Question: Thirty-five samples of size 7 each

> You are considering opening a copy service in the student union. You estimate your fixed cost at $15,000 and the variable cost of each copy sold at $.01. You expect the selling price to average $.05. a) What is the break-even point in dollars? b) What is

> Given the following data, calculate a) BEPx; b) BEP$; and c) the profit at 100,000 units: P = $8/unit V = $4/unit F = $50,000

> Janelle Heinke, the owner of Ha’Peppas! is considering a new oven in which to bake the firm’s signature dish, vegetarian pizza. Oven type A can handle 20 pizzas an hour. The fixed costs associated with oven A are $20,000 and the variable costs are $2.00

> For the past month, which has an effective capacity of 6,500, has made only 4,500 hammers per day because of material delay, employee absences, and other problems. What is its efficiency?

> Given the data in Problem S7.17, at what volume (units) of output would the two alternatives yield the same profit? Data from Problem S7.17: Sroufe Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment.

> Using the data in Problem S7.17: a) What is the break-even point in dollars for proposal A if you add $10,000 installation to the fixed cost? b) What is the break-even point in dollars for proposal B if you add $10,000 installation to the fixed cost? Da

> Sroufe Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals. The fixed costs for proposal A are $50,000, and for proposal B, $70,000. The variable cost for A is $12.

> Smithson Cutting is opening a new line of scissors for supermarket distribution. It estimates its fixed cost to be $500.00 and its variable cost to be $0.50 per unit. Selling price is expected to average $0.75 per unit. a) What is Smithson’s break-even p

> A production process at Kenneth Day Manufacturing. The drilling operation occurs separately from, and simultaneously with, sawing and sanding, which are independent and sequential operations. A product needs to go through only one of the three assembly o

> Klassen Toy Company, Inc., assembles two parts (parts 1 and 2): Part 1 is first processed at workstation A for 15 minutes per unit and then processed at workstation B for 10 minutes per unit. Part 2 is simultaneously processed at workstation C for 20 min

> Explain why doubling the capacity of a bottleneck may not double the system capacity.

> The Pullman Mfg., Inc., three-station work cell has two machines at station 1 in parallel. The manager, Ms. Hartley, has asked you to evaluate the system if she adds a parallel machine at station 2. a) What is the throughput time of the new work cell? b)

> The three-station work cell at Pullman Mfg., Inc. It has two machines at station 1 in parallel (i.e., the product needs to go through only one of the two machines before proceeding to station 2). a) What is the throughput time of this work cell? b) What

> The three-station work cell has a product that must go through one of the two machines at station 1 (they are parallel) before proceeding to station 2. a) What is the bottleneck time of the system? b) What is the bottleneck station of this work cell? c)

> A work cell at Chris Ellis Commercial Laundry has a workstation with two machines, and each unit produced at the station needs to be processed by both of the machines. (The same unit cannot be worked on by both machines simultaneously.) Each machine has

> Amy Xia’s plant was designed to produce 7,000 hammers per day but is limited to making 6,000 hammers per day because of the time needed to change equipment between styles of hammers. What is the utilization?

> Organic Grains LLC uses statistical process control to ensure that its health-conscious, low-fat, multigrain sandwich loaves have the proper weight. Based on a previously stable and in-control process, the control limits of the x- and R-charts are UCLx =

> A. Choudhury’s bowling ball factory in Illinois makes bowling balls of adult size and weight only. The standard deviation in the weight of a bowling ball produced at the factory is known to be 0.12 pounds. Each day for 24 days, the aver

> Auto pistons at Wemming Chung’s plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of this diamet

> Sampling four pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results: Develop appropriate control charts and determine whether there is any cause for concern in the cutting proce

> We want to determine the AOQ for an acceptance sampling plan when the quality of the incoming lots in percent defective is 1.5%, and then again when the incoming percent defective is 5%. The sample size is 80 units for a lot size of 550 units. Furthermor

