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Operations Management Creating Value Along The Supply Chain 6th Edition Roberta Russell, Bernard W Taylor - Solutions
5-45. In Problem 5-26(a), suppose arriving truck drivers look to see how many trucks are waiting to be weighed at the weigh station. If they see four or more trucks in line, they will pass by the station and risk being caught and ticketed. What is the probability that a truck will pass by the
5-44. The management of Universal Manufacturing Company(Problem 5-30) likes to have its operators working 90% of the time. What must the assembly line arrival rate be in order for the operators to be as busy as management would like?
5-38. In Problem 5-22 suppose that Huang's television-repair service cannot accommodate more than 10 TV sets at a time (under repair and waiting for service). What is the probability that the number of TV sets on hand will ex-ceed the shop capacity?
5-34. In Problem 5-3, the head of the Management Department at Tech is considering the addition of a second advisor in the college advising office to serve students waiting to have their schedules approved. This new advisor could serve the same number of students per hour as the present
5-22. Huang's television-repair service receives an average of four TV sets per eight-hour day to be repaired. The service man-ager would like to be able to tell customers that they can ex-pect their TV back in 3 days. What average repair time per set will the repair shop have to achieve to provide
5-20. What types of waiting line systems have constant service times?
5-14. Describe the traditional cost relationship in waiting line analysis.
5-13. List the elements that define a queuing system.
5-6.Give five examples of real-world queuing systems with fi-nite calling populations.
As a regional sales manager, Nora Burke travels frequently and relies on her cell phone to keep up to date with clients.She has tried three different service providers, Airway, Bellular, and CyCom, with varying degrees of success.The number of failures in a typical eight-hour day and the average
A broadcasting station has five major subsystems that must all be operational before a show can go on the air. If each subsystem has the same reliability, what reliability would be required to be 95% certain of broadcast success? 98%certain? 99% certain?
Competition for a new generation of computers is so intense that MicroTech has funded three separate design teams to create the new systems. Due to varying capabilities of the team members, it is estimated that team A has a 95 percent probability of coming up with an acceptable design before the
Omar Marquez is the audio engineer for Summer Musical Enterprises. The group is considering the purehase of a new sound system consisting of five separate components.The components are arranged in series with identical reliabilities.The Basic system with component reliabilities of 80% costs $1000,
MagTech assembles tape players from four major components arranged as follows:The components can be purchased from three different vendors, who have supplied the following reliability data:Vendor Component 1 Zz 3 AB CD 4-13.CASE PROBL 0.94 0.86 0.90 0.93 0.92 0.90 0.95 0.90 0.85 0.88 0.93 0.95a. If
The Management Department recently purchased a small copier for faculty use. Although the workload of the office staff has improved somewhat, the secretaries are still making too many trips to the Dean’s office when the departmental copier is out of service. Sylvia, the departmental secretary,
If it costs $1000 for each 90% reliable component, $1500 for each 93% component, $2000 for each 95% reliable component, and $10,000 to replace a failed system, which system would you choose, a or b? c or d?
Examine the systems given below. Which system is more reliable, a or b? c or d? Now calculate the reliability of each system. Were your perceptions correct?
La Pied manufactures high-quality orthopedic shoes. Over the past five years, the general public has “found” La Pied products, and sales have skyrocketed. One unanticipated result has been a sharp increase in factory returns for repair, since local shoe repair shops do not have the materials or
An alternative airplane design is given here. Follow the assembly instructions and test the airplane. Are the instructions clear? Compare the performance of this airplane design with the one described in Problem 4-7. Which plane was easier to construct? How would you improve the design of this
Create a QFD example from your own experience.Describe the product or service to be designed and then complete a house of quality using representative data.Explain the entries in the house and how target values were reached. Also, describe how other houses might flow from the initial house you
Nadia Algar is the overworked IT resource person for her department. In the next round of computer purchases, she is determined to recommend a vendor who does a better job of documenting possible errors in the system and whose customer service line is more responsive to the needs of her colleagues.
4-5.Place for scorecard/pencil Easy to clean Attractive Construct a house of quality for golf bags. Then write a brief report to Mr. Palmer recommending revisions to the current golf bag design and explaining how those recommendations were determined.
