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Operations Management 10th Edition Jay Heizer, Barry Render - Solutions
Maurice Browne recorded the following times assem- bling a watch. Determine (a) the average time, (b) the normal time, and (c) the standard time taken by him, using a performance rating of 95% and a personal allowance of 8%. Assembly Times Recorded Observation Time Observation Time No. (minutes)
Refer to Problem 10.13.a) If the allowance factor is 15%, what is the standard time for this operation?b) If the allowance factor is 18% and the performance rating is now 90%, what is the standard time for this operation? P ..
The better students at Baltimore Assessment Center (see Problem E.12) have an 80% learning curve and can do a task in 20 minutes after just six times. You would like to weed out the weak students sooner and decide to evaluate them after the third unit. How long should the third unit take?
If Charlene, the worker in Problem 10.13, has a per- formance rating of 90%, what is the normal time for the operation? Is she faster or slower than normal?
If Charlene Brewster has times of a performance rating of 110%, what is the normal time for this operation? Is she faster or slower than normal? P
Your campus club is hosting a car wash. Due to demand, three people are going to be scheduled per wash line. (Three people have to wash each vehicle.) Design an activity chart for washing and drying a typical sedan. You must wash the wheels but ignore the cleaning of the interior, because this part
Draw an activity chart for washing the dishes in a double-sided sink. Two people participate, one washing, the other rinsing and drying. The rinser dries a batch of dishes from the drip rack as the washer fills the right sink with clean but unrinsed dishes. Then the rinser rinses the clean batch
Rate a job you have had using Hackman and Oldham's core job characteristics (see page 419) on a scale from 1 to 10.What is your total score? What about the job could have been changed to make you give it a higher score?
Dynamic RAM Corp. produces semiconductors and has a learning curve of .7. The price per bit is 100 millicents when the volume is .7 x 1012 bits. What is the expected price at 1.4 102 bits? What is the expected price at 89.6 10 bits? 00
Draw an activity chart (a crew chart similar to Figure 10.6) for a concert (for example, Nickelback, Linkin Park, Lil'Wayne, or Bruce Springsteen) and determine how to put together the concert so the star has reasonable breaks. For instance, at what point is there an instrumental number, a visual
Draw an activity chart for a machine operator with the following operation. The relevant times are as follows:Prepare mill for loading (cleaning, oiling, and so on) Load mill Mill operating (cutting material) Unload mill .50 min 1.75 min 2.25 min .75 min
Make a process chart for changing the right rear tire or an automobile.
If you were redesigning the jobs described in Question 2, what changes would you make? Are your changes realistic? Would they improve productivity (not just production but productivity)?
Before considering a product-oriented layout, it is important to be certain that:a) b) 7308c) d) LOS. An assembly line is to be designed for a product whose comple- tion requires 21 minutes of work. The factory works 400 minutes per day. Can a production line with five workstations make 100 units
Central Power owns 25 small power generating plants. It has contracted with Genco Services to overhaul the power tur- bines of each of the plants. The number of hours that Genco billed Central to complete the third turbine was 460.Central pays Genco $60 per hour for its services. As the maintenance
A fixed-position layout:a) groups workers to provide for movement of information.b) addresses the layout requirements of large, bulky projects such as ships and buildings.c) seeks the best machine utilization in continuous production.d) allocates shelf space based on customer behavior.e) deals with
The major problem addressed by the warehouse layout strategy is:a) minimizing difficulties caused by material flow varying with each product.b) requiring frequent contact close to one another.c) addressing trade-offs between space and material handling.d) balancing product flow from one workstation
How would you measure the "efficiency" of this layout?
What suggestions would you make to Bob Collins about his layout?
What analytical techniques are available to help a company like Wheeled Coach deal with layout problems?
The concept of servicescapes is discussed in this chapter. Describe why this is so important at Arnold Palmer Hospital and give examples of its use in layout design.
