Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 14, Problem 23P
Summary Introduction
Interpretation:
Type of job which is late.
Concept Introduction: A critical ratio is used to check whether the task assigned will be done on stipulated time or not. It helps in analyzing the
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Using the FCFS rule for scheduling, the sequence is 1-2-3
For the schedule developed using the FCFS rule, the total length of time taken to
complete the three suits (including delivery) : hours (enter your response as a
whole number).
=
G
Sunny Park Tailors has been asked to make three different types of wedding suits
for separate customers. The table below highlights the time taken in hours for
cutting and sewing (process 1) and delivery (process 2) of each of the suits.
Times Taken for Different Activities (hours)
Cut and Sew
3
5
6
Suit
1
2
7
3
Deliver
4
2
∞ N
8
Assume that orders for suits have been listed in the above table in the order in
which they were received.
The owner/operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received:
Job
processing time
hrs due from now
W
4
4
X
3
5
Y
2
2
Z
1
1
If he uses the earliest due date first priority rule to schedule these jobs, what will be the average job tardiness?
Five jobs are planned to be scheduled. Each of the jobs must be processed on three
machines (A, B, and C) in the same order. The processing times are listed below. Use
Johnson's Rule to determine the optimal sequence of jobs.
Job
B
16
10
11
10
14
20
12
3
10
8
4
1
O a) 3-1-2-4-5
O b) Johnson's Rule is not an Optimal Technique
O c) 1-2-3-4-5
O d) 5-4-3-1-2
O e) 5-4-3-2-1
O) 5-4-2-1-3
O e) 5-4-2-3-1
2345
Chapter 14 Solutions
Practical Operations Management
Ch. 14 - Prob. 1DQCh. 14 - Prob. 2DQCh. 14 - Prob. 3DQCh. 14 - Prob. 4DQCh. 14 - Prob. 5DQCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - Prob. 3PCh. 14 - Prob. 4PCh. 14 - Prob. 6P
Ch. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10PCh. 14 - Prob. 11PCh. 14 - Prob. 12PCh. 14 - Prob. 13PCh. 14 - Prob. 14PCh. 14 - Prob. 15PCh. 14 - Prob. 16PCh. 14 - Prob. 17PCh. 14 - Prob. 18PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - Prob. 23PCh. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 26PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 1.1QCh. 14 - Prob. 1.2QCh. 14 - Prob. 1.3QCh. 14 - Prob. 1.4Q
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- Ron Satterfield's excavation company uses both Gantt scheduling charts and Gantt load charts. Today, which is the end of day 7, Ron is reviewing the Gantt chart depicting these schedules: Day Job #151 was scheduled to begin on day 3 and to take 6 days. It got started on time and is 1 day ahead of schedule. Job #177 was scheduled to begin on day 1 and take 4 days. It is currently on time. Job #179 was scheduled to start on day 7 and take 2 days. It actually got started on day 6 and is progressing according to plan. Job #211 was scheduled to begin on day 5, but missing equipment delayed it until day 6. It is progressing as expected and should take 3 days. Job #215 was scheduled to begin on day 4 and take 5 days. It got started on time but has since fallen behind 2 days. Job 12 3 4 56 789 10 11 -- 151 177 + This exercise contains only part a. 179 a) Add the actual progress to the Gantt schedule shown on the right (on which the planned timings have been already plotted). Using the line…arrow_forwardUsing the FCFS rule for scheduling, the sequence is 1-2-3 For the schedule developed using the FCFS rule, the total length of time taken to complete the three suits (including delivery)= 22 hours (enter your response as a whole number). Using Johnson's rule for 2-machine scheduling, the sequence is 3-2-1 For the schedule developed using the Johnson's rule, the total length of time taken to complete the three suits (including delivery)= hours (enter your response as a whole number). D Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The table below highlights the time taken in hours for cutting and sewing (process 1) and delivery (process 2) of each of the suits Times Taken for Different Activities (hours) Cut and Sew Suit 1 2 3 5 Deliver 2 3 6 D Assume that orders for suits have been listed in the above table in the order in which they were received.arrow_forwardA 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 35arrow_forward
- Ron Satterfield's excavation company uses both Gantt scheduling charts and Gantt load charts. Today, which is the end of day 7, Ron is reviewing the Gantt chart depicting these schedules: Job #151 was scheduled to begin on day 3 and to take 7 days. It got started on time and is 1 day ahead of schedule. Job #177 was scheduled to begin on day 3 and take 5 days. It is currently on time. Job #179 was scheduled to start on day 6 and take 3 days. It actually got started on day 5 and is progressing according to plan. Job #211 was scheduled to begin on day 5, but missing equipment delayed it until day 6. It is progressing as expected and should take 3 days. Job #215 was scheduled to begin on day 4 and take 5 days. It got started on time but has since fallen behind 2 days. This exercise contains only part a. a) Add the actual progress to the Gantt schedule shown on the right (on which the planned timings have been already plotted as blue lines). Using the line drawing tool, plot the actual…arrow_forwardAn 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?arrow_forwardDe Law Construction has a gotten some construction jobs to build some starter housing units in a few areas. The building time for each housing unit to be completed as well as the date that each unit is to be completed is shown in the table below. Today is Day 471. Which of the sequences, EDD OR SPT should the company use to sequence the order in which they do the jobs, assuming that because of resource constraints it cannot do the jobs simultaneously? HOUSING UNIT Building Time (days) Due Date Marabella 39 Day 502 Tabaquite 23 Day 528 San Juan 30 Day 515 Mayaro 33 Day 498 D’Abadie 41 Day 535 Preysal 40 Day 510 Some time after starting the jobs according to the sequence you decided on, it was found that because of inclement weather the last three housing units in the sequence have been delayed. You now have to prioritise and decide in which order to expedite those three jobs, using the Critical Ratio model. It is now…arrow_forward
- Ron Satterfield's excavation company uses both Ganit scheduling charts and Gantt load charts. Today, which is the end of day 7, Ron is reviewing the Gantt chart depicting these schedules: Job #151 was scheduled to begin on day 3 and to take 5 days. It got started on time and is 1 day ahead of schedule. Job #177 was scheduled to begin on day 1 and take 4 days. It is currently on time. Job #179 was scheduled to start on day 6 and take 2 days. It actually got started on day 5 and is progressing according to plan. Job #211 was scheduled to begin on day 5, but missing equipment delayed it until day 6. It is progressing as expected and should take 3 days. Job #215 was scheduled to begin on day 5 and take 5 days. It got started on time but has since fallen behind 1 day. This exercise contains only part a a) Add the actual progress to the Gantt schedule shown on the right (on which the planned timings have been already plotted as blue lines). Using the line drawing tool, plot the actual…arrow_forwarda) Using the FCFS (first come, first served) decision rule for sequencing the jobs, the order is (assume that jobs came in the order in which they are listed in the table): Sequence Job 1 A D A C B Part 2 2 B B C D A Part 3 3 C A D C B Part 4 4 D A C B D Part 5 The average tardiness (job lateness) for the sequence developed using the FCFS rule = enter your response here days (round your response to two decimal places). Part 6 The average completion time (flow time) for the sequence developed using the FCFS rule = enter your response here days (round your response to two decimal places). Part 7 The percentage utilization for the sequence developed using the FCFS rule = enter your response here% (enter your response as a percentage rounded to two decimal places). Part 8 b) Using the SPT (shortest processing time) decision rule for sequencing the jobs, the order is (to resolve a tie,…arrow_forwardUsing the FCFS rule for scheduling, the sequence is 1-2-3 For the schedule developed using the FCFS rule, the total length of time taken to complete the three suits (including delivery)= hours (enter your response as a whole number). Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The table below highlights the time taken in hours for cutting and sewing (process 1) and delivery (process 2) of each of the suits. Times Taken for Different Activities (hours) Deliver Suit Cut and Sew 1 2 Assume that orders for suits have been listed in the above table in the order in which they were receivedarrow_forward
- Processing times and due dates for five jobs are shown in the table below. Assume the jobs are processed using the earliest-due-date rule. Job A B C D E Processing time (weeks) 2 0.7 1 4 1.3 Due time (weeks) 1 8 4 5 2 12. What would be the lateness of job B? What would be the tardiness of job E? 14. What is the maximum tardiness for this set of jobs? Note: Round your answer to 1 decimal place. 15. What is the average flow time for this set of jobs? Note: Round your answer to the nearest whole number.arrow_forwardGiven 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 6.5arrow_forwardUsing the FCFS rule for scheduling, the sequence is Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The table below highlights the time taken in hours for cutting and sewing (process 1) and delivery (process 2) of each For the schedule developed using the FCFS rule, the total length of time taken to complete the three suits (including of the suits. delivery) = hours (enter your response as a whole number). Times Taken for Different Activities (hours) Deliver Suit Cut and Sew Using Johnson's rule for 2-machine scheduling, the sequence is 1 2. For the schedule developed using the Johnson's rule, the total length of time taken to complete the three suits 3 (including delivery) = hours (enter your response as a whole number). Assume that orders for suits have been listed in the above table in the order in which they were received. Of the two developed schedules, V rule gets the schedule finished sooner.arrow_forward
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