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Operations Management Sustainability And Supply Chain Management Global Edition 12th Edition Jay Heizer, Barry Render, Chuck Munson - Solutions
If a mother is scheduled for a Caesarean-section birth (i.e., the baby is removed from the womb surgically), how would this flowchart change?
As Diane’s new assistant, you need to flowchart this process.Explain how the process might be improved once you have completed the chart.
What is the role of scanners in the baggage process?
What metrics (quantifiable measures) are needed to track baggage?
How does the kiosk alter the check-in process?
What other processes can an airline examine? Why is each important?
Prepare a flowchart of the process a passenger’s bag follows from kiosk to destination carousel. (See Example 2 in Chapter 6 for a sample flowchart.) Include the exception process for the TSA opening of selected bags
How does Wheeled Coach manage the tasks to be performed at each work station?
Why is it more efficient for the work cells to prepare “modules” and deliver them to the assembly line than it would be to produce the component (e.g., interior upholstery) on the line?
What is an alternative process strategy to the assembly line that Wheeled Coach currently uses?
Why do you think major auto manufacturers do not build ambulances?
Prepare the case for an optimistic sales manager that you should move ahead with the FMS now.
Prepare a case by a conservative plant manager for maintaining the status quo until the returns are more obvious.
As a production manager for RMC, what do you recommend?Why?
Using Figure 7.6 in the discussion of value-stream mapping as a starting point, analyze an opportunity for improvement in a process with which you are familiar and develop an improved process.
Prepare a service blueprint for one of the activities in Problem 7.13.
Prepare a time-function map for one of the activities in Problem 7.13
Prepare a process chart for one of the activities in Problem 7.13.
Prepare a flowchart for one of the following:a) the registration process at a schoolb) the process at the local car washc) a shoe shined) some other process with the approval of the instructo
Stapleton Manufacturing intends to increase capacity through the addition of new equipment. Two vendors have presented proposals. The fixed cost for proposal A is $65,000, and for proposal B, $34,000. The variable cost for A is $10, and for B,$14. The revenue generated by each unit is $18.
Nagle Electric, Inc., of Lincoln, Nebraska, must replace a robotic Mig welder and is evaluating two alternatives.Machine A has a fixed cost for the first year of $75,000 and a variable cost of $16, with a capacity of 18,000 units per year.Machine B is slower, with a speed of one-half of A’s, but
California Gardens, Inc., prewashes, shreds, and distributes a variety of salad mixes in 2-pound bags. Doug Voss, Operations VP, is considering a new Hi-Speed shredder to replace the old machine, referred to in the shop as “Clunker.” Hi-Speed will have a fixed cost of $85,000 per month and a
Metters Cabinets, Inc., needs to choose a production method for its new office shelf, the Maxistand. To help accomplish this, the firm has gathered the following production cost data:
Matthew Bailey, as manager of Designs by Bailey, is upgrading his CAD software. The high-performance (HP)software rents for $3,000 per month per workstation. The standard-performance (SP) software rents for $2,000 per month per workstation. The productivity figures that he has available suggest
Tim Urban, owner/manager of Urban’s Motor Court in Key West, is considering outsourcing the daily room cleanup for his motel to Duffy’s Maid Service. Tim rents an average of 50 rooms for each of 365 nights (365 3 50 equals the total rooms rented for the year). Tim’s cost to clean a room is
Ski Boards, Inc., wants to enter the market quickly with a new finish on its ski boards. It has three choices: (a)Refurbish the old equipment at a cost of $800, (b) make major modifications at a cost of $1,100, or (c) purchase new equipment at a net cost of $1,800. If the firm chooses to refurbish
Stan Fawcett’s company is considering producing a gear assembly that it now purchases from Salt Lake Supply, Inc.Salt Lake Supply charges $4 per unit, with a minimum order of 3,000 units. Stan estimates that it will cost $15,000 to set up the process and then $1.82 per unit for labor and
Refer to Problem 7.1. If a contract for the second and third years is pending, what are the implications for process selection?
Using the data in Problem 7.1, determine the best process for each of the following volumes: (1) 75,000, (2) 275,000, and (3) 375,000?
Using the data in Problem 7.1, determine the most economical volume for each process.
Borges Machine Shop, Inc., has a 1-year contract for the production of 200,000 gear housings for a new off-road vehicle. Owner Luis Borges hopes the contract will be extended and the volume increased next year. Borges has developed costs for three alternatives. They are general-purpose
Discuss the advantages and disadvantages of 3D printing.
What is additive manufacturing?
In what ways do CAD and FMS connect?
Explain what a flexible manufacturing system (FMS) is.
Name some of the advances being made in technology that enhance production and productivity.
Describe briefly what an automatic identification system(AIS) is and how service organizations could use AIS to increase productivity and at the same time increase the variety of services offered.
What are numerically controlled machines?
Identify the competitive advantage of each of the four firms identified in Discussion Question 11.
Identify service firms that compete on each of the four processes shown in Figure 7.1.
Identify the competitive advantage of each of the four firms identified in Discussion Question 9.
Identify manufacturing firms that compete on each of the four processes shown in Figure 7.1.
What do we mean by a process-control system, and what are the typical elements in such systems?
What is CIM?
