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business
operations management 6th
Operations Management 14th International Edition William J Stevenson - Solutions
Do sensitivity analysis on the solution to a linear programming problem.
A small construction firm specializes in building and selling single-family homes. The firm offers two basic types of houses: model A and model B. Model A houses require 4,000 labor hours, 2 tons of stone, and 2,000 board feet of lumber. Model B houses require 10,000 labor hours, 3 tons of stone,
This LP model was solved by computer:The following information was obtained from the output. The ranges were also computed based on the output, and they are shown as well.a. Which decision variables are basic (i.e., in solution)?b. By how much would the profit per unit of product 1 have to increase
Explain the strategic importance of product and service design.
Describe what product and service design does.
Name the key questions of product and service design.
Identify some reasons for design or redesign.
List some of the main sources of design ideas.
Discuss the importance of legal, ethical, and sustainability considerations in product and service design.
Explain the purpose and goal of life-cycle assessment.
Explain the phrase “the 3 Rs.”
Briefly describe the phases in product design and development.
Discuss several key issues in product or service design.
Discuss the two key issues in service design.
List the characteristics of well-designed service systems.
List some guidelines for successful service design.
A firm’s manager must decide whether to make or buy a certain item used in the production of vending machines. Making the item would involve annual lease costs of $150,000. Cost and volume estimates are as follows:a. Given these numbers, should the firm buy or make this item?b. There is a
A small firm produces and sells automotive items in a five-state area. The firm expects to consolidate assembly of its battery chargers line at a single location. Currently, operations are in three widely scattered locations. The leading candidate for location will have a monthly fixed cost of
A manager must decide which type of equipment to buy, Type A or Type B. Type A equipment costs $15,000 each, and Type B costs $11,000 each. The equipment can be operated 8 hours a day, 250 days a year.Either machine can be used to perform two types of chemical analysis, C1 and C2. Annual service
Processes are commonly represented in either of two ways. One style uses blocks to represent operations. A similar style uses circles rather than blocks: Operation Operation Process can operate in series, as shown in the preceding diagram, or in parallel, as shown here: 4 11 units/hr Operation
Explain the strategic importance of process selection and the influence it has on the organization and its supply chain.
Name the two main factors that influence process selection.
Compare the four basic processing types.
Explain the need for management of technology.
List some reasons for redesign of layouts.
Describe product layouts and their main advantages and disadvantages.
Describe process layouts and their main advantages and disadvantages.
Solve simple line-balancing problems.
Develop simple process layouts.
The tasks shown in the following precedence diagram are to be assigned to workstations with the intent of minimizing idle time. Management has designed an output rate of 275 units per day. Assume 440 minutes are available per day.a. Determine the appropriate cycle time.b. What is the minimum number
Assign nine automobile service departments to bays in a 3 × 3 grid so that the closeness ratings in the following matrix are satisfied. (The unimportant and ordinary-importance ratings have been omitted to simplify the example.) The location of department 4 must be in the upper right-hand corner
Five departments are to be assigned to locations B through F in the grid. (For technical reasons, department 6 must be assigned to location A.) Transportation cost is $2 per foot. The objective is to minimize total transportation cost. Information on interdepartmental work flows and distances
Explain the importance of work design.
Compare and contrast the two basic approaches to job design.
Discuss the advantages and disadvantages of specialization.
Describe behavioral approaches to job design.
Discuss the impact of working conditions on job design.
Compare the advantages and disadvantages of time-based and output-based pay systems.
Explain the purpose of methods analysis and describe how methods studies are performed.
Describe four commonly used techniques for motion study.
Define a standard time.
Describe and compare time study methods and perform calculations.
Describe work sampling and perform calculations.
Compare stopwatch time study and work sampling.
A time study analyst timed an assembly operation for 30 cycles, and then computed the average time per cycle, which was 18.75 minutes. The analyst assigned a performance rating of .96, and decided that an appropriate allowance was 15 percent. Assume the allowance factor is based on the workday.
A time study analyst wants to estimate the number of observations that will be needed to achieve a specified maximum error, with a confidence of 95.5 percent. A preliminary study yielded a mean of 5.2 minutes and a standard deviation of 1.1 minutes. Determine the total number of observations needed
Work sampling. An analyst has been asked to prepare an estimate of the proportion of time that a turret lathe operator spends adjusting the machine, with a 90 percent confidence level. Based on previous experience, the analyst believes the proportion will be approximately 30 percent.a. If the
Compute the standard deviation of this data: 3 2 4 1 Step 1: Find the mean of the data.Step 2: Subtract the mean from each data point. These differences should sum to 0.Step 3: Square each difference and sum the squares.Step 4: Divide the sum of the squared differences by n − 1.Step 5: Compute
Identify some of the main reasons organizations need to make location decisions.