The PlayBetter Golf Company has experienced a steady decline in sales of golf bags over the past five years. The basic golf bag design has not changed over that period, and PlayBetter’s CEO, Jack Palmer, has decided that the time has come for a customer-focused overhaul of the product. Jack read
Glen Evans is an emergency medical technician for a local rescue team and is routinely called on to render emergency cafe to citizens facing crisis situations. Although Glen has received extensive training, he also relies heavily on his equipment for support. During a normal call, Glen uses five
4-1. Karen Perez runs an office supply store that also performs simple office services, such as copying. It is time to purchase a new high-speed copier and Karen has learned that machine uptime is a critical factor in selection. She has gathered the following data on reliability and maintainability
BusinessWeek sponsors a best design competition each year. Read about this year’s winners and write a brief summary about what makes these designs special.Find out if your university benchmarks itself against other universities. If so, write a summary of the characteristics that are considered,
Look around your classroom and make a list of items that impede your ability to learn. Classify them as problems in quality of design or quality of conformance.
Explain how simplification and improve designs. How does modular design differ from standardization can standardization?
Construct a perceptual map for the following products or services: (a) business schools in your state or region,(b) software packages, and (c) video rental stores. Label the axes with the dimensions you feel are most relevant.Explain how perceptual maps are used.How can design teams improve the
Sometimes failures provide the best opportunities for new products and services. Read the Post-It Note story at http://www.3m.com. Search the Net for at least one other failure-to-success story.
Differentiate between performance specifications, design specifications, and manufacturing specifications. Write sample specifications for a product or service of your choosing.
Link to the International Standards Organization http://www.iso.org and explore ISO 14000. What do these standards entail? How were they developed? How does a company attain ISO 14001 certification? Why would they want to?
What does design for manufacture entail? List several techniques that can facilitate the DFM process.
How does CAD relate to CAE and CAM? How do CAD and the Internet promote collaborative design?*
How are the studies conducted? If possible, access one of the free benchmarking reports and summarize its findings.
What types of things do these organizations benchmark?
Read about benchmarking at the American Productivity and Quality Center http://www.apqce.org and the Benchmarking Exchange http://www.benchnet.com. What is benchmarking?
What kinds of analyses are conducted in a feasibility study for new products?
4-9. Describe the objectives of failure mode and effect analysis, fault tree analysis, and value analysis. Apply one of the techniques to a project, computer assignment, or writing assignment you have recently completed.
4-8. What is the purpose of QFD? Find out if companies really use QED by visiting the QFD Institute http://www.qfdi.org and summarizing one of their case studies.
4-7. Search the Internet for two or more companies that design for environment. What are the main components of each company’s green design initiative? How do their approaches differ?
4-6. Discuss the concept of robust design. Give an example of a robust product or service.
4-5. Automakers often post concept cars on their Web sites. Find out how the design process for these cars differs. Which cars do you think will be commercially successful? Why?
4-4. Access the Environmental Protection Agency _http://www.epa.gov/ to read about the U.S. government’s commitment to environmental product design. Compare the U.S.approach to that of other countries.
4-3. Describe the strategic significance of design. How can organizations gain a competitive edge with product or service design?
4-2. How are reliability and maintainability related? Give an example for a product or service you have experienced.
4-1. Give an example of a product or service you have encountered that was poorly designed. Read about more bad designs at the bad designs Web site http://www.baddesigns.com.Make a list of the factors that make a design unworkable.
S3-5. The Metro Packaging Company in Richmond produces clear plastic bottles for the Kooler Cola Company, a soft-drink manufacturer. Metro inspects each lot of 5000 bottles before they are shipped to the Kooler Company. The soft-drink company has specified an acceptable quality level of 0.06 and a
S3-4. The Great Lakes Company, a grocery store chain, pur-chases apples from a produce distributor in Virginia. The grocery company has an agreement with the distributor that it desires shipments of 10.000 apples with no more than 2% defectives (i.e ., severely blemished apples).although it will
S3-3. The Fast Break Computer Company assembles personal computers and sells them to retail outlets. It purchases key-boards for its PCs from a manufacturer in the Orient. The keyboards are shipped in lots of 1000 units, and when they arrive at the Fast Break Company samples are inspected.Fast
S3-2. The Academic House Publishing Company sends out the textbooks it publishes to an independent book binder, When the bound books come back, they are inspected for defective bindings (e.g ., warped boards, ripples, cuts, poor adhesion). The publishing company has an acceptable quality level of
S3-1. A department store in Beijing, China, has arranged to pur-chase specially designed sweatshirts with the Olympic logo from a clothing manufacturer in Hong Kong. When the sweatshirts arrive in Beijing in lots of 2000 units, they are inspected. The store's management and manufacturer have agreed
S3-7. What is the difference between acceptance sampling and process control?
