Operations Management
11th Edition
ISBN: 9780132921145
Author: Jay Heizer
Publisher: PEARSON
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Chapter 15, Problem 2DQ
Summary Introduction
To determine: The four criteria for
Introduction: Scheduling is the process of controlling and arranging the workloads of the production process using an optimized method. It is used to plan allocating human resources and machinery.
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Students have asked these similar questions
Question1:
Discuss the critical importance of work schedule in project management.2. Discuss the contribution of cost estimation in the completion of successful project.3. A firm is planning a project which consists of the following ten jobs and precedence relations are identified with their node numbers:
Jobs (i-j)
1-2
1-3
2-3
2-4
2-5
3-5
4-7
5-6
6-7
7-8
Durations (days)
9
5
12
7
8
11
10
3
4
6
Draw an arrow diagram representing the project.b. Determine the critical pathc. What is the duration of the project?
Question 1) Scheduling
If the following jobs are sequenced according to the FCFS rule
Job
Processing Time (days)
Due Date
A
8
12
B
6
15
C
11
17
D
5
10
E
3
8
What is the mean tardiness (in days) for all jobs?
What is the mean completion time in days for all jobs?
What is the maximum job tardiness (in days)
Question 1
Four floral arranging jobs are to be carried out across three stations: A (Arrange), B (Bag), C (crop) shown. The station sequences and job times in minutes are shown below, along with the due dates for each job. Using an "earliest due date" job dispatching priority rule, which, if any, of the jobs in will be late? Tip: create a Gantt chart schedule before answering Questions 4 & 5.
a. Jobs 2 & 3
b. Jobs 3 & 4
c. Job 3
d. Job 4
e. None of the jobs will be late
Chapter 15 Solutions
Operations Management
Ch. 15 - Prob. 1DQCh. 15 - Prob. 2DQCh. 15 - Prob. 3DQCh. 15 - Prob. 4DQCh. 15 - Prob. 5DQCh. 15 - Prob. 6DQCh. 15 - Prob. 7DQCh. 15 - Prob. 8DQCh. 15 - Prob. 9DQCh. 15 - Prob. 10DQ
Ch. 15 - Prob. 11DQCh. 15 - Prob. 12DQCh. 15 - Prob. 13DQCh. 15 - Prob. 1PCh. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Prob. 5PCh. 15 - Prob. 6PCh. 15 - Prob. 7PCh. 15 - Prob. 8PCh. 15 - Prob. 9PCh. 15 - Prob. 10PCh. 15 - Prob. 11PCh. 15 - Prob. 12PCh. 15 - Prob. 13PCh. 15 - Prob. 14PCh. 15 - Prob. 15PCh. 15 - Prob. 16PCh. 15 - Prob. 17PCh. 15 - Prob. 18PCh. 15 - Prob. 19PCh. 15 - Prob. 20PCh. 15 - Prob. 21PCh. 15 - Prob. 1CSCh. 15 - Prob. 2CSCh. 15 - Prob. 3CSCh. 15 - Prob. 4CSCh. 15 - Prob. 1.1VCCh. 15 - Prob. 1.2VCCh. 15 - Prob. 1.3VCCh. 15 - Prob. 1EDCh. 15 - Prob. 2.1VCCh. 15 - Prob. 2.2VCCh. 15 - Prob. 2.3VCCh. 15 - Prob. 2.4VC
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- Question Scenario: Early one Monday morning in Jamaica, Susan, a Restaurant Manager starts getting ready for the morning’s work operations. She is particularly happy because tonight he has a date with Marvin, the new Chef that was recently hired. The problem, as Susan sees it, is that Roberta, another Restaurant employee has been just a little too friendly with Marvin lately and that really upsets Susan. Susan has redone the work schedule, assigning Roberta the clean-up shift in the night and cutting back on her hours of work. She is hoping that Roberta would simply quit and out of her way. However, that plan doesn’t seem to be working. Despite a lighter pay cheque and frequent reprimand through the disciplinary process of creating reasons to write to her about her conduct and performance. Roberta has decided to quit her studies due to her inability to fund her tuition. A few days later, Susan noticed Marvin and Roberta having lunch together in the staff dining room. Susan got furious…arrow_forwardQuestion 34 Consider the processing times and priorities for four jobs: Job Processing time (minutes) Weight/Priority (cost per minute) A 10 6 B 2 1 C 50 2 D 16 10 Assume the weighted shortest processing time (WSPT) rule is used. Which job should be processed third? Group of answer choices A B C Darrow_forwardQuestion 1 (b) A company is considering to invest in eight projects. The estimated cost of each project, the perceived priority points, the estimated number of new jobs each project would create are provided in the Table 1. Table 1 Project Cost ($) Priority Points New Jobs X1 X2 X3 X4 X5 X6 X7 X8 5000 4500 600 2000 6000 800 3200 2500 3176 2774 3513 2928 4607 862 3829 2708 5 1 2 1 3 1 7 2 1. Formulate objective function for this 0-1 integer model to maximise the total number of perceived priority points. Considering the above problem write down mathematical equations for each of following conditions/constraints. 2. A budget of $21000 is available for the projects. 3. The company wishes to fund at most three of the projects. 4. The company wants to create at least 8 new jobs from these projects.…arrow_forward
