Newtonian, Inc. is working on a design for a new smartphone. Marketing staff conducted extensive surveys and focus groups with potential customers to determine the characteristics that the customers want and expect in a smartphone. Newtonian’s studies have identified the most important customer expectations as Initial cost Reliability Ease of use Features Operating cost Compactness Develop a set of technical requirements to incorporate into the design of a House of Quality relationship matrix to assess how well your requirements address these expectations. Refine your design as necessary, based upon the initial assessment.
> Constant Hope Hospital wants to set up x and s control charts for the time required to perform a critical step in gall bladder surgery. Twenty-five samples of size 4 can be found in the C08 Problem Data workbook. Find the control limits using the appropr
> Drives has a statistically in-control manufacturing process that is normally distributed. Sample means and ranges for 15 samples of size 5 can be found in the C08 Problem Data workbook. Determine process capability indexes by estimating the standard devi
> For each of the control charts in Figure 8.56, assume that the process has been operating in statistical control for some time. What conclusions should the operators reach at this point?
> The initial data provided in the Excel workbook C08 Problem Data represent processing time values for 20 samples of size 4 that were taken from Rapid Check Kiters, Inc., a check processing firm, over a 20-hour period. a. Use the X-bar&R Excel template t
> Nighthawk Airlines measured their numbers of lost bags in one month and found that they had lost 35 bags for 10,000 customers. If the average number of bags per customer is 1.2, how many errors per million opportunities (tempo) does this represent? The w
> Use the data for Birdseye Magnetrons (Problem 24) and the X-bar&R Excel template to determine if the process appears to be in statistical control. Data from problem 24: Birdseye Magnetrons makes induction meters used in vending machines to test the vali
> Hermitage DNA Labs, LLC collected temperature readings in an analysis process. The data can be found in the C08 Problem Data workbook. a. Compute the mean and range of each sample and calculate control limits for x and R charts using the appropriate for
> J. McWilliams Swim Club is trying to calibrate its chlorine pump to ensure that the right amount of chlorine (1.0–1.5 ppm of free chlorine) is mixed into the water. Thirty samples of four readings at random times during the week were taken. These data ca
> Black Elk Medical Center (BEMC) is a qualitydriven acute care hospital organization that includes three medical facilities that treat both inpatients and outpatients. BEMC has won numerous national and local quality awards. These included the J.D. Power
> After some further analysis, River Bottom Fire Department (Problem 22) relocated one of their fire stations. After doing so, they wanted to evaluate response times to determine whether or not the response process was in control. Thirty new samples were t
> Twenty-five samples of size 4 resulted in statistics of x 5 38.0 minutes and R 5 3.0 minutes for the Turk master Cleaning Company’s average time to completely clean a rug. Compute control limits for x- and R-charts and estimate the standard deviation of
> Birdseye Magnetrons makes induction meters used in vending machines to test the validity of coins. Their specifications require the induction reading capability of the meters to fall between 0.25 and 0.50 Tesla (T) units. Quality analysts took 3 random t
> Palma State Bank is investigating the processing time for loan applications. Samples were taken for 25 random days from 5 branches. These data can be found in the C08 Problem Data workbook. a. Compute the mean and standard deviation, and construct a hist
> River Bottom Fire Department is evaluating their response times in order to determine whether a new fire station is needed. Samples were taken for 30 consecutive days from 6 stations. These data can be found in the C08 Problem Data workbook. a. Compute
> Suppose that a refrigeration process at Cold foods, Ltd. Has a normally distributed output with a mean of 27.0 and a variance of 1.21. a. If the specifications are 27.0 6 3.25, compute b. Suppose the mean shifts to 26.0 but the variance remains unchange
> Samples for three parts made at River City Parts Co. were taken and provided in the C08 Problem Data workbook. a. Calculate the mean and standard deviation for each part and compare the natural variation of each part to the following specification limit
> Well place Insurance Company processes insurance policy applications in batches of 50. One day, they had 10 batches to process and, after inspection, it was found that 4 batches had nonconforming policies. One batch had 3 nonconformances, another had 5,
> From the data for Saami Theatrical Products that can be found in the C08 Problem Data workbook, use the Process Capability Excel template to find a histogram and compute the process capability indexes. If the specifications are 22 6 0.03, estimate the pe