> IBM asked SMT and one other, much larger company to bid on 80 more units of a particular computer product. The request for quote (RFQ) asked that the overall bid be broken down to show the hourly rate, the parts and materials component in the price, and

> Hard Rock brings the concept of the “experience economy” to its cafe operation. The strategy incorporates a unique “experience” into its operations. This innovation is somewhat akin to mass customization in manufacturing. At Hard Rock, the experience con

> In an acceptance sampling plan developed for lots containing 1,000 units, the sample size n is 85. The percent defective of the incoming lots is 2%, and the probability of acceptance is 0.64. What is the average outgoing quality?

> The percent defective from an incoming lot is 3%. An OC curve showed the probability of acceptance to be 0.55. Given a lot size of 2,000 and a sample of 100, determine the average outgoing quality in percent defective.

> An acceptance sampling plan has lots of 500 pieces and a sample size of 60. The number of defects in the sample may not exceed 2. This plan, based on an OC curve, has a probability of .57 of accepting lots when the incoming lots have a defective rate of

> As the supervisor in charge of shipping and receiving, you need to determine the average outgoing quality in a plant where the known incoming lots from your assembly line have an average defective rate of 3%. Your plan is to sample 80 units of every 1,00

> The upper and lower design specification limits for a medical procedure performed by Dr. Muge Yayla Kallu are 15 minutes and 13 minutes, respectively. The process x = 14.5 minutes and  = .2 minutes. Compute the Cp and interpret its meaning.

> Ross Hopkins is attempting to monitor a filling process that has an overall average of 705 mL. The average range is 6 mL. If you use a sample size of 10, what are the upper and lower control limits for the mean and range?

> Product specifications call for a part at Vaidy Jayaraman’s Metalworks to have a length of 1.000" +- .040". Currently, the process is performing at a grand average of 1.000" with a standard deviation of 0.010". Calculate the capability index of this proc

> Two machines are currently in use in a process at the Dennis Kira Mfg. Co. The standards for this process are LSL = .400" and USL = .403". Machine One is currently producing with mean = .401" and standard deviation .0004". Machine Two is currently produc

> A new process has just been established on Jianli Hu’s assembly line. The process is supposed to place 4 grams of a deep red coloring in each bottle of nail polish with an Upper Specification Limit of 4.1 grams and a Lower Specification Limit of 3.9 gram

> A process filling small bottles with baby formula has a target of 3 ounces +- 0.150 ounce. Two hundred bottles from the process were sampled. The results showed the average amount of formula placed in the bottles to be 3.042 ounces. The standard deviatio

> Custom Vans, Inc., specializes in converting standard vans into campers. Depending on the amount of work and customizing to be done, the customizing can cost from less than $1,000 to more than $5,000. In less than 4 years, Tony Rizzo was able to expand h

> Frank Pianki, the manager of an organic yogurt processing plant, desires a quality specification with a mean of 16 ounces, an upper specification limit of 16.5, and a lower specification limit of 15.5. The process has a mean of 16 ounces and a standard d

> The specifications for a plastic liner for concrete highway projects calls for a thickness of 3.0 mm +- .1 mm. The standard deviation of the process is estimated to be .02 mm. What are the upper and lower specification limits for this product? The proces

> Linda Boardman, Inc., an equipment manufacturer in Boston, has submitted a sample cut-off valve to improve your manufacturing process. Your process engineering department has conducted experiments and found that the valve has a mean () of 8.00 and a sta

> Meena Chavan Corp.’s computer chip production process yields DRAM chips with an average life of 1,800 hours and  = 100 hours. The tolerance upper and lower specification limits are 2,400 hours and 1,600 hours, respectively. Is this process capable of pr

> The difference between the upper specification and the lower specification for a process is 0.6". The standard deviation is 0.1". What is the process capability ratio, Cp? Interpret this number.

