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supply chain management 2nd
Operations And Supply Chain Management 14th Edition Chase, Richard B.;Jacobs, F. Robert - Solutions
14. Consider the following tasks, times, and predecessors for an assembly of set-top cable converter boxes:Given a cycle time of four minutes, develop two alternative layouts. Use the longest task time rule and the largest number of following tasks as a secondary criterion.What is the efi ciency of
13. The Sun River beverage company is a regional producer of teas, exotic juices, and energy drinks. With an interest in healthier lifestyles, there has been an increase in demand for its sugar-free formulation.The i nal packing operation requires 13 tasks. Sun River bottles its sugar-free product
12. A i rm uses a serial assembly system and needs answers to the following:a. An output of 900 units per shift (7.5 hours) is desired for a new processing system. The system requires product to pass through four stations where the work content at each station is 30 seconds. What is the required
11. The l ow of materials through eight departments is shown on the next page. Even though the table shows l ows into and out of the different departments, assume that the direction of l ow is not important. In addition, assume that the cost of moving material depends only on the distance moved.a.
10. The following tasks are to be performed on an assembly line:The workday is seven hours long. Demand for completed product is 750 per day.a. Find the cycle time required to produce 750 units per day.b. What is the theoretical number of workstations?c. Draw the precedence diagram.d. Balance the
9. An assembly line is to be designed to operate 71⁄2 hours per day and supply a steady demand of 300 units per day. Here are the tasks and their performance times:a. Draw the precedence diagram.b. What is the workstation cycle time required to produce 300 units per day?c. What is the theoretical
8. An initial solution has been given to the following workcenter layout problem. Given the l ows described and a cost of $2.00 per unit per foot, compute the total cost for the layout. Each location is 100 feet long and 50 feet wide as shown in the following i gure.Use the centers of departments
7. Some tasks and the order in which they must be performed according to their assembly requirements are shown in the following table. These are to be combined into workstations to create an assembly line. The assembly line operates 71⁄2 hours per day. The output requirement is 1,000 units per
6. The desired daily output for an assembly line is 360 units. This assembly line will operate 450 minutes per day. The following table contains information on this product’s task times and precedence relationships:Task Task Time (Seconds) Immediate Predecessor A 30 —B 35 A C 30 A D 35 B E 15 C
5. An assembly line is to operate eight hours per day with a desired output of 240 units per day. The following table contains information on this product’s task times and precedence relationships:a. Draw the precedence diagram.b. What is the workstation cycle time required to produce 240 units
4. An assembly line makes two models of trucks: a Buster and a Duster. Busters take 12 minutes each and Dusters take 8 minutes each. The daily output requirement is 24 of each per day. Develop a perfectly balanced mixed-model sequence to satisfy demand.
3. The Dorton University president has asked the OSCM department to assign eight biology professors (A, B, C, D, E, F, G, and H) to eight ofi ces (numbered 1 to 8 in the diagram)in the new biology building.The following distances and two-way l ows are given:a. If there are no restrictions
2. S. L. P. Craft would like your help in developing a layout for a new outpatient clinic to be built in California. From analysis of another recently built clinic, she obtains the data shown in the following diagram. This includes the number of trips made by patients between departments on a
1. Cyprus Citrus Cooperative ships a high volume of individual orders for oranges to northern Europe. The paperwork for the shipping notices is done in the accompanying layout. Revise the layout to improve the l ow and conserve space if possible. Typist Price and extension clerk Files Order clerk
8. How would a l owchart help in planning the servicescape layout? What sorts of features would act as focal points or otherwise draw customers along certain paths through the service? In a supermarket, what departments should be located i rst along the customers’path? Which should be located
7. Consider a department store. Which departments probably should not be located near each other? Would any departments benei t from close proximity?
6. In what respects is facility layout a marketing problem in services? Give an example of a service system layout designed to maximize the amount of time the customer is in the system.
5. Why might it be difi cult to develop a manufacturing cell?
4. What is the essential requirement for mixed-model lines to be practical?
3. How do you determine the idle time percentage from a given assembly-line balance?
2. What is the objective of assembly-line balancing? How would you deal with the situation where one worker, although trying hard, is 20 percent slower than the other 10 people on a line?
