Principles Of Operations Management Sustainability And Supply Chain Management 10th Global Edition Barry Render, Chuck Munson, Jay Heizer - Solutions

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1 WHAT IS OPERATIONS STRATEGY?
What approaches do supermarkets use to offset variations in customer traffic intensity? LO.1
The following information pertains to telephone calls to a motel on a typical Tuesday.Period Incoming Rate(calls per minute)Service Rate(calls per minute per operator)Number of Operators Morning 1.8 1.5 2 Afternoon 2.2 1.0 3 Evening 1.4 0.7 3a. Determine the average time callers wait to have their
If you were the manager, which option would you select? Why?Explain the disparity between the results for the two options. What assumptions did you make in your analysis? LO.1
Explain what scheduling involves and the importance of good scheduling. LO.1
Compare product and service scheduling hierarchies. LO.1
Describe scheduling needs in high-volume systems. LO.1
Describe scheduling needs in intermediate-volume systems. LO.1
Describe scheduling needs in job shops. LO.1
Use and interpret Gantt charts. LO.1
Use the assignment method for loading. LO.1
Give examples of commonly used priority rules. LO.1
Discuss the theory of constraints and that approach to scheduling. LO.1
Summarize some of the unique problems encountered in service systems, and describe some of the approaches used for scheduling service systems. LO.1
Why is scheduling fairly simple for repetitive systems but fairly complex for job shops? LO.1
What are the main decision areas of job-shop scheduling? LO.1
What are Gantt charts? How are they used in scheduling? What are the advantages of using Gantt charts? LO.1
What are the basic assumptions of the assignment method of linear programming? LO.1
Briefly describe each of the following priority rules:a. FCFSb. SPTc. EDDd. S/Oe. Rush LO.1
Why are priority rules needed? LO.1
What problems not generally found in manufacturing systems do service systems present in terms of scheduling the use of resources? LO.1
Explain forward and backward schedulings and each one’s advantage. LO.1
How are scheduling and productivity related? LO.1
What factors would you take into account in deciding whether to split a job? LO.1
Explain the term makespan. LO.1
What general trade-offs are involved in sequencing decisions? In scheduling decisions? LO.1
Who needs to be involved in setting schedules? LO.1
How has technology had an impact on scheduling? LO.1
Name three examples of unethical behavior involving scheduling and state the ethical principle each violates. LO.1
Use the assignment method to determine the best way to assign workers to jobs, given the following cost information. Compute the total cost for your assignment plan.JOB A B C 1 5 8 6 Worker 2 6 7 9 3 4 5 3 LO.1
Rework Problem 1, treating the numbers in the table as profits instead of costs. Compute the total profit. LO.1
Assign trucks to delivery routes so that total costs are minimized, given the cost data shown. What is the total cost?ROUTE A B C D E 1 4 5 9 8 7 2 6 4 8 3 5 Truck 3 7 3 10 4 6 4 5 2 5 5 8 5 6 5 3 4 9 LO.1
Develop an assignment plan that will minimize processing costs, given the information shown, and interpret your answer.WORKER A B C 1 12 8 11 Job 2 13 10 8 3 14 9 14 4 10 7 12 LO.1
Use the assignment method to obtain a plan that will minimize the processing costs in the following table under these conditions:a. The combination 2-D is undesirableb. The combinations 1-A and 2-D are undesirable WORKER A B C D E 1 14 18 20 17 18 2 14 15 19 16 17 Job 3 12 16 15 14 17 4 11 13 14 12
The following table contains information concerning four jobs that are awaiting processing at a work center.Job Job Time(days)Due Date(days)A 14 20 B 10 16 C 7 15 D 6 17a. Sequence the jobs using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. Assume the list is by order of arrival.b. For each of the
Using the information presented in the following table, identify the processing sequence that would result using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. For each method, determine (1) average job flow time, (2) average job tardiness, and (3) average number of jobs in the system. Jobs are listed in
The following table shows orders to be processed at a machine shop as of 8:00 a.m. Monday. The jobs have different operations they must go through. Processing times are in days. Jobs are listed in order of arrival.a. Determine the processing sequence at the first work center using each of these
A wholesale grocery distribution center uses a two-step process to fill orders. Tomorrow’s work will consist of filling the seven orders shown. Determine a job sequence that will minimize the time required to fill the orders.TIME (hours)Order Step 1 Step 2 A 1.20 1.40 B 0.90 1.30 C 2.00 0.80 D
The times required to complete each of eight jobs in a two-machine flow shop are shown in the table 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
Given the operation times provided:a. Develop a job sequence that minimizes idle time at the two work centers.b. Construct a chart of the activities at the two centers, and determine each one’s idle time, assuming no other activities are involved.JOB TIMES (minutes)A B C D E F Center 1 20 16 43
A shoe repair operation uses a two-step sequence that all jobs in a certain category follow. All jobs can be split in half at both stations. For the group of jobs listed:a. Find the sequence that will minimize total completion time.b. Determine the amount of idle time for workstation B.c. What jobs
The following schedule was prepared by the production manager of Marymount Metal Shop:Determine a schedule that will result in the earliest completion of all jobs on this list.CUTTING POLISHING Job Start Finish Start Finish A 0 2 2 5 B 2 6 6 9 C 6 11 11 13 D 11 15 15 20 E 15 17 20 23 F 17 20 23 24