> A machining process at the Mach4 Tool Co. has a required dimension on a part of 0.575 6 0.007 inch. Dimensions of 25 parts were measured and are available in the C08 Problem Data workbook. a. Compute the process capability indexes using formulas (8.25) t
> This case is based on an application of QFD at Tennessee Technological University to their Research Resources Center (RRC), an internal service system. Originally created as a support facility for faculty and student research, the RRC has grown to offer
> Use formulas (8.26) and (8.27) to show mathematically that when the process mean is centered
> A gauge repeatability and reproducibility study was made at Accurate Parts, Inc., using three operators, taking three trials each on identical parts. The data can be found in the C08 Problem Data workbook. The part specification for the collar that was m
> A gauge repeatability and reproducibility study at Frankford Brake Systems collected the data found in the worksheet Prob. 8-15 in the Excel file C08Data.xlsx on the Student Companion Site for this chapter. Analyze these data. The part specification is 1
> A gauge repeatability and reproducibility study at New Gauge, Inc., collected data for three operators, two trials, and eight parts, available in the C08 Problem Data worksheet. The part specification is 1.5 6 0.1 inches. Use formulas (8.6) through (8.24
> Two scales at Aussieburgers, Ltd. were used to weigh the same 25 samples of hamburger patties for a fast food restaurant in Australia. Results are shown in the C08 Problem Data workbook. The samples were weighed in grams, and the supplier has ensured tha
> A genetic researcher at Gelb, Ltd. is trying to test two laboratory thermometers (that can be read to 1/100,000th of a degree Celsius) for accuracy and precision. She measured 25 samples with each and obtained the results found in the C08 Problem Data wo
> Analyze the quality losses at Beech ware Software Corp. using the data in the Excel workbook C08 Problem Data. What conclusions do you reach?
> Stateside Metrology Repairs, Inc. has a thriving business repairing and upgrading high-technology measuring instruments. The costs of quality that they have collected over the past year can be found in the Excel workbook C08 Problem Data. Analyze their q
> Leatherlike Manufacturing Company makes an artificial leather-like product for the fashion accessory market. The material is made in sheets and has the appearance of a thin rug. Each sheet is 36 inches wide and 100 feet long and is wound into a roll. The
> A team was formed to study the auto part at Adams Metal Fabricating described in Problem 8. While continuing to work to find the root cause of scrap, the team found a way to reduce the cost for scrapping the part to $45 per part. a. Determine the Taguch
> In a true story related by our colleague Professor James W. Dean, Jr., the general manager of an elevator company was frustrated with the lack of cooperation between the mechanical engineers who designed new elevators and the manufacturing engineers who
> A specification for the length of an auto part at Adams Metal Fabricating is 15.0 6 1.75 centimeters (cm). It costs $65 to scrap a part. Determine the Taguchi loss function. Then, determine the expected loss if the process mean is found to be 15.03 cm wi
> A team was formed to study the refrigerator part at Cool Food, Inc. described in Problem 6. While continuing to work to find the root cause of scrap, they found a way to reduce the scrap cost to $35 per part. a. Determine the Taguchi loss function for t
> A blueprint specification for the thickness of a refrigerator part at Cool Food, Inc. is 0.06 6 0.04 centimeters (cm). It costs $45 to scrap a part that is outside the specifications. Determine the Taguchi loss function for this situation.
> Georgia’s Giant Gyros (Problem 4) acquired some additional information about product characteristics. It found that consumers placed the highest importance on taste appeal (especially flavor), followed by healthiness (measured by sodium content and calor
> Georgia’s Giant Gyros conducted consumer surveys and focus groups concerning a new gyro sandwich design and the restaurant facility, and identified the most important customer expectations (not in any order of priority) as: Tasty, attractive, moderately
> National Partamiento installs and maintains thousands of refrigerators and other appliances in rental apartments across the country. They have conducted a short study of failure rates based on following the performance of 25,440 refrigerators that were i
> Newtonian, Inc. (Problem 2) faces three major competitors in this market: Oldphonia, Symphonic, and Collie onia. It found that potential consumers placed the highest importance on reliability (measured by such things as freedom from operating system cras
> Mega art, a large department store, has a very successful and profitable package-wrapping department. The department uses two complex bow-making machines that work inline to make the bows for the packages. Bow-making Machine 1 has a reliability of 0.97.