1. What kind of layout is used in a physical i tness center?
6 What long-term recommendations would you make?
5 What recommendations would you make for a short-term solution to CBF’s problems?
4 What is the impact of losses in the process in Inspection and Final Test?
3 Analyze the capacity of the process.
2 Diagram the process in a manner similar to Exhibit 7.7.
1 What type of process l ow structure is CBF using?
17. A certain custom engraving shop has traditionally had orders for between 1 and 50 units of whatever a customer orders. A large company has contacted this shop about engraving“reward” plaques (which are essentially identical to each other). It wants the shop to place a bid for this order.
16. The diagram below represents a process where two components are made at stations A1 and A2 (one component is made at A1 and the other at A2). These components are then assembled at station B and moved through the rest of the process, where some additional work is completed at stations C, D, and
15. The Goodparts Company produces a component that is subsequently used in the aerospace industry. The component consists of three parts (A, B, and C) that are purchased from outside and cost 40, 35, and 15 cents per piece, respectively. Parts A and B are assembled i rst on assembly line 1, which
14. AudioCables, Inc., is currently manufacturing an adapter that has a variable cost of $.50 per unit and a selling price of $1.00 per unit. Fixed costs are $14,000. Current sales volume is 30,000 units. The i rm can substantially improve the product quality by adding a new piece of equipment at
13. Owen Conner works part-time packaging software for a local distribution company in Indiana.The annual i xed cost is $10,000 for this process, direct labor is $3.50 per package, and material is $4.50 per package. The selling price will be $12.50 per package. How much revenue do we need to take
12. A i rm is selling two products, chairs and bar stools, each at $50 per unit. Chairs have a variable cost of $25, and bar stools $20. Fixed cost for the i rm is $20,000.a. If the sales mix is 1:1 (one chair sold for every bar stool sold), what is the break-even point in dollars of sales? In
11. Aldo Redondo drives his own car on company business. His employer reimburses him for such travel at the rate of 36 cents per mile. Aldo estimates that his i xed costs per year such as taxes, insurance, and depreciation are $2,052. The direct or variable costs such as gas, oil, and maintenance
10. Assume a i xed cost of $900, a variable cost of $4.50, and a selling price of $5.50.a. What is the break-even point?b. How many units must be sold to make a proi t of $500.00?c. How many units must be sold to average $0.25 proi t per unit? $0.50 proi t per unit?$1.50 proi t per unit?
9. A manufacturing process has a i xed cost of $150,000 per month. Each unit of product being produced contains $25 worth of material and takes $45 of labor. How many units are needed to break even if each completed unit has a value of $90?
8. A book publisher has i xed costs of $300,000 and variable costs per book of $8.00. The book sells for $23.00 per copy.a. How many books must be sold to break even?b. If the i xed cost increased, would the new break-even point be higher or lower?c. If the variable cost per unit decreased, would
7. For each of the following variables, explain the differences (in general) as one moves from a workcenter to an assembly line environment.a. Throughput time (time to convert raw material into product).b. Capital/labor intensity.c. Bottlenecks.
6. The product–process matrix is a convenient way of characterizing the relationship between product volumes (one-of-a-kind to continuous) and the processing system employed by a i rm at a particular location. In the boxes presented below, describe the nature of the intersection between the type
5. How would you characterize the most important difference for the following issues when comparing a workcenter (job shop) and an assembly line?Workcenter Issue (Job Shop) Assembly Line Number of changeovers Labor content of product Flexibility
4. What term is used to mean manufacturing designed to achieve high customer satisfaction with minimum levels of inventory investment?
3. Dell Computer’s primary consumer business takes orders from customers for specii c coni gurations of desktop and laptop computers. Customers must select from a certain model line of computer and choose from available parts, but within those constraints may customize the computer as they
2. The customer order decoupling point determines the position of what in the supply chain?
1. What is the i rst of the three simple steps in the high-level view of manufacturing?
8. Why is it that reducing the number of moves, delays, and storages in a manufacturing process is a good thing? Can they be completely eliminated?