The production manager must determine the processing sequence for seven jobs through the grinding and then deburring departments. The same sequence will be followed in both departments.The manager’s goal is to move the jobs through the two departments as quickly as possible.The foreman of the
A foreman has determined processing times at a work center for a set of jobs and now wants to sequence them. Given the information shown, do the following:a. Determine the processing sequence using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. For each sequence, compute the average job tardiness, the
Given the information in the following table, determine the processing sequence that would result using the S/O rule.Job Remaining Processing Time (days)Due Date Remaining Number of Operations a 5 8 2 b 6 5 4 c 9 10 4 d 7 12 3 e 8 10 2 LO.1
Given the following information on job times and due dates, determine the optimal processing sequence using (1) FCFS, (2) SPT, (3) EDD, and (4) CR. For each method, find the average job flow time and the average job tardiness. Jobs are listed in order of arrival.Job Job Time (hours)Due Date
The Budd Gear Co. specializes in heat-treating gears for automobile companies. At 8:00 a.m., when Budd’s shop opened today, five orders (listed in order of arrival) were waiting to be processed.Order Order Size(units)Per Unit Time in Heat Treatment(minutes/unit)Due Date(min. from now)A 16 4 160 B
The following table contains order-dependent setup times for three jobs. Which processing sequence will minimize the total setup time?Following Job’s Setup Time (hrs.)Setup Time (hrs.) A B C Preceding Job A 2 — 3 5 B 3 8 — 2 C 2 4 3 — LO.1
The following table contains order-dependent setup times for three jobs. Which processing sequence will minimize the total setup time?Following Job’s Setup Time (hrs.)Setup Time (hrs.) A B C Preceding Job A 2.4 — 1.8 2.2 B 3.2 0.8 — 1.4 C 2.0 2.6 1.3 — LO.1
The following table contains order-dependent setup times for four jobs. For safety reasons, job C cannot follow job A, nor can job A follow job C. Determine the processing sequence that will minimize the total setup time. (Hint: There are 12 alternatives.)Following Job’s Setup Time (hrs.)Setup
Given this information on planned and actual inputs and outputs for a service center, determine the work backlog for each period. The beginning backlog is 12 hours of work. The figures shown are standard hours of work.PERIOD 1 2 3 4 5 Input Planned 24 24 24 24 20 Actual 25 27 20 22 24 Output
Given the following data on inputs and outputs at a work center, determine the cumulative deviation and the backlog for each time period. The beginning backlog is 7.PERIOD 1 2 3 4 5 6 Input Planned 200 200 180 190 190 200 Actual 210 200 179 195 193 194 PERIOD 1 2 3 4 5 6 Output Planned 200 200 180
Determine the minimum number of workers needed, and a schedule for the following staffing requirements, giving workers two consecutive days off per cycle (not including Sunday).Day Mon Tue Wed Thu Fri Sat Staff needed 2 3 1 2 4 3 LO.1
Determine the minimum number of workers needed, and a schedule for the following staffing requirements, giving workers two consecutive days off per cycle (not including Sunday).Day Mon Tue Wed Thu Fri Sat Staff needed 3 4 2 3 4 5 LO.1
Determine the minimum number of workers needed, and a schedule for the following staffing requirements, giving workers two consecutive days off per cycle (not including Sunday).Day Mon Tue Wed Thu Fri Sat Staff needed 4 4 5 6 7 8 LO.1
Briefly describe computer-assisted approaches to production. LO.1
What is a flexible manufacturing system, and under what set of circumstances is it most appropriate? LO.1
What are the main advantages of a process layout? The main disadvantages? LO.1
What is the goal of line balancing? What happens if a line is unbalanced? LO.1
Compare equipment maintenance strategies in product and process layouts. LO.1
What are heuristic approaches, and why are they used in designing layouts? LO.1
Why are product layouts atypical in service environments? LO.1
What is cellular manufacturing? What are its main benefits and limitations? LO.1
What is group technology? LO.1
For which decision environment is linear programming most suited?LO.1
For Problem 6a, determine the following:a. The range of feasibility for each constraintb. The range of optimality for the coefficients of the objective function LO.1
A wood products firm uses available time at the end of each week to make goods for stock.Currently, two products on the list of items are produced for stock: a chopping board and a knife holder. Both items require three operations: cutting, gluing, and finishing. The manager of the firm has
A manager wants to know how many units of each product to produce on a daily basis to achieve the highest profit. Production requirements for the products are shown in the following table.Material 1 (pounds)Material 2 (pounds)Labor (hours)A 2 3 3.2 B 1 5 1.5 C 6 — 2.0 Material 1 costs $5 a pound,
A garden store prepares various grades of pine bark for mulch: nuggets (x1), mini-nuggets (x2), and chips (x3). The process requires pine bark, machine time, labor time, and storage space. The following model has been developed.Maximize Z = 9x1 + 9x2 + 6x3 (profit)Subject to:Bark 5 x 1  + 6 x 2
The optimal quantities of products and the necessary quantities of labor and materials.LO.1
One proposal is to make equal amounts of the products. What amount of each will maximize contribution, and what quantities of labor and materials will be needed? How much less will total contribution be if this proposal is adopted?LO.1
Should additional laminate be purchased. If so, how much?LO.1
What is the maximum profit that can be achieved by purchasing additional wood?LO.1
Which part of the cost in the in the EOQ is a linear function of the order quantity?