> An automated production system at Autopsy’s Inc. consists of three operations: turning, milling, and grinding. Individual parts are transferred from one operation to the next by a robot. Hence, if one machine or the robot fails, the process stops. A prod
> Maniple, Inc. has a complex manufacturing process, with three operations that are performed in series. Because of the nature of the process, machines frequently fall out of adjustment and must be repaired. To keep the system going, two identical machines
> Many one-tenth scale remote control (RC) model car racing enthusiasts believe that spending more money on high-quality batteries, using expensive gold-plated connectors, and storing batteries at low temperatures will improve battery life performance in a
> Getronics has a three-step process for processing customer sales. First, the cashier must look up the customer’s loyalty card on the company’s information system. Second, the cashier enters the transaction on the point-of-sale register. Third, the cashie
> An electronic missile guidance system at Guide, Inc. consists of Components A, B, C, and D, which have reliabilities of 0.98, 0.97, 0.91, and 0.95, respectively (see the following diagram). a. What is the reliability of the entire system? b. Suppose th
> A manufacturer of electric cooktops purchases major electronic components as modules. The reliabilities of components differ by supplier (see the system diagram below). Suppose that the configuration of the major components is given by: The components c
> The MTBF of an integrated circuit made by Way forward, Inc. is 16,000 hours. Calculate the failure rate.
> An electronic component in a satellite radio made by Space scope, Inc. has a failure rate of λ = 0.0000165 units/hour. Find the mean time to failure (MTTF). What is the probability (assuming an exponential probability distribution) that the component wil
> Livelong, Inc.’s computer monitors have a failure rate of λ = 0.00095 units per hour. Assuming an exponential distribution, what is the reliability function? What is the probability of failure within 2,000 hours? Calculate your answer using the appropria
> Broadened, Inc. makes automobile tires that have a mean life of 50,000 miles with a standard deviation of 2,500 miles. Using Excel functions (see Chapter 6), determine the following: a. What fraction of tires is expected to survive beyond 54,000 miles?
> The life of a calorific phone battery is normally distributed with a mean of 1,100 days and standard deviation of 60 days. Using Excel functions (see Chapter 6), determine the following: a. What fraction of batteries is expected to survive beyond 1,200
> Massive Corporation’s tested five motors in a 900- hour test. Compute the failure rate if three failed after 200, 475, and 750 hours and the other two ran for the full 900 hours each.
> The Breton Card Company (BCC) is a manufacturer of playing cards and novelty cards for consumers and entertainment businesses. Playing cards are produced to individual specifications, which include the customer rolls of paper together, printing the ink p
> The average time to handle a call in the Call-No wait call processing center has a specification of 5.9 6 1.15 minutes. The loss due to a mishandled call is $15. A sample of 25 calls was drawn from the process and the results, in minutes, can be found in
> Two processes, P and Q, are used by a supplier to produce the same component, Z, which is a critical part in the engine of the Bearing Port 778 airplane. The specification for Z calls for a dimension of 0.24 mm 6 0.03. The probabilities of achieving the
> At Elproparts Manufacturers’ integrated circuit business, managers gathered data from a customer focus group and found that any output voltage that exceeds 60 6 3.5 volts was unacceptable to the customer. Exceeding these limits results in an estimated lo
> A computer chip designed by the MicroKeeb Co. has a specification for the distance between two adjacent pins of 2.000 6 0.002 mm. The loss due to a defective chip is $4. A sample of 25 chips was drawn from the production process and the results, in milli
> A computer chip designed by the MicroKeeb Co. has a specification for the distance between two adjacent pins of 2.000 6 0.002 mm. The loss due to a defective chip is $4. A sample of 25 chips was drawn from the production process and the results, in milli
> An automatic cookie machine at ACM, Inc. must deposit a specified amount of 25 6 0.3 grams (g) of dough for each cookie on a conveyor belt. It costs $0.03 to scrap a defective cookie. A sample of 50 cookies was drawn from the production process, which ha
> An electronic component at Amp comp has a specification of 100 6 0.4 ohms. Scrapping the component results in a $81 loss. a. What is the value of k in the Taguchi loss function? b. If the process at Amp comp averages 99.8 ohms with a standard deviation
> Guido Unlimited makes electronic soundboards for car stereos. Output voltage to a certain component on the board must be 12 6 0.5 volts. Exceeding the limits results in an estimated loss of $60. Determine the Taguchi loss function.