Figure 9.23 illustrates an architect's drawing of Arnold Palmer Hospital's new circular pod system. If nurse Susan Jones's day includes 7 trips from the nursing pod to each of the 12 rooms (back and forth), 20 trips to central medical supply, 6 trips to the break room, and 12 trips to the pod linen
Figure 9.22 illustrates a sample linear hallway layout. During a period of random observation, nurse Thomas Smith's day includes 6 trips from the nursing station to each of the 12 patient rooms (back and forth), 20 trips to the medical supply room, 5 trips to the break room, and 12 trips to the
What are the advantages of the circular pod design over the tradi- tional linear hallway layout found in most hospitals?
Identify the many variables that a hospital needs to consider in layout design.
How would you suggest modifying the process to accommodate 120 applications per hour? What is the cost per application of this new configuration?
If the second clerk could be added anywhere you choose (and not necessarily to check for violations, as in question 2), what is the maximum number of applications the process can handle? What is the new configuration?
How many applications can be processed per hour if a second clerk is added to check for violations?
What is the maximum number of applications per hour that can be handled by the present configuration of the process?
Under what conditions do you think Hard Rock prefers to fran- chise a cafe?
Why does Hard Rock put such serious effort into its location analysis?
Which is the highest rated of the four European cities under con- sideration, using the table above?
From Munday's Standard Market Report checklist, select any other four categories, such as population (A1), hotels (B2), or restaurants/nightclubs (D), and provide three subcategories that should be evaluated. (See item C1 (airport) for a guide.)
Red Lobster also defines its trade areas based on market size and population density. Here are its seven density classes:
What are the major differences in site location for a restaurant vs. a retail store vs. a manufacturing plant?
Visit the Web site for MapInfo (www.mapinfo.com). Describe the psychological profiling (PSYTE) clustering system. Select an industry, other than restaurants, and explain how the software can be used for that industry.
Which alternative would you recommend, under which circumstances?
This is a long-term, strategic decision; what factors might change in the next 10 to 20 years? How will this influence the decision?
Why is transportation infrastructure so important in this decision?
The service times for a new data entry clerk have been measured and sequentially recorded as shown below: Report Time (minutes) 12345678 66 56 53 48 47 45 44 41a) What is the learning curve rate, based on this information?b) Using an 85% learning curve rate and the above times, estimate the length
What other relevant factors that are not mentioned in this case study might play a role in this decision?
What advantages and disadvantages does each potential location offer?
The EU has made changes in airline regulation that dra- matically affect major European carriers such as British International Air (BIA), KLM, Air France, Alitalia, and Swiss International Air.With ambitious expansion plans, BIA has decided it needs a second service hub on the continent, to
Eagle Electronics must expand by building a second facility. The search has been narrowed down to locating the new facility in one of four cities: Atlanta (A), Baltimore (B), Chicago (C), or Dallas (D). The factors, scores, and weights follow: Scores by Site Weight (W) A B C D 5 4 5 i Factor 1
A small rural county has experienced unprecedented growth over the past 6 years, and as a result, the local school district built the new 500-student North Park Elementary School. The dis- trict has three older and smaller elementary schools: Washington, Jefferson, and Lincoln. Now the growth
A chain of home health care firms in Louisiana needs to locate a central office from which to conduct internal audits and other periodic reviews of its facilities. These facilities are scattered through- out the state, as detailed in the following table. Each site, except for Houma, will be visited
The following table gives the map coordinates and the shipping loads for a set of cities that we wish to connect through a central hub.City A Map Coordinate (x, y) (5,10) Shipping Load B (6,8) (4,9) D (9.5) 5 10 15 5 E (7,9) F (3,2) (2,6) 15 10 5 Ga) Near which map coordinates should the hub be
Audi Motors is considering three sites-A, B, and C- at which to locate a factory to build its new-model automobile, the Audi SUV XL500. The goal is to locate at a minimum-cost site, where cost is measured by the annual fixed plus variable costs of production. Audi Motors has gathered the following
If the first unit of a production run takes I hour and the firm is on an 80% learning curve, how long will unit 100 take? (Hint: Apply the coefficient in Table E.3 twice.)....E.25 Using the accompanying log-log graph, answer the fol- lowing questions:a) What are the implications for management if
Peter Billington Stereo, Inc., supplies car radios to auto manufacturers and is going to open a new plant. The company is undecided between Detroit and Dallas as the site. The fixed costs in Dallas are lower due to cheaper land costs, but the variable costs in Dallas are higher because shipping
The fixed and variable costs for three potential manu- facturing plant sites for a rattan chair weaver are shown: Site 1 3 Fixed Cost per Year $ 500 1,000 1,700 Variable Cost per Unit $11 7a) Over what range of production is each location optimal?b) For a production of 200 units, which site is best?