Explain why location decisions are important.
Discuss the options available for location decisions.
Discuss key considerations related to global location decisions.
Outline the decision process for making location decisions.
Describe some of the key factors that guide service and retail location decisions.
Use the techniques presented to evaluate location alternatives.
A farm implements dealer is seeking a fourth warehouse location to complement three existing warehouses. There are three potential locations: Charlotte, NC; Atlanta, GA; and Columbia, SC. Charlotte would involve a fixed cost of $4,000 per month and a variable cost of $4 per unit; Atlanta would
A manufacturer of staplers is about to lose its lease, so it must move to another location. Two sites are currently under consideration. Fixed costs would be $8,000 per month at site A and $9,400 per month at site B. Variable costs are expected to be $5 per unit at site A and $4 per unit at site B.
Determine which location has the higher factor rating given the following information. Factor Labor cost Material cost Transportation costs Weight 5 3 2 Location Scores A 20 10 50 B 40 30 10
Determine the center of gravity location for these destinations: Destination D1 D2 D3 D4 x, y Coordinates 3,5 6,8 2,7 4,5 Weekly Quantity 20 10 15 15 60
Discuss the philosophies of quality gurus.
Define the term quality as it relates to products and as it relates to services.
Identify the determinants of quality.
Explain why quality is important and the consequences of poor quality.
Describe and give examples of the costs associated with quality.
Discuss the importance of ethics in managing quality.
Compare the quality awards.
Discuss quality certification and its importance.
Describe TQM.
Give an overview of problem solving.
Give an overview of process improvement.
Describe the Six Sigma methodology.
Describe and use various quality tools.
The county sheriff’s department handed out the following tickets on a summer weekend. Make a check sheet and a Pareto diagram for the types of infractions. Ticket Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Infraction Excessive speed Expired inspection Improper turn Excessive speed
Explain the need for quality control.
Discuss the basic issues of inspection.
List and briefly explain the elements of the control process.
Explain how control charts are used to monitor a process and the concepts that underlie their use.
Use and interpret control charts.
Perform run tests to check for nonrandomness in process output.
Assess process capability
Process distribution and sampling distribution. An industrial process that makes 3-foot sections of plastic pipe produces pipe with an average inside diameter of 1 inch and a standard deviation of .05 inch.a. If you randomly select one piece of pipe, what is the probability that its inside diameter
Using the appropriate control chart, determine two-sigma control limits for each case:a. An inspector found an average of 3.9 scratches in the exterior paint of each of the automobiles being prepared for shipment to dealers.b. Before shipping lawn mowers to dealers, an inspector attempts to start
The number of defective items per sample for 11 samples is shown below. Determine if nonrandom patterns are present in the sequence. Number of defectives 1 2 22 17 SAMPLE 3 4 5 6 19 25 18 20 21 17 23 7 8 9 10 11 23 24
Process capability. Determine which of these three processes are capable: Process 1 2 3 Mean 7.5 4.6 6.0 Standard Deviation .10 .12 .14 Lower Spec 7.0 4.3 5.5 Upper Spec 8.0 4.9 6.7
Explain what aggregate planning is and how it is useful.
Identify the variables decision makers have to work with in aggregate planning.
Describe some of the strategies that can be used for meeting uneven demand.
Describe some of the graphical and quantitative techniques planners use.
Prepare aggregate plans and compute their costs.
Discuss aggregate planning in services.
Disaggregate an aggregate plan.
Describe the master scheduling process and explain its importance.
A manager is attempting to put together an aggregate plan for the coming nine months. She has obtained a forecast of expected demand for the planning horizon. The plan must deal with highly seasonal demand; demand is relatively high in periods 3 and 4, and again in period 8, as can be seen from the
Spring and Summer Fashions, a clothing producer, has generated a forecast for the next eight weeks.Demand is expected to be fairly steady, except for periods 3 and 4, which have higher demands.The company typically hires seasonal workers to handle the extra workload in periods 3 and 4. The cost for
Prepare a schedule like that shown in Figure 11.12 for the following situation: The forecast for each period is 70 units. The starting inventory is zero. The MPS rule is to schedule production if the projected inventory on hand is negative. The production lot size is 100 units. The following table
Define the term inventory.
List the different types of inventory.
Describe the main functions of inventories.
Discuss the main requirements for effective management.
Explain periodic and perpetual review systems.
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