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business
operations management 6th
Operations Management An Integrated Approach 2nd Edition R. Dan Reid ,Nada R. Sanders - Solutions
Find an example of successful TQM implementation.
Explain the importance of total quality management in JIT.
Find an example of successful JIT manufacturing.
Explain how JIT manufacturing works and its key ele- ments.
Identify the three major elements of JIT.
Describe the core beliefs of the JIT philosophy.
Given your findings, what advice would you give Jose?
Are both materials equally subject to the defects?
Prepare a three-sigma control chart for both production processes, using the new and standard material (use the quality report in Delta Plastics, Inc. Case A, Chapter 5). Are both processes in control? What can you conclude?
What advice would you give to Larraine based on the information that you have?
Based on your analysis do you think the problem is the new computer system or something else?
Is the process in control? Why?
Set up three-sigma control limits with the given data.
The Crunchy Potato Chip Company sells chips in boxes with a net weight of 30 ounces per box (850 grams). Each box contains 10 individual 3-ounce packets of chips. Product design specifications call for the packet-filling process average to be set at 86.0 grams so that the average net weight per box
The Crunchy Potato Chip Company packages potato chips in a process designed for 10.0 ounces of chips with an up- per specification limit of 10.5 ounces and a lower specification limit of 9.5 ounces. The packaging process results in bags with an average net weight of 9.8 ounces and a standard
Breeze Toothpaste Company has been having a problem with some of the tubes of toothpaste leaking. The tubes are packed in containers with 100 tubes each. Ten containers of toothpaste have been sampled. The following number of tooth- paste tubes were found to have leaks: Number of Number of Sample
Breeze Toothpaste Company makes tubes of toothpaste. The product is produced and then pumped into tubes and capped. The production manager is concerned whether the fill-ing process for the tubes of toothpaste is in statistical control. The process should be centered on 6 ounces per tube. Six sam-
Joshua Simms has recently been placed in charge of pur- chasing at the Med-Tech Labs, a medical testing laboratory. His job is to purchase testing equipment and supplies. Med-Tech currently has a contract with a reputable supplier in the indus- try. Joshua's job is to design an appropriate
A computer manufacturer purchases microchips from a world-class supplier. The buyer has a lot tolerance proportion defective of 10 parts in 5000, with a consumer's risk of 15%. If the computer manufacturer decides to sample 2000 of the mi- crochips received in each shipment, what acceptance
The Fresh Pie Company purchases apples from a local farm to be used in preparing the filling for their apple pies. Sometimes the apples are fresh and ripe. Other times they can be spoiled or not ripe enough. The company has decided that they need an acceptance sampling plan for the purchased ap-
Develop an OC curve for a sampling plan in which a sample of n 10 items is drawn from lots of N = 1000. The accept/reject criteria is set up in such a way that we accept a lot if no more than one defect (c = 1) is found.
Quality Style manufactures self-assembling furniture. To reduce the cost of returned orders, the manager of its quality control department inspects the final packages each day using randomly selected samples. The defects include wrong parts, missing connection parts, parts with apparent painting
Develop an OC curve for a sampling plan in which sample of 5 items is drawn from lots of N 1000 items. The accept/reject criteria are set up in such a way that we accept a lot if no more than one defect (e) is found.
Compute the C,, measure of process capability for the following machine and interpret the findings. What value would you have obtained with the C, measure? Machine Data: USL = 100 LSL = 70 Process 0 = 5 Process = 80
Three ice cream packing machines at the Creamy Treat Company are being evaluated for their capability. The following data are recorded: Packing Machine Standard Deviation A oD, B BS) c 05 If specifications are set between 15.8 and 16.2 ounces, determine which of the machines are capable of
University Hospital has been concerned with the number of errors found in its billing statements to patients. An audit of 100 bills per week over the past 12 weeks revealed the following number of errors: Week Number of Errors 1 4 2: 5 3 6 4 6 5 3 6 2 7 6 8 7 9 3 10 4 ll 3 12 4 (a) Develop control
U-learn University uses a c-chart to monitor student complaints per week. Complaints have been recorded over the past 10 weeks. Develop three-sigma control limits using the following data:Week Number of Complaints 1 0 2) 3 3 1 4 ] 5) 0 6 0 7 3 8 1 o 1 10 7
A tire manufacturer has been concerned about the number of defective tires found recently. In order to evaluate the true magnitude of the problem, a production manager selected ten random samples of 20 units each for inspection. The number of defective tires found in each sample are as follows:
A production manager at a Contour Manufacturing plant has inspected the number of defective plastic molds in 5 random samples of 20 observations each. Following are the number of defective molds found in each sample: Number of Number of Observations Sample Defects in Sample 1 I 20 2 2) 20 3 2 20 4
The Awake Coffee Company produces gourmet instant coffee. The company wants to be sure that the average fill of coffee containers is 12.0 ounces. To make sure the process is in control, a worker periodically selects at random a box containing 6 containers of coffee and measures their weight. When
Ten samples with 5 observations each have been taken from the Beautiful Shampoo Company plant in order to test for volume dispersion in the shampoo bottle filling process. The average sample range was found to be .3 ounces. Develop control limits for the sample range.