Even if we have substantial uncertainty in the parameters in the EOQ-model, it is still quite a useful model. Why?
What shall be considered if we shall increase the order quantity from the optimal to a discount point?
Suggest how we could set the time between deliveries in a fixed period system.
Cycle counting:a) means that we count all articles after a specified time periodb) leads us to count A items more frequent then B itemsc) require all A items to be counted the same dayd) is a legal requirement
The EOQ model isa) not very useful in practice since the assumptions are unrealisticb) finds the optimal safety stockc) is quite useful, due to the fact that the optimum is quite flatd) depending on the standard deviation of the demande) has an impact of the re-order-point
The safety stock in re-order point system:a) shall with a certain probability cover demand exceeding the expected during the lead-timeb) is a non-linear function of lead-timec) is not depending on the order-quantityd) all of the above.
Answer Question 4 for some other organization, perhaps an organization where you have worked.
Mass customization and rapid product development were identified as challenges to modern manufacturing operations.What is the relationship, if any, between these challenges?Can you cite any examples?
Suggest measurements of productivity which are often used by operations managers in:a. Airlineb. Busc. Hotel
Many believe that productivity is the essence of operations management. Suggest reasons to support this claim.
Discuss the overlap amongst operations, marketing, and finance—the three functions basic to all organizations—for small medium enterprises.
The current challenges in operations management are:a) Globalizationb) Supply-chain partneringc) Sustainabilityd) Lean operationse) All of the above
Stakeholders are those with a vested interest in an organization, including:a) customers,b) suppliers,c) owners,d) employees,e) all of the above.
Which of the following events are considered significant in the evolution of operations management:a) cost focusb) quality focusc) customization focusd) globalization focuse) all of the above
What are the key advantages and disadvantages ofa. time-based pay plans?b. incentive plans? LO.1
In what ways does technology have an impact on job design? LO.1
What are the ethical dilemmas that project managers faced with when dealing with projects?
While numerous trade-offs may be required during the life cycle of a project, the trade-offs between cost, time and performance are considered essential. Please discuss.
A well designed WBS helps the project manager in that:a) It defines all the elements of the project in a hierarchical outline (map)b) It defines the relationship of the projectto its subdeliverables, and in turn, their relationships to work packagesc) It serves as a framework for tracking cost and
There are the following advantages to AON method:a) No dummy activities are usedb) Nodes designate activitiesc) Events are not usedd) Easy to draw if dependencies are not intensee) All of the above
When an activity has to be crashed, the following have to be considered:a) the inherent risks involved in crashing particular activities need to be considered, as some activities are riskier to crash than othersb) the timing of activities needs to be consideredc) crashing frequently results in
What is efficiency?
A system to ensure that an organization can resume business after a disruption is called:a) Crisis avoidance planningb) Crisis continuation planningc) Crisis disaster planningd) Business continuity planninge) Business crisis and continuity management
Catastrophic (“super”) events:a) affect many suppliers (sometimes all)b) can affect an entire nation even the entire worldc) would include such events as an entire set of airlines being groundedd) large-scale natural disasterse) widespread communications failuref) all the above.
What are the characteristics of supplier partnerships with respect to suppliers?
Standardized, reusable containers have obvious benefits for shipping. What is the purpose of these devices within the plant?

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Principles Of Operations Management Sustainability And Supply Chain Management 10th Global Edition Barry Render, Chuck Munson, Jay Heizer - Solutions

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