There is concern about the speed of automobiles traveling over a particular stretch of highway. For a random sample of 28 automobiles, radar indicated the following speeds, in miles per hour:59636857567159695358606651595464585766616570636557566159a. Check for evidence of no norma...
09 Aug 2020A clinic offers a weight-loss program. A review of its records found the following amounts of weight loss, in pounds, for a random sample of 24 of its clients at the conclusion of a 4-month program:182516111520161928252631454036192825361635201619a. Find a 99% confidence interval ...
09 Aug 2020Twenty people in one large metropolitan area were asked to record the time (in minutes) that it takes them to drive to work. These times were as follows:3042354045223215414528324527475030254625a. Calculate the standard error.b. Find for a 95% confidence interval for the true pop...
09 Aug 2020The following data represent the number of passengers per flight in a random sample of 20 flights from Vienna, Austria, to Cluj-Napoca, Romania, with a new airline:6365943783957096472952384779662548805249a. What is the reliability factor for a 90% confidence interval estimate of ...
09 Aug 2020An auditor, examining a total of 820 accounts receivable of a corporation, took a random sample of 60 of them. The sample mean was $127.43, and the sample standard deviation was $43.27.a. Using an unbiased estimation procedure, find an estimate of the population mean.b. Using an ...
09 Aug 2020The data in the table below represent time study observations for a woodworking operation.a. Based on the observations, determine the standard time for the operation, assuming an allow- ance of 15 percent of job time.b. How many observations would be needed to estimate the m...
09 Aug 2020Given these observed times (in minutes) for five elements of a job, determine the observed time (OT) for each element. Note: Some of the elements occur only periodically.CYCLEElement12345612.12.02.22.12.121.11.01.233.43.53.33.53.43.344.04.251.41.41.51.51.51.4
09 Aug 2020An analyst has timed a metal-cutting operation for 50 cycles. The average time per cycle was 10.40 minutes, and the standard deviation was 1.20 minutes for a worker with a performance rating of 125 percent. Assume an allowance of 16 percent of job time. Find the standard time for...
09 Aug 2020What are motion study principles? How are they classified?8. Name some reasons why methods analyses are needed. How is methods analysis linked to produc- tivity improvements?9. How are devices such as flow process charts and worker-machine charts useful?10. What is a ...
09 Aug 2020Ten labs will be assigned to the circular layout shown. Recalling a similar layout’s congestion in the halls, the new lab manager has requested an assignment that will minimize traffic between offices. In addition, movement in the halls is restricted to a counterclockwise route. ...
09 Aug 2020Eight work centers must be arranged in an L-shaped building. The locations of centers 1 and 3 are assigned as shown in the accompanying diagram. Assuming transportation costs are $1 per load per meter, develop a suitable layout that minimizes transportation costs using the given ...
09 Aug 2020A. Determine the placement of departments for a newly designed facility that will minimize total transportation costs using the data in the following tables. Assume that reverse distances are the same. The locations are shown in the grid. Use a cost of $1 per trip yard.Location A...
09 Aug 2020Arrange six departments into a 2 X 3 grid so that these conditions are satisfied: 1 close to 2, 5 close to 2 and 6, 2 close to 5, and 3 not close to 1 or 2.10. Using the information given in the preceding problem, develop a Muther-type grid using the letters A, O, and...
09 Aug 2020A shop works a 400-minute day. The manager of the shop wants an output of 200 units per day for the assembly line that has the elemental tasks shown in the table. Do the following:a. Construct the precedence diagram.b. Assign tasks according to the most following tasks rule...
09 Aug 2020As part of a major plant renovation project, the industrial engineering department has been asked to balance a revised assembly operation to achieve an output of 240 units per eight-hour day. Task times and precedence relationships are as follows:TaskDuration (minutes)Immediate P...
09 Aug 2020A manager wants to assign tasks to workstations as efficiently as possible, and achieve an hourly out- put of 4 units. The department uses a working time of 56 minutes per hour. Assign the tasks shown in the accompanying precedence diagram (times are in minutes) to workstations u...
09 Aug 2020A manager wants to assign tasks to workstations as efficiently as possible, and achieve an hourly output of 331⁄3 units. Assume the shop works a 60-minute hour. Assign the tasks shown in the accom- panying precedence diagram (times are in minutes) to workstations using the follow...
09 Aug 2020According to a study by the Alliance of American Insurers, it costs more than three times the origi- nal purchase price in parts and labor to reconstruct a wrecked Chevrolet. Explain the reasons for this large discrepancy in terms of the processes used to assemble the original ca...
09 Aug 2020The City Transportation Planning Committee must decide whether to begin a long-term project to build a subway system or to upgrade the present bus service. Suppose you are an expert in fixed-path and variable-path material-handling equipment, and the committee seeks your couns...
09 Aug 2020Briefly describe the two main layout types.10. What are the main advantages of a product layout? The main disadvantages?11. What are the main advantages of a process layout? The main disadvantages?12. What is the goal of line balancing? What happens if a line is unbalance...
09 Aug 2020The director of social services of a county has learned that the state has mandated additional infor- mation requirements. This will place an additional burden on the agency. The director has identi- fied three acceptable alternatives to handle the increased workload. One alterna...
09 Aug 2020A logistics provider plans to have a new warehouse built to handle increasing demands for its services. Although the company is unsure of how much demand there will be, it must decide now on the size (large or small) of the warehouse. Preliminary estimates are that if a small war...