A British hospital chain wishes to make its first entry into the U.S. market by building a medical facility in the Midwest, a region with which its director, Doug Moodie, is comfortable because he got his medical degree at Northwestern University. After a preliminary analysis, four cities are
An American consulting firm is planning to expand glob- ally by opening a new office in one of four countries: Germany, Italy, Key Success Factors Level of education Candidate Country Ratings Weight Germany Italy Spain Greece Number of consultants .05 5 5 5 2 National literacy rate .05 4 2 1 1
Daniel Tracy, owner of Martin Manufacturing, must expand by building a new factory. The search for a location for this factory has been narrowed to four sites: A, B, C, or D. The follow- ing table shows the results thus far obtained by Tracy by using the factor-rating method to analyze the problem.
Thomas Green College is contemplating opening a European campus where students from the main campus could go to take courses for 1 of the 4 college years. At the moment, it is consid- ering five countries: Holland, Great Britain, Italy, Belgium, and Greece. The college wishes to consider eight
A company is planning on expanding and building a new plant in one of three Southeast Asian countries. Chris Ellis, the manager charged with making the decision, has determined that five key success factors can be used to evaluate the prospective coun- tries. Ellis used a rating system of 1 (least
Consolidated Refineries, headquartered in Houston, must decide among three sites for the construction of a new oil- processing center. The firm has selected the six factors listed below. as a basis for evaluation and has assigned rating weights from 1 to 5 on each factor: Factor 1 2 3 4 56 Factor
A location analysis for Temponi Controls, a small man- ufacturer of parts for high-technology cable systems, has been nar- rowed down to four locations. Temponi will need to train assemblers, testers, and robotics maintainers in local training centers. Cecilia Temponi, the president, has asked each
Marilyn Helm Retailers is attempting to decide on a location for a new retail outlet. At the moment, the firm has three alternatives stay where it is but enlarge the facility; locate along the main street in nearby Newbury; or locate in a new shopping mall in Hyde Park. The company has selected the
What are the advantages and disadvantages to IBM and SMT from this approach?
Insurance Company of Latin America (ILA) is consid- ering opening an office in the U.S. The two cities under considera- tion are Philadelphia and New York. The factor ratings (higher scores are better) for the two cities are given in the following table. In which city should ILA locate? Weight
Gayla Delong owns the Oklahoma Warriors, a minor league baseball team in northwest Oklahoma. She wishes to move the Warriors east, to either Atlanta or Charlotte. The table below gives the factors that Gayla thinks are important, their weights, and the scores for Atlanta and Charlotte. Weight
Subway, with more than 20,000 outlets in the U.S., is plan- ning for a new restaurant in Buffalo, New York. Three locations are being considered. The following table gives the factors for each site. Baptist Northside Factor Weight Maitland Church Mall Space Costs .25 Traffic density .20
How does SMT's proposed learning rate compare with that of other industries?
Refer to Problem 8.3. If the final destination is New Delhi, India, and there is a 30% import tax, which firm should you choose?
Refer to Problem 8.1. Shipping cost from Cambodia to Denver, Colorado, the final destination, is $1.50 per unit. Shipping cost from China to Denver is $1 per unit, while the shipping cost from Billings to Denver is $.25 per unit. Considering both labor and transportation costs, which is the most
What are the limitations of the learning curve in this case?
Elmer's Fudge Factory is planning to open 10 retail outlets in Oregon over the next 2 years. Identify (and weight) those fac- tors relevant to the decision. Provide this list of factors and weights.
Contrast the location of a food distributor and a supermarket. (The distributor sends truckloads of food, meat, produce, etc., to the supermarket.) Show the relevant considerations (factors) they share; show those where they differ.
List factors, other than globalization, that affect the location decision. locations.
Although most organizations may make the location decision infrequently, there are some organizations that make the deci- sion quite regularly and often. Provide one or two examples. How might their approach to the location decision differ from the norm?