7. What is meant by manufacturing process l ow?
6. How does the production volume affect break-even analysis?
5. It has been noted that during World War II Germany made a critical mistake by having its formidable Tiger tanks produced by locomotive manufacturers, while the less formidable U.S. Sherman tank was produced by American car manufacturers. Use the product–process matrix to explain that mistake
4. What does the product–process matrix tell us? How should the kitchen of a Chinese restaurant be structured?
3. What’s the relationship between the design of a manufacturing process and the i rm’s strategic competitive dimensions (Chapter 2)?
2. What is a customer order decoupling point? Why is it important?
1. What is meant by a process? Describe its important features.
14. A company has just tested the skills of two applicants for the same job. They found that applicant A had a higher learning rate than applicant B. Should they dei nitely hire applicant A?
13. True or False: The only learning for an organization comes from the individual learning of its em ployees.
12. Which industry will typically have a faster learning rate: a repetitive electronics manufacturer or a manufacturer of large complex products such as a shipbuilder?
11. Which type of system is likely to have a faster learning rate—one with primarily highly automated equipment or one that is very labor intensive?
10. United Research Associates (URA) had received a contract to produce two units of a new cruise missile guidance control. The i rst unit took 4,000 hours to complete and cost$30,000 in materials and equipment usage. The second took 3,200 hours and cost $21,000 in materials and equipment usage.
9. Honda Motor Company has discovered a problem in the exhaust system of one of its automobile lines and has voluntarily agreed to make the necessary modii cations to conform with government safety requirements. Standard procedure is for the i rm to pay a l at fee to dealers for each modii cation
8. Lambda Computer Products competed for and won a contract to produce two prototype units of a new type of computer that is based on laser optics rather than on electronic binary bits.The i rst unit produced by Lambda took 5,000 hours to produce and required $250,000 worth of material, equipment
7. Johnson Industries received a contract to develop and produce four high-intensity longdistance receiver/transmitters for cellular telephones. The i rst took 2,000 labor hours and$39,000 worth of purchased and manufactured parts; the second took 1,500 labor hours and $37,050 in parts; the third
6. Lazer Technologies Inc. (LTI) has produced a total of 20 high-power laser systems that could be used to destroy any approaching enemy missiles or aircraft. The 20 units have
5. Jack Simpson, contract negotiator for Nebula Airframe Company, is currently involved in bidding on a follow-up government contract. In gathering cost data from the i rst three units, which Nebula produced under a research and development contract, he found that the i rst unit took 2,000 labor
4. You’ve just completed a pilot run of 10 units of a major product and found the processing time for each unit was as follows:Unit Number Time (hours)1 970 2 640 3 420 4 380 5 320 6 250 7 220 8 207 9 190 10 190a. According to the pilot run, what would you estimate the learning rate to be?b.
3. Omega Technology is starting production of a new supercomputer for use in large research universities. It has just completed the i rst unit, which took 120 labor hours to produce. Based on its experience, it estimates its learning percentage to be 80 percent.How many labor hours should it expect
2. Company Z is just starting to make a brand new product it has never made before. It has completed two units so far. The i rst unit took 12 hours to complete and the next unit took 11 hours. Based only on this information, what would be the estimate of the learning percentage in this process?
1. Firm A typically sees a learning percentage of 85 percent in its processes. Firm B has a learning percentage of 80 percent. Which i rm has the faster learning rate?
10. What difference does it make if a customer wants a 10,000-unit order produced and delivered all at one time or in 2,500-unit batches?
9. One manufacturer has seen a typical learning percentage of 90 percent in the i rm. It has recently found out that a competitor has a percentage of 85 percent. What do you think about this?
7. As a manager, which learning percentage would you prefer (other things being equal), 110 percent or 60 percent? Explain.8. Will the Human Resource Management (HRM) policies of a i rm have much of an effect on the learning rates the i rm may be able to achieve?
6. The learning curve phenomenon has been shown in practice to be widely applicable.Once a company has established a learning rate for a process, they can use it to predict future system performance. Would there be any reason to reevaluate the process’s learning rate once it has been initially
5. As shown in the chapter, the effect of learning in a given system eventually l attens out over time. At that point in the life of a system, learning still exists, though its effect continues to diminish. Beyond that point, is it impossible to signii cantly reduce the time to produce a unit? What
4. Do you think learning curve analysis has an application in a service business like a restaurant?Why or why not?
3. What relationship is there between learning curves and capacity analysis?
2. What relationship is there between learning curves and productivity measurement?
1. How might the following business specialists use learning curves: accountants, marketers, i nancial analysts, personnel managers, and computer programmers?