- Question 1 (b) A company is considering to invest in eight projects. The estimated cost of each project, the perceived priority points, the estimated number of new jobs each project would create are provided in the Table 1. Table 1 Project Cost ($) Priority Points New Jobs X1 X2 X3 X4 X5 X6 X7 X8 5000 4500 600 2000 6000 800 3200 2500 3176 2774 3513 2928 4607 862 3829 2708 5 1 2 1 3 1 7 2 4. The company wants to create at least 8 new jobs from these projects. 5. Only one of the two projects, i.e., X3 and X5 should be funded at this time but not both. 6. The company believes that if it decides to invest in project X7 then it should also invest in project X8, and vice versa. [DO NOT SOLVE THE ABOVE MODEL YOU DEVELOPED IN QUESTION 1 (b).…arrow_forwardQUESTION 5a. A Chef bakes and decorates cakes in a two-stage process. The cakes are baked and once cooledthey are then decorated based on the clients’ requirements. The Chef received seven orders forfully decorated cakes and has documented the orders with respective processing times for bakingand decorating, as shown in Table 7 that follows:.Table 7. Cake Job Orders received by the Chef with the respective processing times for Baking andDecoratingCake Job Order Baking Processing Time Decorating Processing TimeA 2 1B 8 5C 4 6D 9 7E 7 8F 9 6G 3 5 (ii) Illustrate the flow (throughput) times to complete the baking and decorating on atimeline chart.arrow_forwardQUESTION 5a. A Chef bakes and decorates cakes in a two-stage process. The cakes are baked and once cooledthey are then decorated based on the clients’ requirements. The Chef received seven orders forfully decorated cakes and has documented the orders with respective processing times for bakingand decorating, as shown in Table 7 that follows:.Table 7. Cake Job Orders received by the Chef with the respective processing times for Baking andDecoratingCake Job Order Baking Processing Time Decorating Processing TimeA 2 1B 8 5C 4 6D 9 7E 7 8F 9 6G 3 5 (i) Using Johnson’s Rule, determine the optimum sequence for processing the cake joborders through the baking and decorating stages.arrow_forward
- Question3: Two processes are applied in the same order to the jobs coming to a workstation. The durations of both processes for the six jobs coming to the workstation are as seen in the table. In order to minimize the total time to be spent on the jobs, the order in which the jobs should be done will be determined by the "johnson" rule. Accordingly, in the table below, write the order in which the business should do the work, in order, with the first things to be done on the far left, and one action to be written in each blank.1-) When the jobs are done in this order, how many minutes will it take to complete all the jobs?2-)1. How many minutes of space will there be in total in the process and the 2nd process?arrow_forwardQuestion 35 Consider the processing times and due dates of the following jobs: Job Processing time (days) Due date (days) 1 3 29 2 19 25 3 24 40 4 8 20 What is the average lateness if the earliest due date (EDD) is used to sequence the jobs? Group of answer choices 0.75 1.25 4.25 5.67arrow_forwardQUESTION: Although Ken Brown is the principal owner of Brown Oil, his brother Bob is credited with making the company a financial success. Bob is vice president of finance. Bob attributes his success to his pessimistic attitude about business and the oil industry. Given the information, it is likely that Bob will arrive at a different decision. What decision criterion should Bob use, and what alternative will he select? INFO NEEDED TO COMPLETE: Kenneth Brown is the principal owner of Brown Oil, Inc. After quitting his university teaching job, Ken has been able to increase his annual salary by a factor of over 100. At the present time, Ken is forced to consider purchasing some more equipment for Brown Oil because of competition. His alternatives are shown in the following table: Equipment Favorable Market $ Unfavorable Market $ Sub 100 300,000 -200,000 Oiler J 250,000 -100,000 Texan 75,000 -18,000 For example, if Ken purchases a Sub 100 and if there is a favorable market,…arrow_forward
- Question 1: According to the Columbia Accident Investigation Board, the root cause of the Columbia disaster was directly tied to Management’s unwillingness to adequately address the tradeoffs between the program’s conflicting goals of: Group of answer choices A) Cost, schedule, and safety B) Schedule, morale, and risk C) Safety, customer satisfaction, and schedule D) Cost, risk, and test flightsarrow_forwardQuestion 33 The processing times of five jobs are given as follows: Job Processing time (minutes) A 20 B 60 C 30 D 75 E 15 Assume the jobs arrived in alphabetical order of the job name and no other job arrives in the next 200 minutes. What is the average inventory if the jobs are processed in shortest processing time (SPT) order? Group of answer choices 3.00 2.92 1.97 2.20arrow_forwardDefine schedule activity lagarrow_forward
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