53-6. Explain the difference between single -, double -, and multiple-sampling plans.
S3-5. Under what circumstances is the total inspection of final products necessary?
53-4. How does the AQL relate to producer's risk (c) and the LTPD relate to consumer's risk (B)?
S3-3. How is the sample size determined in a single-sample attribute plan?
S3-2. Why are sample sizes for attributes necessarily larger than sample sizes for variables?
S3-1. Why is the traditional view of quality control reflected in the use of acceptance sampling unacceptable to ad-herents of quality management and continuous improvement?
Describe the different quality-control methods that Rainwater Brewery might use to ensure good-quality beer and how these methods might fit into an overall quality management program.
3-8. At Samantha’s Super Store the customer service area processes customer returns, answers customer questions and provides information, addresses customer complaints, and sells gift certificates. The manager believes that if customers must wait longer than 8 minutes to see a customer service
Martha’s Wonderful Cookie Company makes a special super chocolate-chip peanut butter cookie. The company would like the cookies to average approximately eight chocolate chips apiece. Too few or too many chips distort the desired cookie taste. Twenty samples of five cookies each during a week have
3-7.HEwloOONeeeO_ NO=z( —]Number of Number of Defects Defects 7 11 14 14 12 10 6 13 11 S 14 12 12 15 9 3 16 13 11 17 7 7 18 15 7 19 11 8 20 16 Construct the appropriate control chart for this maintenance process using 3o limits and indicate if the process was out of control at any time. If the
An important aspect of customer service and satisfaction at the Big Country theme park is the maintenance of the restrooms throughout the park. Customers expect the restrooms to be clean; odorless; well stocked with soap, paper towels, and toilet paper; and to have a comfortable temperature. In
The Stryker Baseball Bat Company manufactures wooden and aluminum baseball bats at its plant in New England.Wooden bats produced for the mass market are turned on a lathe, where a piece of wood is shaped into a bat with a handle and barrel. The bat is cut to its specified length and then finished
3-4. The City Square Grocery and Meat Market has a large meat locker in which a constant temperature of approximately 40°F should be maintained. The market manager has decided to construct an R-chart to monitor the temperature inside the locker. The manager had one of the market employees take
3-3. The Road King Tire Company in Birmingham wants to monitor the quality of the tires it manufactures. Each day the company quality-control manager takes a sample of 100 tires, tests them, and determines the number of defective tires. The results of 20 samples have been recorded as follows:Number
3-2. A machine at the Pacific Fruit Company fills boxes with raisins. The labeled weight of the boxes is 9 ounces. The company wants to construct an R-chart to monitor the filling process and make sure the box weights are in control.The quality-control department for the company sampled five boxes
The family of a patient at County General Hospital complained when the patient fell in the hospital and broke her hip.The family was threatening a lawsuit, and there had been some negative publicity about the hospital in the local media Suggesting that patient falls might be common. The hospital
Why have companies traditionally used control charts with 3-sigma limits instead of 2-sigma limits?
Visit a local fast-food restaurant, retail store, grocery store, or bank, and identify the different processes that control charts could be used to monitor.
For the Goliath Tool Company in Example 3.4, if the design tolerances are +0.07 cm, is the process capable of meeting tolerances of +0.08 cm for the slip-ring bearings?
Select three service companies or organizations you are familiar with and indicate how process control charts could be used in each.
3-6. Explain the difference between attribute control charts and variable control charts.
3-5. What determines the width of the control limits in a process chart?
3-4. How are mean (x-) and range (R-) charts used together?
3-3. Under what circumstances should a c-chart be used instead of a p-chart?
3-2. What is the difference between tolerances and control limits?
3-1. Explain the different information provided by the process capability ratio and the process capability index.
2-14. Compute the quality—productivity ratio (QPR) for the Burger Doodle restaurant in parts (a) and (b) in Problem 2-12.a. Why do you think Mr. Watson organized the customer survey the way he did? What other things do you think he might have done to analyze the stores’ quality problems?b.
