines A and B. Assume that the jobs are processed in the sequence A-B. The processing times are: Job
A
1 2 3
5 7 3
B
4 7 5
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- WorkPro is a small manufacturer. It uses a job process for production. The following sample of jobs are listed in the order that they were received. Job Due Date Operation Time P 5 1 Q 20 8 R 8 5 S 11 6 T 3 12 When the shortest operating time (SOT) rule is applied to the sample of jobs, the resulting sequence is: A. Choos the following answer choice. T, P, R, S, Q R, S, T, P, Q P, Q, R, S, T P, R, S, Q, T B. In the WorkPro example above, average flow time for the sample of jobs when sequenced by the shortest operating time (SOT) rule is approximately: 19.8 14.2 4.8 6.4 C. In the WorkPro example above, average lateness for the sample of jobs when sequenced by the earliest due date (EDD) rule is approximately: Group of answer choices 10.4 4.8 7.8 5.8 D. Using the sample of jobs in the WorkPro example above, the shortest operating time (SOT) rule appears more attractive than the earliest due date (EDD) rule…Use the S/O rule to schedule the following jobs. Note that processing time includes the timeremaining for the current and subsequent operations. In addition, you will need to know thenumber of operations remaining, including the current one.JobRemainingProcessingTimeDueDateRemainingNumber ofOperationsA 4 14 3B 16 32 6C 8 8 5D 20 34 2E 10 30 4F 18 30 2The following jobs are waiting to be processed at JulieMorel’s machine center:JOB DATE ORDER RECEIVED PRODUCTIONDAYS NEEDED DATE ORDER DUEA 110 20 180B 120 30 200C 122 10 175D 125 16 230E 130 18 210 In what sequence would the jobs be ranked according to the fol-lowing rules: (a) FCFS, (b) EDD, (c) SPT, and (d) LPT? All dates are according to shop calendar days. Today on the planning cal-endar is day 130, and none of the jobs have been started or sched-uled. Which rule is best?
- 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 20K The following jobs are waiting to be processed at a small machine center: JOB 10 20 30 40 50 DUE DATE DURATION (DAYS) 260 256 260 265 275 28 12 8 18 22 All dates are specified as manufacturing planning calendar days. Assume that all jobs arrived on day 200 (yesterday) in the order shown but are not scheduled to begin until day 201 (today). a) Sequence the jobs according to LPT. According to the LPT rule, the sequence of jobs should be 10, 50, 40, 20, 30 b) What is the average completion (flow) time? The average completion (flow) time is 62.8 days (round your response to one decimal place). c) What is the average job lateness? The average job lateness is 4 days (round your response to one decimal place).TABLE 18.21 Processing Time for Eight Projects, Displayed in the Sequence They Arrived Project P1 P2 P3 Р4 P5 P6 P7 P8 Processing time (hours) 4 1 0.5 2 3 6 1 ..... 1. Given the projects displayed in Table 18.21, if FCFS is used to sequence the jobs, what is the average flow time of the projects (in hours)? 2. Given the projects displayed in Table 18.21, if SPT is used to sequence the jobs, what is the average flow time of the projects (in hours)?
- A machine center in a job shop for a local fabrication company has five unprocessed jobs remaining at a particular point in time. The jobs are labeled A, B, C, D, and E in the order that they entered the shop. The respective processing times and due dates are given in the table below. What is the sequence the of jobs by CR rules? Job Processing Time Due Date A 10 32 B. 55 34 C. 11 31 60 35The following six jobs are to be scheduled on a single machine: Job 1 2 3 Processing 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. Round your answers to the nearest whole number. Job Flow Time (min) 1 2 3 st 4 5 6 4 5 6 90 130 110 minutes Makespan: Average flow time: minutes b. 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: minutesAt 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…
- 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.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 20A production line is to be designed for a job with four tasks. The task times are 2.7 minutes, 0.4 minutes, 0.6 minutes, and 2.7 minutes. After line minutes, and the smallest possible assigned cycle time is minutes. (Round balancing, the largest possible assigned cycle time is answers to one decimal place.) OA. 6.4, 2.7 OB. 3.1, 2.3 OC. 1.6, 0.6 OD. 2.7, 0.4 OE. 6.0, 1.6