Name the four quadrants of the service process matrix.Discuss how the matrix is used to classify services into categories.
What are the techniques for improving service productivity?
What is process redesign?
What is service blueprinting?
What type of process is used for making each of the following products?(a) beer(b) wedding invitations(c) automobiles(d) paper(e) Big Macs(f ) custom homes(g) motorcycles
What is process strategy?
The _______ risk is the probability that a lot will be rejected despite the quality level exceeding or meeting the _______.
The ability of a process to meet design specifications is called:a) Taguchi.b) process capability.c) capability index.d) acceptance sampling.e) average outgoing quality.
Control charts for attributes are:a) p -charts.b) c -charts.c) R -charts.d) x -charts.e) both a and b.
If parts in a sample are measured and the mean of the sample measurement is outside the control limits:a) the process is out of control, and the cause should be established.b) the process is in control but not capable of producing within the established control limits.c) the process is within the
The type of chart used to control the central tendency of variables with continuous dimensions is:a) x -chart.b) R -chart.c) p -chart.d) c -chart.e) none of the above.
The central limit theorem:a) is the theoretical foundation of the c -chart.b) states that the average of assignable variations is zero.c) allows managers to use the normal distribution as the basis for building some control charts.d) states that the average range can be used as a proxy for the
If the mean of a particular sample is within control limits and the range of that sample is not within control limits:a) the process is in control, with only assignable causes of variation.b) the process is not producing within the established control limits.c) the process is producing within the
The SPC chart on page 253 illustrates Darden’s use of control charts to monitor the weight of salmon filets. Given these data, what conclusion do you, as a Darden quality control inspector, draw? What report do you issue to your supervisor? How do you respond to the salmon vendor?
Darden applies SPC in many product attributes. Identify where these are probably used.
Select two potential problems—one in the Darden supply chain and one in a restaurant—that can be analyzed with a fish-bone chart. Draw a complete chart to deal with each problem.
How does Darden build quality into the supply chain?
Why is quality a critical function at Frito-Lay?
What are the advantages and disadvantages of Frito-Lay drivers stocking their customers’ shelves?
Angela is now going to evaluate a new salt process delivery system and wants to know if the upper and lower control limits at 3 standard deviations for the new system will meet the upper and lower control specifications noted earlier.The data (in percents) from the initial trial samples are:Sample
Cecil Rice Export is planning on providing incentives for senior personnel to rotate into other shifts to better mix personnel among the shifts. If the same control charts were used for all three shifts, what would be the control limits of these charts?
Develop a control chart for each shift. Does there appear to be a difference between the shifts?
What control charts should be used to determine whether the process is in control or out of control?
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.Furthermore, P a at 1.5% defective levels is 0.95. At 5%
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 4%, which is the historical average for this
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 1,000 in a lot. The number of defects in the
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 deviation of the amounts was 0.034 ounce. Determine the
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 deviation of 1 ounce. Determine the Cpk of the
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 process is known to operate at a mean thickness of
Linda Boardman, Inc., an equipment manufacturer in Boston, has submitted a sample cutoff valve to improve your manufacturing process. Your process engineering department has conducted experiments and found that the valve has a mean ( m )=8.00 and a standard deviation ( s ) of .04. Your desired
Meena Chavan Corp.’s computer chip production process yields DRAM chips with an average life of 1,800 hours and s = 100 hours. The tolerance upper and lower specification limits are 2,400 hours and 1,600 hours, respectively. Is this process capable of producing DRAM chips to specification?
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.
One of New England Air’s top competitive priorities is on-time arrivals. Quality VP Clair Bond decided to personally monitor New England Air’s performance. Each week for the past 30 weeks, Bond checked a random sample of 100 flight arrivals for on-time performance. The table that follows
West Battery Corp. has recently been receiving complaints from retailers that its 9-volt batteries are not lasting as long as other name brands. James West, head of the TQM program at West’s Austin plant, believes there is no problem because his batteries have had an average life of 50 hours,
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 their receiving docks. The department has decided
Telephone inquiries of 100 IRS “customers” are monitored daily at random. Incidents of incorrect information or other nonconformities (such as impoliteness to customers)are recorded. The data for last week follow:a) Construct a 3-standard deviation c -chart of nonconformities.b) What does the
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:
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 complaint rate is unknown.c) Is the process in control,
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 nine 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 upper and lower control limits for the control
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 healthful. A questionnaire accompanies each meal served, asking the patient,
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 3s upper and lower control limits.b) Why can the lower control
Refer to Problem S6.16. If the defective rate was 3.5%instead of 1.5%, what would be the control limits ( z = 3 )?
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 next three days are 12, 5, and 13, is the
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 lower control chart limits for various values
The defect rate for data entry of insurance claims 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 size used were 50, with 3s ?c) What if the sample size used were 100, with 2s ?d)
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 eight Eagletrons at a time. For each sample, they determine the
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 were computed. The results were:a) Determine the upper and lower
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, s, is 1.36.a) What is sx ?b) If z = 3, what are the control limits for the mean chart?c) What are the control limits
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 = 6.56. LCLx = 5.84, UCLR = 1.141, LCLR =
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 average weight, in pounds, of nine of the bowling balls produced
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 diameter have been as follows:a) What is the value of x ?b) What is
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 process. Plot the information and look for patterns.
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