In Problem 2-6, the Colonial House Furniture Company has investigated the manufacturing process to identify potential improvements that would improve quality. The company has identified four alternatives, each costing$15,000, as follows.Alternative Quality Improvement 1 Stage 1: 93%2 Stage 2: 96%,
Burger Doodle is a fast-food restaurant that processes an average of 680 food orders each day. The average cost of each order is $6.15. Four percent of the orders are incorrect, and only 10% of the defective orders can be corrected with additional food items at an average cost of $1.75. The
The Backwoods American company in Problem 2-5 produces approximately 20,000 parkas annually. The qualitymanagement program the company implemented was able to improve the average percentage of good parkas produced by 2% each year, beginning with 83% good-quality parkas in 2003. Only about 20% of
The total processing cost for producing the X-Pacer running shoe in Problem 2-4 is $18. The Omega Shoe Company starts production of 650 pairs of the shoes weekly, and the average weekly yield is 90%, with 10% defective shoes. One quarter of the defective shoes can be reworked at a cost of $3.75.a.
The Blue Parrot is an expensive restaurant in midtown open only for dinner. Entrees are set at a fixed price of $42.In a typical month the restaurant will serve 3,600 entrees.Monthly variable costs are $61,200, and fixed costs are$31,000 per month. Customers or waiters send back 8% of the entrees
The Backwoods American company operates a telephone order system for a catalogue of its outdoor clothing products.The catalogue orders are processed in three stages. In the first stage, the telephone operator enters the order into the computer; in the second stage, the items are secured and batched
In Problem 2-2, if the direct manufacturing cost for cabinets is $27 and the rework cost is $8, compute the manufacturing cost per good product. Determine the manufacturing cost per product if the percentage of good-quality file cabinets is increased from 83% to 90%.
2-6. The Colonial House Furniture Company manufactures four-drawer oak filing cabinets in six stages. In the first stage, the boards forming the walls of the cabinet are cut;in the second stage, the front drawer panels are woodworked;in the third stage, the boards are sanded and finished; in the
2-5. Backwoods American, Inc., produces expensive waterrepellent, down-lined parkas. The company implemented a total quality-management program in 2002. Following are quality-related accounting data that have been accumulated for the five-year period after the program’s start.Year 2003 2004 2005
The Omega Shoe Company manufactures a number of different styles of athletic shoes. Its biggest seller is the XPacer running shoe. In 2005 Omega implemented a quality-management program. The company’s shoe production for the past three years and manufacturing costs are as follows.Year 2005 2006
Develop a cause-and-effect diagram for this process of washing clothes. Next develop a cause-and-effect matrix and use your own insight and judgment about the process to rank and weight the output (Y) variables, assign a numerical score to each X-Y combination, develop overall scores for each X
A black belt has identified the following key input (X) and output (Y) variables for the process of laundering your clothes in your washing machine at home:Input (X ) Variables Output (Y) V ariables Sort laundry Clothes clean Cycle Clothes not damaged Wash temperature Colors okay Rinse temperature
The Colonial House Furniture Company manufactures two-drawer oak file cabinets that are sold unassembled through catalogues. The company initiates production of 180 cabinet packages each week. The percentage of goodquality cabinets averages 83% per week, and the percentage of poor-quality cabinets
Airphone, Inc., manufactures cellular telephones at a processing cost of $47 per unit. The company produces an average of 250 phones per week and has a yield of 87%good-quality phones, resulting in 13% defective phones, all of which can be reworked. The cost of reworking a defective telephone is
Include goals for quality improvement and ways to measure success.
Develop a hypothetical quality-improvement program for the class in which you are using this textbook. Evaluate the class according to the dimensions of quality for a service.
What traits of quality management are generally consistent among most current quality philosophies and trends?
Select two competing service companies that you are familiar with or can visit, such as fast-food restaurants, banks, or retail stores, and compare how they interact with customers in terms of quality.
Identify three Web sites that you think are poor-quality and three that are good-quality. What common characteristics are exhibited by the group of poor-quality sites? the group of good-quakity sites ’.Compare the two groups.
A number of quality-management philosophies hold that prevention costs are the most critical quality-related costs.Explain the logic behind this premise.
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