4 Although i nancial data are sketchy, an estimate from a construction company indicates that adding bed capacity would cost about $100,000 per bed. In addition, the rate charged for the hernia surgery varies between about $900 and $2,000 (U.S. dollars), with an average rate of $1,300 per
3 Now look at the effect of increasing the number of beds by 50 percent. How many operations could the hospital perform per day before running out of bed capacity? (Assume operations are performed i ve days per week, with the same number performed on each day.) How well would the new resources be
2 Develop a similar table to show the effects of adding operations on Saturday. (Assume that 30 operations would still be performed each day.) How would this affect the utilization of the bed capacity?Is this capacity sufi cient for the additional patients? exhibit 5.7 Operations with 90 Beds (30
1 How well is the hospital currently utilizing its beds?
11. Owners of the restaurant in the prior problem anticipate that in one year their demand will double as long as they can provide good service to their customers. How much will they have to increase their service capacity to stay out of the critical zone?
10. Owners of a local restaurant are concerned about their ability to provide quality service as they continue to grow and attract more customers. They have collected data from Friday and Saturday nights, their busiest times of the week. During these time periods about 75 customers arrive per hour
9. A builder has located a piece of property that she would like to buy and eventually build on. The land is currently zoned for four homes per acre, but she is planning to request new zoning. What she builds depends on approval of zoning requests and your analysis of this problem to advise her.
8. Expando, Inc., is considering the possibility of building an additional factory that would produce a new addition to its product line. The company is currently considering two options.The i rst is a small facility that it could build at a cost of $6 million. If demand for new products is low,
7. Suppose that operators have enough training to operate both the bronze machines and the injection molding machine for the plastic sprinklers. Currently AlwaysRain has 10 such employees. In anticipation of the ad campaign described in problem 5, management approved the purchase of two additional
Will this be enough to ensure that enough capacity is available?
6. In anticipation of the ad campaign, AlwaysRain bought an additional bronze machine.
5. Suppose that AlwaysRain Irrigation’s marketing department will undertake an intense ad campaign for the bronze sprinklers, which are more expensive but also more durable than the plastic ones. Forecast demand for the next four years isWhat are the capacity implications of the marketing
4. AlwaysRain Irrigation, Inc., would like to determine capacity requirements for the next four years. Currently two production lines are in place for making bronze and plastic sprinklers. Three types of sprinklers are available in both bronze and plastic: 90-degree nozzle sprinklers, 180-degree
3. Hoosier Manufacturing operates a production shop that is designed to have the lowest unit production cost at an output rate of 100 units per hour. In the month of July, the company operated the production line for a total of 175 hours and produced 16,900 units of output. What was its capacity
2. A company has a factory that is designed so that it is most efi cient (average unit cost is minimized) when producing 15,000 units of output each month. However, it has an absolute maximum output capability of 17,250 units per month, and can produce as little as 7,000 units per month without
1. A manufacturing shop is designed to operate most efi ciently at an output of 550 units per day. In the past month the plant produced 490 units. What was its capacity utilization rate last month?
11. Refer to Exhibit 5.6. Why is it that the critical zone begins at a utilization rate of about 70 percent in a typical service operation? Draw upon your own experiences as either a customer or a server in common service establishments.
10. What are some major capacity considerations in a hospital? How do they differ from those of a factory?
9. Consider the example in Exhibit 5.5. Can you think of anything else you might do with that example that would be helpful to the ultimate decision maker?
8. Will the use of decision tree analysis guarantee the best decision for a i rm? Why or why not? If not, why bother using it?
7. What are some reasons for a plant to maintain a capacity cushion? How about a negative capacity cushion?
6. What is capacity balance? Why is it hard to achieve? What methods are used to deal with capacity imbalances?
5. Management may choose to build up capacity in anticipation of demand or in response to developing demand. Cite the advantages and disadvantages of both approaches.
4. At i rst glance, the concepts of the focused factory and capacity l exibility may seem to contradict each other. Do they really?
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