List the techniques used by service organizations to select country in which to locate?
What are the major factors that firms consider when choosing a
Why shouldn't low wage rates alone be sufficient to select a location?
"Manufacturers locate near their resources, retailers locate near their customers." Discuss this statement, with reference to the proximity-to-markets arguments covered in the text. Can you think of a counterexample in each case? Support your choices.
What are the three steps to locational break-even analysis?
Explain the assumptions behind the center-of-gravity method. How can the model be used in a service facility location?
A surgical procedure with a 90% learning curve required 20 hours for the initial patient. The fourth patient should require approxi- mately how many hours?a) 18b) 16.2c) 28d) 30e) 54.2
Provide two examples of clustering in the service sector.
What are the advantages and disadvantages of a qualitative (as opposed to a quantitative) approach to location decision making?
What is clustering?
The first transmission took 50 hours to rebuild at Bob's Auto Repair, and the learning rate is 80%. How long will it take to rebuild the third unit? (Use at least three decimals in the exponent if you use the logarithmic approach.)a) under 30 hoursb) about 32 hoursc) about 35 hoursd) about 60
Why do so many foreign companies build facilities in the U.S.?
Why do so many U.S. firms build facilities in other countries?
How is FedEx's location a competitive advantage? Discuss.
In the simulation of an order policy for drills at Simkin's hard- ware (Example F3, pp. 793-795), would the results (of Table F.10) change significantly if a longer period were simulated? Why is the 10-day simulation valid or invalid?
The daily demand for tuna sandwiches at a Roosevelt University cafeteria vending machine is either 8, 9, 10, or 11, with prob- abilities 0.4, 0.3, 0.2, or 0.1, respectively. Assume the following random numbers have been generated: 09, 55, 73, 67, 53, 59, 04, 23, 88, and 84.Using these numbers,
The table below shows the partial results of a Monte Carlo simulation. Assume that the simulation began at 8:00 A.M. and there is only one server.a) When does service begin for customer number 3?b) When will customer number 5 leave?c) What is the average waiting time in line?d) What is the average
Children's Hospital is studying the number of emer gency surgery kits that it uses on weekends. Over the last 40 week ends the number of kits used is as follows:The following random numbers have been generated: 11, 52, 59, 22, 03, 03, 50, 86, 85, 15, 32, 47.Simulate 12 nights of emergency kit
Susan Sherer's grocery store has noted the following figures with regard to the number of people who arrive at the store's three checkout stands and the time it takes to check them out:Simulate the utilization of the three checkout stands over 5 min- utes, using the following random numbers: 07,
Phantom Controls monitors and repairs control cir- cuit boxes on elevators installed in multistory buildings in down- town Chicago. The company has the contract for 108 buildings. When a box malfunctions, Phantom installs a new one and rebuilds the failed unit in its repair facility in Gary,
The number of cars arriving at Terry Haugen's Car Wash during the last 200 hours of operation is observed to be the following:a) Set up a probability and cumulative-probability distribution for the variable of car arrivals.b) Establish random-number intervals for the variable.c) Simulate 15 hours
Leonard Presby's newsstand uses naive forecasting to order tomorrow's papers. The number of newspapers ordered corre- sponds to the previous day's demands. Today's demand for papers was 22.Presby buys the newspapers for $.20 and sells them for $.50. Whenever there is unsatisfied demand, Presby
Simkin's Hardware simulated an inventory-ordering policy for Ace electric drills that involved an order quantity of 10 drills, with a reorder point of 5.This first attempt to develop a cost- effective ordering strategy was illustrated in Table F.10 of Example F3 (on p. 826). The brief simulation
How many Christmas trees should Hans order? Develop an Excel-based simulation model to support your decision.
Hans is considering moving to an upscale new neighborhood. The new neighborhood's demand would follow a normal distrib- ution, with a mean of 750 and standard deviation of 100.What would be his expected profit now? Should he move?
Define capacity 314 Compute break-even 325 L02. Determine design capacity, effective capacity, and utilization 316 Determine expected monetary value of a capacity decision 329
Perform bottleneck analysis 320
Compute net present value 331
What is efficiency?
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