2. Six jobs must be processed through machine A and then machine B as shown below. The processing time for each job is also shown. Job 1 2 3 4 5 6 A 10 6 7 8 3 6 Machine (minutes) a. Develop a Gantt chart to determine the total time required to process all six jobs. Use the following sequence of jobs: 1, 2, 3, 4, 5, 6. b. Can you develop a better sequence to reduce the total time required for processing? B & ܘ ܂ ܗ ܟ ܗ ܩ ܘ 8

2. Six jobs must be processed through machine A and then machine B as shown below. The processing time for each job is also shown. Job 1 2 3 4 5 6 A 10 6 7 8 3 6 Machine (minutes) a. Develop a Gantt chart to determine the total time required to process all six jobs. Use the following sequence of jobs: 1, 2, 3, 4, 5, 6. b. Can you develop a better sequence to reduce the total time required for processing? B & ܘ ܂ ܗ ܟ ܗ ܩ ܘ 8

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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Six jobs must be processed through machine A and then machine B as shown below. The processing time for each job is also shown.a. Develop a Gantt chart to determine the total time required to process all six jobs. Use the following sequence of jobs: 1, 2, 3, 4, 5, 6.b. Can you develop a better sequence to reduce the total time required for processing?
1. A production department of a textile firm received six different orders this week. They have calculated the processing time presented as a table (below). They have also put the due dates for each job. Job A с E B D F Process. Time 2 4 5 8 10 12 Due Date 7 4 15 16 17 18 Based on the table please provide four sequences to complete the jobs: a) Using first come first served (FCFS) assuming the letters represent the order they arrive (A first, B next, then C, etc..) b) Using shortest processing time c) Using longest processing time d) Using due dates Calculate "average completion time", "average number of jobs in the system" and "average job lateness" for all the sequences you have generated above.
A foreman has determined the expected processing times at a machine for a set of jobs and now wants to sequence them. Given the following information, do the following: Job Time Due Date Job (days) (days) a 4.5 10 6.0 17 5.2 12 d. 1.6 27 e 2.8 18 f 3.3 19 a-1. Determine the processing sequence using (1) MST, (2) SPT, (3) EDD, and (4) CR. Rule Sequence a-с-b-е-f-d MST d-e-f-a-c-b SPT a-c-b-e-f-d EDD a-c-b-f-e-d O CR a-2. For each sequence, calculate the average days late, the average flow time, and the average WIP. (Do not round intermediate calculations. Round the final answers to 2 decimal places.) Rule Average lateness Average flow time Average WIP day (s) day (5) MST & EDD day(s) jobs day (s) jobs SPT day (s) day (s) jobs CR b. Which rule is best? SPT O has the lowest average flow time & average WIP, but EDD & MST have the lowest average days late.
17-13. Jobs processed through Percy's machine shop pass through three operations: milling, grinding, and turning. The hours required for each of these operations is as follows: Job Milling Grinding Turning A 5 1 4 B 2 2 5 C 3 2 1 D 1 3 E 1 2 Sequence the job by (a) FCFS and (b) shortest processing time (SPT). Make a Gantt chart for each machine and each rule. Which sequencing rule would you recommend?
Processing time for eight projects, displayed in the sequence they arrived. Project P1 P2 P3 P4 P5 P6 P7 P8 Processing time (hours) 3 1 1 2 9 6 1 1.50 2. Given the projects displayed in table above, if FCFS is used to sequence the jobs, what is the average flow rate of the projects? Note: Round your answer to 2 decimal places. 3. Given the projects displayed in table above, if FCFS is used to sequence the jobs, what is the average flow time of the projects? Note: Round your answer to 1 decimal place. 4. Given the projects displayed in table above, if FCFS is used to sequence the jobs, what is the average inventory of the projects? Note: Use your rounded answers from Parts 2 and 3. Round your answer to 1 decimal place. 5. Given the projects displayed in table above, if SPT is used to sequence the jobs, what is the average flow rate of the projects? Note: Round your answer to 2 decimal places. 6. Given the projects displayed in table above, if SPT is used to sequence…
Omar is the Head of IT Systems and Applications at AAA corporation. His job has been redesigned to includeshifting him between jobs at regular intervals. Specify the job design approach that is used in this case.
Drew Rosen Automation Company estimates the data entry and verifying times for four jobs as follows: In what order should the jobs be done if the company has one operator for each job? The order is Choose the correct graph of the time-phased flow of this job sequence. O A. O C. Job Entry Time A 2.0 Job Verify Time S 2.0 - Idle B Job Entry Time A 3.4 3.4 5.4 - Idle A Job Verify Time A B 5.6 5.4 C B B 199 5.8 7.2 8.2 D 11 7.9 9.5 D 194 8.0 9.4 10.5 C D 111 9.4 11.7 13.3 Q ✔ Q JOB ABCD DATA ENTRY (HOURS) 2.0 3.6 2.3 1.6 B. O D. VERIFY (HOURS) 3.4 2.4 1.4 1.0 Job Entry Time A H 2.0 Job Verify Time A ㅏ Job Entry Time A H 2.0 Job Verify Time D, C H 3.4 1.0 2.4 B - Idle B B 5.6 C 5.6 4 C, D 5.8 7.2 8.2 C 7.9 B 7.9 8.0 D D 9.5 9.5 A 11.4 Q G Q
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
Pls help with below homwork -) We are used to make utilization of logical sequence of tasks for the efficient performance of a job. Why do we need the behavioral approach; isn’t the rational approach sufficient ?
A bank's mortgage department must process the following six jobs to maximize client satisfaction. Processing Time (days) Due Date 46 19 77 Mortgage 1 2 17 7 19 13 28 24 39 20 64 What sequencing rule should you use? For the rule you selected, find the best sequence using the Excel Sequencing template. The most appropriate sequence rule is -Select- The best sequence is -Select-- -Select-- 3 4 5 6 -Select- ✓ -Select-- -Select-- -Select-
A company needs to design an assembly line to produce portable electric generators. They plan to use the assembly-line 6 hours each day to produce 2160 generators daily. The following table describes the tasks involved in the assembly of portable electric generator: IMMEDIATE TASK PREDECESSORS TIME (seconds) ==== =========== ============== a none 3 b none 5 c a,b 6 d none 7 e c,d 9 Use the Longest Processing Time Rule (LPT) to design this assembly line. How many workstations are required by your design?…
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 20