> Rosters Chicken advertises “lite” chicken with 30% fewer calories than standard chicken. When the process for “lite” chicken breast production is in control, the average chicken breast contains 420 calories, and the standard deviation in caloric content

> In order to monitor the allocation of patrol cars and other police resources, the local police chief, Timothy Kraft, collects data on the incidence of crime by city sector. The city is divided into ten sectors of 1000 residents each. The number of crime

> Daily samples of 100 power drills are removed from the assembly line at Drills by Stergios Fotopoulos and inspected for defects. Over the past 21 days, the following information has been gathered. Develop a 3 standard deviation (99.73% confidence) p-char

> The smallest defect in a computer chip will render the entire chip worthless. Therefore, tight quality control measures must be established to monitor these chips. In the past, the percent defective at Chieh Lee’s Computer Chips has been 1.1%. The sample

> Micro laboratories have decided to develop a quality control program. The semiconductor parts that it gets from suppliers are either good or defective. The total number of semiconductors in every sample is 200. Determine the upper control chart limit and

> François Caron is considering developing an app for a week-long music festival in southern France, which will have 18 stages on a 2 km2 land and around 200 performers. It generally attracts more than 150,000 visitors. The app will include sc

> A part at Belleh Fontem Manufacturing requires holes of size .5 +- 0.01 inches. The drill bit has a stated size of .5 +- 0.005 inches and wears at the rate of .00017 inches per hole drilled. Give the most and least number of holes that can be drilled wit

> Your supervisor, Lisa Lehmann, has asked that you report on the output of a machine on the factory floor. This machine is supposed to be producing optical lenses with a mean weight of 50 grams and a range of 3.5 grams. The following table contains the da

> A process at Amit Eynan Bottling Company that is considered in control measures liquid in ounces. Below are the last 12 samples taken. The sample size = 4. a) What are the control limits for the mean chart? b) What are the control limits for the range ch

> Auto pitch devices are made for both major- and minor-league teams to help them improve their batting averages. When set at the standard position, Auto pitch can throw hardballs toward a batter at an average speed of 60 mph. To monitor these devices and

> The overall average of a process you are attempting to monitor at Feryal Erhun Enterprises is 50 units. The average range is 4 units. The sample size you are using is n = 5. a) What are the upper and lower control limits of the 3-sigma mean chart? b) Wha

> The overall average of a process you are attempting to monitor at Gihan Edirisinghe Motors is 75 units. The process standard deviation is 1.95, and the sample size is n = 10. What would be the upper and lower control limits for a 3-sigma control chart?

> The accounts receivable department at Rick Wing Manufacturing has been having difficulty getting customers to pay the full amount of their bills. Many customers complain that the bills are not correct and do not reflect the materials that arrived at thei

> Telephone inquiries of 100 IRS “customers” are monitored daily at random by Xiangling Hu. Incidents of incorrect information or other nonconformities (such as impoliteness to customers) are recorded. The data for last

> The school board is trying to evaluate a new math program introduced to second-graders in five elementary schools across the county this year. A sample of the student scores on standardized math tests in each elementary school yielded the following data:

> Frito-Lay, the multi-billion-dollar subsidiary of food and beverage giant PepsiCo, maintains 36 plants in the U.S. and Canada. These facilities produce dozens of snacks, including the well-known Lay’s, Fritos, Cheetos, Doritos, Ruffles, and Tostitos bran

> An ad agency tracks the complaints, by week received, about the billboards in its city: a) What type of control chart would you use to monitor this process? Why? b) What are the 3-sigma control limits for this process? Assume that the historical complain

> Peter Ittig’s department store, Ittig Brothers, is Amherst’s largest independent clothier. The store receives an average of six returns per day. Using z = 3, would 9 returns in a day warrant action?