A production manager at Ultra Clean Dishwashing company is monitoring the quality of the company’s production process. There has been concern relative to the quality of the operation to accurately fill the 16 ounces of dishwashing liquid. The product is designed for a fill level of 16.00 +
A quality control inspector has taken 4 samples with 5 observations each at the Beautiful Shampoo Company, measuring - the volume of shampoo per bottle. If the average range for the 4 samples is .4 ounces and the average mean of the observations is 19.8 ounces, develop three sigma control limits
A quality control inspector at the Beautiful Shampoo Company has taken 3 samples with 4 observations each of the volume of shampoo bottles filled. The data collected by the inspector and the computed means are shown here: Samples of Shampoo Bottle Volume in Ounces Observation 1 2 3 ] 19.7 19.7
A quality control manager at a manufacturing facility has taken 4 samples with 4 observations each of the diameter of a part. (a) Compute the mean of each sample. (b) Compute an estimate of the mean and standard deviation of the sampling distribution. (c) Develop control limits for 3 standard
Describe the concept of Six Sigma quality. Why is such a high quality level important?
Describe the process of acceptance sampling. What types of sampling plans are there? What is acceptance sampling used for?
Explain what is meant by process capability. Why is it important? What does it tell us? How can it be measured?
Explain the use of p-charts and c-charts. When would you use one rather than the other? Give examples of measurements for both p-charts and c-charts.
Explain the differences between x-bar and R-charts. How can they be used together and why would it be important to use them together?
Describe a quality control chart and how it can be used. What are upper and lower control limits? What does it mean if an observation falls outside the control limits?
Discuss the key differences between common and assignable causes of variation. Give examples.
Describe three recent situations in which you were directly affected by poor product or service quality.
Explain the three categories of statistical quality control (SQC). How are they different, what different information do they provide, and how can they be used together?
Given your findings, what should Jose do?
Use one of the quality tools described in the chapter to an- alyze the defects in the case. How do the quality dimensions dif- fer between the two materials? Are there more defects associated with the super plastic versus the standard material?
Identify the different costs of quality described in the case. Explain the trade-offs that Delta made in their decision between the costs of quality. Was George Chadwick correct that conduct- ing more tests was unnecessary?
Deyelop a short questionnaire to be filled out by GCA’s customers that evaluates how customers define quality.
Offer suggestions to George Stein on ways of identifying quality dimensions GCA’s customers consider important.
What is wrong with how Gold Coast Advertising measures its quality? Explain why Gold Coast should ask its customers about how they define quality.
The following system of components has been proposed for a new product. Determine the reliability of the system. R=0.85 R=0.90 R=0.90 R=0.85 R=0.90 R=0.95
BioTech Research Center is working to develop a new vaccine for the West Nile Virus. The project is so important that the firm has created 3 teams of experts working on the project from different perspectives. Team 1 has a 90 percent chance of success, team 2 an 85 percent chance of success, and
A University Web server has 5 main components each with the same reliability. All 5 components must work for the server to function as intended. If the University wants to have a 95 percent reliability what must be the reliability of each of each of the components?
An LCD projector in an office has a main light bulb with a reliability of .90 and backup bulb, the reliability of which is .80.The system looks as follows:What is the reliability of the system? 0.80 0.90
What would be the reliability of the bank system above if each of the 3 components had a backup with a reliability of 0.80? How would the total reliability be different?
A bank loan processing system has 3 components with in- dividual reliabilities as shown:What is the reliability of the bank loan processing system? R=.90 R 89 R = .95
An engine system consists of 3 main components in a se- ries, all having the same reliability. Determine the level of relia- bility required for each of the components if the engine is to have a reliability of 0.998.
An office copier has 4 main components in a series with the following reliabilities: 0.89, 0.95, 0.90, and 0.90. Determine the reliability of the copier.
A jet engine has 10 components in series. The average reli- ability of each component is 0.998. What is the reliability of the engine?
