Practical Operations Management
2nd Edition
ISBN: 9781939297136
Author: Simpson
Publisher: HERCHER PUBLISHING,INCORPORATED
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Chapter 14, Problem 1.1Q
Summary Introduction
To find:The sequence in which B Construction should complete the repair projects of six road.
Introduction:TheJohnson rule is a technique of
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De 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…
Using the FCFS rule for scheduling, the sequence is
▼
1-3-2
3-1-2
1-2-3
2-1-3
2-3-1
3-2-1
.
Part 2
For the schedule developed using the FCFS rule, the total length of time taken to complete the three suits (including delivery) =
enter your response here
hours (enter your response as a whole number).
Part 3
Using Johnson's rule for 2-machine scheduling, the sequence is
▼
3-1-2
1-2-3
2-1-3
3-2-1
2-3-1
1-3-2
.
Part 4
For the schedule developed using the Johnson's rule, the total length of time taken to complete the three suits (including delivery) =
enter your response here
hours (enter your response as a whole number).
Part 5
Of the two developed schedules,
▼
Johnson's
the FCFS
rule gets the schedule finished sooner.
...
Question content area right
Part 1
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…
Priority rules. Job times (including processing and setup) are shown in the following table for five jobs waiting to be processed at a work center.Job Job Time (hours) Due Date (hours)a 12 15b 6 24c 14 20d 3 8e 7 6Determine the processing sequence that would result from each of these priority rules:a. SPT b. EDD
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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- At 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…arrow_forwardSix jobs are to be processed through a two-stepoperation. The first operation involves sanding, and the second involves painting. Processing times are as follows: Determine a sequence that will minimize the total completiontime for these jobs. Illustrate graphically.arrow_forwardAllocate the tasks to workstations taking into consideration the precedence requirements and using the LOT rule to break ties between feasible tasks.arrow_forward
- Two jobs must be processed through four machines in the same order. The processing times in the required sequence are (given) Determine how the two jobs should be scheduled in order to minimize the total makespan, and draw the Gantt chart indicating the optimal schedule.arrow_forwardRegarding section D with assigning the workstations: How would Task F go first if it could not be completed with Task D? Usint LOT. regardless of the time each took, doesn't one still have to bare in mind the predecessors? I would assume Tasks A and B would be Workstation 1, considering that 45 plus 20 seconds is less than the cycle time and factoring in the fact that C only requires A to be completed, hence why the workstation should start at A followed by C.arrow_forwardWhich Priority Rules are used for Job Sequencing?arrow_forward
- At the campus copy shop, six jobs have a rrived in the order shown (A, B, C, D, E, and F) at the beginning of the day (today, which is a workday). All of the jobs are due at varioustimes today. Your task is to evaluate four common sequencing rules. a) Sequence the jobs according to the following decision rules:FCFS, EDD, SPT, and LPT.b) For the FCFS sequence, compute the average completion (flow) time, average lateness, and average number of jobs in the system.c) For the EDD sequence, compute the average completion (flow) time, average lateness, and average number of jobs in the system.d) For the SPT sequence, compute the average completion (flow) time, average lateness, and average number of jobs in the system. e) For the LPT sequence, compute the average completion (flow)time, average lateness, and average number of jobs…arrow_forwardEvan Schwartz has six jobs waiting to be processedthrough his machine. Processing time (in days) and duedate information for each job are as follows:Sequence the jobs by FCFS, SPT, SLACK, and DDATE.Calculate the mean flow time and mean tardiness of the sixjobs under each sequencing rule. Which rule would yourecommend?arrow_forwardDetermine all of the various real-time scheduling options that are accessible to the team working on the project.arrow_forward
- This question has no precedence activities details. Therefore you can proceed without precedence activities as consider the project has the sequence of given order. Number of Workdays 5 days weekarrow_forwardWhich are the Principles of Workcenter Scheduling?arrow_forwardDraw Gantt Chart for this Scheduling Projectarrow_forward
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