> Jamison Kovach Supply Company manufactures paper clips and other office products. Although inexpensive, paper clips have provided the firm with a high margin of profitability. Sample size is 200. Results are given for the last 10 samples: a) Establish up

> The overall average on a process you are attempting to monitor is 50 units. The process population standard deviation is 1.72. Determine the upper and lower control limits for a mean chart, if you choose to use a sample size of 5. a) Set z = 3. b) Now se

> Houston North Hospital is trying to improve its image by providing a positive experience for its patients and their relatives. Part of the “image” program involves providing tasty, inviting patient meals that are also

> Five data entry operators work at the data processing department of the Birmingham Bank. Each day for 30 days, the number of defective records in a sample of 250 records typed by these operators has been noted, as follows: a) Establish 3ï&sup3

> Refer to Problem S6.16. If the defective rate was 3.5% instead of 1.5%, what would be the control limits (z = 3)? Data from Problem S6.16: In the past, the defective rate for your product has been 1.5%. What are the upper and lower control chart limits

> In the past, the defective rate for your product has been 1.5%. What are the upper and lower control chart limits if you wish to use a sample size of 500 and z = 3?

> The results of an inspection of DNA samples taken over the past 10 days are given below. Sample size is 100. a) Construct a 3-sigma p-chart using this information. b) Using the control chart in part (a), and finding that the number of defectives on the n

> You are attempting to develop a quality monitoring system for some parts purchased from Charles Sox Manufacturing Co. These parts are either good or defective. You have decided to take a sample of 100 units. Develop a table of the appropriate upper and l

> Orlando’s Arnold Palmer Hospital, founded in 1989, specializes in treatment of women and children and is renowned for its high-quality rankings (top 10% of 2,000 benchmarked hospitals), its labour and delivery volume (more than 14,000 births per year), a

> The defect rate for data entry of insurance claims at Sadegh Kazemi Insurance Co. has historically been about 1.5%. a) What are the upper and lower control chart limits if you wish to use a sample size of 100 and 3-sigma limits? b) What if the sample siz

> Eagletrons are all-electric automobiles produced by Mogul Motors, Inc. One of the concerns of Mogul Motors is that the Eagletrons be capable of achieving appropriate maximum speeds. To monitor this, Mogul executives take samples of 8 Eagletrons at a time

> Twelve samples, each containing five parts, were taken from a process that produces steel rods at Emmanuel Kodzi’s factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges wer

> A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n = 5) taken. The population process standard deviation, , is 1.36. a) What is x? b) If z = 3,

> Boxes of Honey-Nut Oatmeal are produced to contain 14 ounces, with a standard deviation of .1 ounces. Set up the 3-sigma x-chart for a sample size of 36 boxes.

> The Head of Department of your college is concerned about the poor outcomes. He has recorded data presented in the table below for 10 students. He first investigated the students’ attendance rate and their grade to understand if there i

> Develop a histogram of the transportation time you took the last ten times you travelled to college.

> Identify and explain six quality inspections in a service with which you have had some experience.

> Choose criteria for a checklist to identify the quality problems (possible defect issues) for manufacturing shirts and blouses.

> Draw a fish-bone chart showing why an assistant you paid to prepare a spreadsheet produced one with numerous errors.

> Alaska Airlines operates in a land of rugged beauty, crystal clear lakes, spectacular glaciers, majestic mountains, and bright blue skies. But equally awesome is its operating performance. Alaska Airlines consistently provides the industry’s number-one o

> Prepare a fish-bone chart explaining how a pizza delivery can arrive late on a Friday or Saturday.

> New World Theatre tracks customer satisfaction in their cinema. In a recent survey, they asked for feedback from the customers where each customer had the opportunity to mention one thing they were displeased with. The outcome was that 797 customers answ

> Your team has been hired by a wallets producer company called Middle Eastern Fine Leather Company (MEFL). MEFL makes wallets and supplies them through several retail outlets in the Middle Eastern region. Recently some problems have emerged: â€

> Your operations management professor is a dedicated professor. He is a perfectionist, and passionate about his job. He joined your university in the fall of 2016, and has since then taught more than 500 students. A committed pedagogue, your professor exp

> Develop an Ishikawa diagram to depict customer dissatisfaction at a pizza restaurant. You should use the four Ms approach.