A CD player has 5 components that all must function for the player to work. The average reliability of each component is 0.90. What is the reliability of the CD player?
Who are the seven "gurus" of quality? Name at least one contribution made by at least three of them.
What are ISO 9000 standards? Who were they set by and why? Can you describe other certifications based on the ISO 9000 certification?
What is the Malcolm Baldrige National Quality Award? Why is this award important, and what companies have received it in the past?
Describe the seven tools of quality control. Are some more important than others? Would you use these tools separately or to- gether? Give some examples of tools that could be used together.
Describe the use of quality function deployment (QFD). Can you find examples in which the voice of the customer was not translated properly into technical requirements?
Explain the meaning of the plan-do-act-study cycle. Why is it described as a cycle?
Think again about the four costs of quality. Describe how each would change if we hired more inspectors without chang- ing any other aspects of quality.
Describe each of the four costs of quality: prevention, ap- praisal, internal failure, and external failure. Next, describe how each type of cost would change (increase, decrease, or remain the same) if we designed a higher quality product that was eas- ier to manufacture.
Describe the four dimensions of quality. Which do you think is most important?
Find three local companies that you believe exhibit high quality. Next, find three national or international companies that are recognized for their quality achievements.
Explain how TQM is different from the traditional notions of quality. Also, explain the differences between traditional or- ganizations and those that have implemented TQM.
Describe the TQM philosophy and identify its major char- acteristics.
Define quality for the following products: a university, an exercise facility, spaghetti sauce, and toothpaste. Compare your definitions with those of others in your class.
What would you recommend be done differently?
How should customer demand data be communicated through the system?
In this distribution chain, what happened to customer de- mand data?
Given the amount of inventory in the system, why did backorders occur?
How well does the distribution system seem to work? Talk about it in terms of customer service, costs, effective use of in- ventory, and information flows.
Cal's Carpentry is considering outsourcing its accounts re- ceivable function. Currently Cal employs two full-time clerks and one part-time clerk to manage accounts receivables. Each full- time clerk has an annual salary of $36,000 plus fringe benefits: costing 30 percent of their salary. The
Henri of Henri's French Cuisine (HFC), a chain of 12 restaurants, is trying to decide if it makes sense to outsource the purchasing function. Currently Henri employs two buyers at an annual fixed cost of $85,000. Henri estimates that the variable cost of each purchase order placed is $15. Value-Buy
Fast Finish, Inc. (FFI) has made a technological break- through in snow board finish application. FFI will apply the fin- ish for $0.23 per unit in variable costs plus a fixed annual cost of $230,000. Use the cost and demand information given in Prob- lem 3 for Downhill Boards to evaluate this
Downhill Boards (DB), a producer of snow boards, is eval- uating a new process for applying the finish to its snow boards. Durable Finish Company (DFC) has offered to apply the finish for $170,000 in fixed costs and a unit variable cost of $0.65.Downhill Boards currently incurs a fixed annual cost
Gabriela Manufacturing was able to find a new supplier that would provide the item for $1.80 per unit with an annual fixed cost of $200,000. Should Gabriela Manufacturing insource or outsource the item?
Gabriela Manufacturing must decide whether to insource or outsource a new toxic-free miracle carpet cleaner that works with its Miracle Carpet Cleaning Machine. If it decides to in- source the product, the process would incur $300,000 of annual fixed costs and $1.50 per unit of variable costs. If
Describe the current trends in e-commerce and how they affect supply chain management.
Describe radio frequency identification (RFID) and how it could be used by an organization.
Describe the role of warehouses in a supply chain.
Describe the kinds of information that are necessary in a supply chain.
Explain the benefits of using a single supplier as opposed to multiple suppliers.
Explain the concept of partnering, including advantages and disadvantages.
Think of your last major purchase. What criteria did you use to select the supplier?
Describe the additional factors that affect global supply chains.
What should Dr. Barr have done differently to avoid the prob- lems she is currently experiencing? What should Dr. Barr do now?
Identify the high-contact and low-contact segments of the operation. How should each be managed?
How would you define the "service bundle" currently be- ing offered? How is this different from the initial purpose of the clinic?
Identify the operations management problems that Dr. Barr is having at the clinic.
What would you advise Elizabeth?
Elizabeth senses that the business would be different if she accepts the proposal, but does not know how and why. Explain how it would be different.
What type of operation does Biddy's Bakery currently have in place? What type of operation is needed to meet the proposal made by the team of business students? Explain the differences between these two operations.
What is wrong with the proposal made by the team of business students? Why?
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