> A hospital developed a design process consisting of the following steps: Plan, Design, Measure, Assess, and Improve. Below is a list of specific activities that comprise these five steps in random order. Place the activities in the most appropriate order
> The dimension of a machined part made by Perfection Machining, Inc. has a nominal specification of 7.6 cm. The process that produces the part can be controlled to have a mean value equal to this specification, but has a standard deviation of 0.3 cm. What
> Nearly everyone has eaten at McDonald’s; the company sells millions of French fries each day. However, variation in the fries hasn’t gone unnoticed. One Japanese news source challenged McDonald’s Japanese weight standard with an experiment. Weighing 6500
> The mean time to pour and process 5 cubic yards of concrete by the Ohio Valley Construction is 15.5 minutes. If 2 percent of the projects with 5 yards of concrete require more than 15.75 minutes, what is the standard deviation of the time for such projec
> Sparkly Cleaning Co. has found that standard size offices have a standard deviation of 5 minutes for their cleaning time. The operations manager knows that 95 percent of the offices require more than 120 person-minutes to clean. However, she wishes to fi
> Frackly Oil is sold in 900 milliliter (mL) cans. The mean volume of oil placed in a can is 880 ml with a standard deviation of 7.8 mile Assuming a normal distribution of the data, what is the probability that the filling machine will cause an overflow in
> El Grande Green Tea is sold in 350 milliliter cans. The standard deviation for the filling process is 9 milliliters. What must the target mean for the process be to ensure that the probability of overfilling more than 350 mL in a can is at most 1 percent
> Rainbow Punch was made by Frutayuda, Inc. and sold in 12-ounce cans to benefit victims of Hurricane Zero. The mean number of ounces placed in a can by an automatic fill pump is 11.7 with a standard deviation of 0.18 ounce. Assuming a normal distribution,
> The Turk alike Rug Company buys medium grade carpet in 100-foot rolls. The average number of defects per roll is 2.0. Assuming that these data follow a Poisson distribution, use the Poisson spreadsheet template to answer the following questions. a. What
> Auditors at the Valles Verdes Partners, P.S.C. took a sample of 150 accounts payable bills, as shown in the table found in the Excel worksheet Prob. 6-2 in the Excel workbook C06 Problem Data. a. Find the proportion of the accounts payable in the sample
> A quality manager at Nevis Pharmaceutical Company is monitoring a process that fills vials with a liquid medication designed to prevent glaucoma in the eyes of the user. The company wants to ensure that each vial contains at least 60 mL (2.03 fluid oz.)
> Tessler Electric utility requires service operators to answer telephone calls from customers in an average time of 0.1 minute or less. A sample of 25 actual operator times was drawn, and the results are given in the following table. In addition, operator
> A new product is being tested by Zed Electronics to determine if it will continue to operate in a stable fashion under a variety of conditions. A sample of 400 items were tested, and 60 failed the test. Determine a 90 percent confidence interval for the
> Burrito Brothers is a small regional chain of quick service restaurants in the Midwest. They specialize in four types of burritos: chicken, beef, pork, and a bean-based vegetarian item. The burritos are made-to-order, so customers can add rice, cheese, g
> Chelsey, a young entrepreneur who has worked in various restaurants throughout high school and college, has decided to develop a new food service concept that focuses primarily on takeout of home-cooked meals for busy professionals on their way home from
> The distribution center manager at Internet distributor Plastik Parts, Inc. wants to find a confidence interval for the average time required for an associate to fill an order for shipment. A sample of 25 orders is taken and the mean time was found to be
> A warehouse manager at Dock housing, Inc. maintains a large inventory of video games. The company’s database states that the mean value of the games in inventory is $50, with a standard deviation of $5. The manager is concerned about pilfering the more e
> The data in the Excel worksheet Prob. 6-13 in C06 Problem Data workbook shows the weight of a set of castings (in kilograms) being made in the Fillmore Metal-work foundry. Construct an Excel spread sheet to compute the mean and standard deviation using f
> The times for carrying out a blood test at Rivercreek Labs for 100 tests, found in the Prob. 6-12, in the C06 Problem Data workbook, were studied in order to better understand the process. Apply the Descriptive Statistics tool to compute summary statisti
> Use the data for Twenty-first Century Laundry for the weights of loads of clothes processed through their washing department in a week. (See Prob. 6-11 in the C06 Problem Data workbook.) a. Apply the Excel Descriptive Statistics tool to compute the mean,