> Mercedes is assessing which of two windshield suppliers provides a better environmental design for disassembly. Using the tables below, select between PG Glass and Glass Unlimited.

> In Problem S5.7, another alternative (Alternative Four) is investigated, where the city takes total responsibility for the program and employs a number of local people with a variable cost of €1,000 per month. Further, in the spirit of social responsibil

> In a municipality where a significant amount of recyclable waste is generated, the city has granted permits to waste collectors to take charge of the recyclables and generate additional income by selling them. Now the city wants to establish an environme

> Repeat Problem S5.4 but now with an average fuel price of $3.8 per mile. Data from Problem S5.4: A small commercial company wants to buy cars for its sales personnel. After extensive market research, the company is about to decide which one of the follo

> In Problem S5.4, fuel efficiency was determined based on using the cars in city traffic. Estimate the total life cycle cost of each alternative and the crossover point in both miles and years if the cars are used for motorway travelling where the average

> Whether it’s scheduling nurses at Mayo Clinic, pilots at Southwest Airlines, classrooms at UCLA, or servers at a Hard Rock Cafe, it’s clear that good scheduling is important. Proper schedules use an organization’s assets (1) more effectively, by serving

> A small commercial company wants to buy cars for its sales personnel. After extensive market research, the company is about to decide which one of the following two cars to choose from based on the information provided in the following table. Compare the

> Using the information in Problem S5.1, which design alternative is the better environmental choice if the Brew House decided to remove the timer from the Brew Master model? Data from Problem S5.1: The Brew House needs to decide which of two coffee maker

> The table below compares the accuracy of two forecasting methods used by company XYZ to forecast its monthly sales of one of its product. The data pertain to the forecast and actual sales levels over a period of 5 months. What is the value of the trackin

> Using the information in Problem S5.1, which design alternative is the better environmental choice if the Brew House decided to add a timer to the Brew Mini model? The timer revenue and costs are identical to those of the Brew Master. Data from Problem

> Given the following data, use least-squares regression to develop a relation between the number of rainy summer days and the number of games lost by the Boca Raton Cardinal baseball team.

> The accountant at Bintong Chen Coal Distributors, Inc., in Newark, Delaware, notes that the demand for coal seems to be tied to an index of weather severity developed by the U.S. Weather Bureau. When weather was extremely cold in the U.S. over the past 5

> A study to determine the correlation between bank deposits and consumer price indices in Birmingham, Alabama, revealed the following (which was based on n = 5 years of data): a) What is the equation of the least-squares regression line? b) Find the coeff

> The following multiple regression model was developed to predict job performance as measured by a company job performance evaluation index based on a pre-employment test score and college grade point average (GPA): a) Forecast the job performance index f

> Using the new crossover point in Problem S5.18, how many years does it take to reach that point? Data from Problem S5.18: Using the data from Problem S5.16, if gas prices rose to $3.00 per gallon, what would be the new crossover point in miles? Data fr

> Using the date in Problem 4.47, the company wants to find out how closely sales are related to the money spent on advertisements. a) Calculate the coefficient of correlation for the data given in Problem 4.47 and comment on the degree of the linear relat

> The massive 875,000-square-foot Amway Centre in Orlando, Florida, is a state-of-the-art sports entertainment centre. While it is the home of the Orlando Magic basketball team, it is a flexible? venue designed to accommodate a vast array of entertainment.

> Using the data from Problem S5.16, if gas prices rose to $3.00 per gallon, what would be the new crossover point in miles? Data from Problem S5.16: Given the data in Problem S5.15 and an alternative hybrid vehicle with the specifications shown below: a)