> Genjeteye, Inc. makes aircraft engines. The mean time to failure has been found to be 100,000 hours and is exponentially distributed. a. What is the failure rate, l, per hour? b. What is the cumulative probability of failure after 10,000 hours or fewer
> A new production process at Fabulist, Inc. has two in-line stages. The probability of defective components being produced in stage 1 is 15 percent and 10 percent in stage 2. Assembled units that have defective components only from stage 1 OR only from st
> The process engineer at Siva Electronics is also trying to determine whether a newer, more costly design involving a gold alloy in a computer chip is more effective than the present, less expensive silicon design. She wants to obtain an effective output
> A quality analyst at Paint fast Manufacturing Co. wants to determine if a new paint formulation, used to paint parts for a customer’s assembly operation, will dry fast enough to meet the customer’s needs. The customer would prefer to obtain a high level
> At White Clay Pottery a kiln is used to bake ceramic pottery. The production manager wishes to determine the relationship between temperature and brittleness, so he takes measurements of the brittleness of test items versus the temperature of the oven. (
> Managing an integrated supply chain (ISC) is highly dependent on quality management practices. IBM, which considers the effective and efficient operation of its supply chain as a key factor in improving its competitiveness, has approached implementation
> The process engineer at Siva Electronics was trying to determine whether three suppliers would be equally capable of supplying the mounting boards for the new “gold plated” components that she was testing. The table found in the worksheet Prob. 6-23 in t
> Softshell, a software developer, is trying to determine if any of three potential subcontractors has better programmers in order to outsource a development project. The three subcontractors agreed to test 5 programmers, using a standardized test provided
> Rabbit foot Community Bank makes a large number of home equity loans each year. The vice president of loan administration wishes to determine if their time for paperwork processing is lower than the average time of their top competitor. Data for a sample
> The quality manager at Olivet Pharmaceutical Company is certifying a new process that must produce 95 percent (or better) good product before certification can be completed. A sample of 30 containers from the process line are tested, and 92 percent are f
> Global food supply chains consist of many processes. Bananas, for example, are grown on farms in South or Central America. At the farm, the growth and quality are monitored continuously, and samples are tested periodically. Once the bananas in a cluster
> The process for depositing a check at Better Banking, Inc. begins with the teller determining if the customer wants to receive any cash back. If not, the teller checks to see if the payee’s name is on the account, stamps the deposit slip, and gives the c
> You have most likely taken your car for service at an automobile dealership. Typical activities in servicing a customer’s automobile include making an appointment, meeting with a service advisor to discuss the service or problem, waiting for the work to
> Maintaining accuracy of books on the shelves in a college library is an important task. Consider the following problems that are often observed: Books are not placed in the correct shelf position, which includes those books that have been checked out an
> The process for filling a prescription at a pharmacy begins when a customer’s physician calls the pharmacy or the customer drops off a written prescription. Sometimes the customer needs to refill a prescription and if no refills remain, the pharmacist wi
> The process of making a batch of paint at Peter’s Paint Products (PPP) paint factory consists of the following steps: First the correct amount of raw materials must be mixed in the proper sequence. The operator must follow specified safety instructions.
> Gold Star Chili is a chain of chili restaurants in the greater Cincinnati area. Figure 5.8 shows a process based organization of the company. Three major value creation processes link the operation of the company to its customers and other stakeholders:
> Consider the following list of generic business processes. Identify each as a value-creation process or a support process. Then discuss the logical sequence that the value creation processes should follow. a. Invoice customers b. Manage information c.
> Easy Quality Solutions (EQS) is trying to design a handheld device targeted toward quality managers. They have surveyed a panel of quality managers and have found that the characteristics that are important to such managers are: speed, active memory, por
> Audrey’s Beauty Boutique started out with a mission of providing hair care, beauty treatment, and spa services to middle-income women. Angelina would like to move to a more upscale clientele, if possible. She has collected weekly data for the past two ye