09 Aug 2020Determine the course of action that has the highest EMV for the accompanying tree diagram.1/306090404460(45)45994050304050
09 Aug 2020Construct a graph that can be used for sensitivity analysis for the preceding problem.a. How sensitive is the solution to the problem in terms of the probability estimate of .35?b. Suppose that, after consulting with a member of the town planning board, management decides t...
09 Aug 2020Refer to Problem 6. Suppose that the management of Theme Park, Inc., has decided that there is a.35 probability that the motel’s application will be approved.a. If management uses maximum expected monetary value as the decision criterion, which alterna- tive should it choose?...
09 Aug 2020The following diagram describes a process that consists of eight separate operations, with sequen- tial relationships and capacities (units per hour) as shown.a. What is the current capacity of the entire process?b. If you could increase the capacity of only two operations th...
09 Aug 2020The manager of a car wash must decide whether to have one or two wash lines. One line will mean a fixed cost of $6,000 a month, and two lines will mean a fixed cost of $10,500 a month. Each line would be able to process 15 cars an hour. Variable costs will be $3 per car, and reve...
09 Aug 2020A manager must decide how many machines of a certain type to purchase. Each machine can pro- cess 100 customers per day. One machine will result in a fixed cost of $2,000 per day, while two machines will result in a fixed cost of $3,800 per day. Variable costs will be $20 per cus...
09 Aug 2020A manager is trying to decide whether to purchase a certain part or to have it produced internally. Internal production could use either of two processes. One would entail a variable cost of $17 per unit and an annual fixed cost of $200,000; the other would entail a variable cost...
09 Aug 2020A small firm intends to increase the capacity of a bottleneck operation by adding a new machine. Two alternatives, A and B, have been identified, and the associated costs and revenues have been estimated. Annual fixed costs would be $40,000 for A and $30,000 for B; variable costs...
09 Aug 2020What are some capacity measures for each of the following?a. Universityb. Hospitalc. Computer repair shopd. Farm17. What is the benefit to a business organization of having capacity measures?1. What are the major trade-offs in capacity planning?2. Who needs...
09 Aug 2020How can a systems approach to capacity planning be useful?10. How do capacity decisions influence productivity?11. Why is it important to match process capabilities with product requirements?12. Briefly discuss how uncertainty affects capacity decisions.13...
09 Aug 2020A manager must decide between two machines. The manager will take into account each machine’s operating costs and initial costs, and its breakdown and repair times. Machine A has a projected average operating time of 142 hours and a projected average repair time of 7 hours. Proje...
09 Aug 2020A machine can operate for an average of 10 weeks before it needs to be overhauled, a process which takes two days. The machine is operated five days a week. Compute the availability of this machine. (Hint: All times must be in the same units.)
09 Aug 2020A manufacturer of programmable calculators is attempting to determine a reasonable free-service period for a model it will introduce shortly. The manager of product testing has indicated that the calculators have an expected life of 30 months. Assume product life can be described...
09 Aug 2020An electronic chess game has a useful life that is exponential with a mean of 30 months. Determine each of the following:a. The probability that any given unit will operate for at least (1) 39 months, (2) 48 months,(2) 60 months.b. The probability that any given ...
09 Aug 2020Refer to the previous problem.a. Assume that the single switch used in plan 1 is 98 percent reliable, while reliabilities of the machines remain the same. Recalculate the reliability of plan 1. Compare the reliability of this plan with the reliability of plan 1 calculated in s...
09 Aug 2020Refer to the previous problem.a. Assume that the single switch used in plan 1 is 98 percent reliable, while reliabilities of the machines remain the same. Recalculate the reliability of plan 1. Compare the reliability of this plan with the reliability of plan 1 calculated in s...
09 Aug 2020A production line has three machines A, B, and C, with reliabilities of .99, .96, and .93, respec- tively. The machines are arranged so that if one breaks down, the others must shut down. Engineers are weighing two alternative designs for increasing the line’s reliability. Plan 1...
09 Aug 2020A product engineer has developed the following equation for the cost of a system component: C = (10P)2, where C is the cost in dollars and P is the probability that the component will operate as expected. The system is composed of two identical components, both of which must oper...
09 Aug 2020A product is composed of four parts. In order for the product to function properly in a given situation, each of the parts must function. Two of the parts have a .96 probability of functioning, and two have a probability of .99. What is the overall probability that the product wi...
09 Aug 2020Refer to Figure 4.4. What two technical requirements have the highest impact on the customer requirement that the paper not tear?b. The following table presents technical requirements and customer requirements for the output of a laser printer. First, decide if any of the technic...
09 Aug 2020List the steps involved in getting gasoline into your car for full service and for self-service. Assume that paying cash is the only means of payment. For each list, identify the potential trouble points and indicate a likely problem.6. Construct a list of steps for mak...
09 Aug 2020Give two examples of unethical conduct involving product or service design and the ethical prin- ciples (see Chapter 1) that are violated.1. Examine and compare one of the following product sets. Base your comparison on such factors as features, costs, convenience, eas...
09 Aug 2020Give two examples of unethical conduct involving product or service design and the ethical prin- ciples (see Chapter 1) that are violated.1. Examine and compare one of the following product sets. Base your comparison on such factors as features, costs, convenience, eas...
09 Aug 2020Describe some of the trade-offs that are encountered in product and service design.2. Who needs to be involved in the design of products and services?3. How has technology had an impact on product and service design?1. A number of fast-food chains, after their success wi...
09 Aug 2020What is meant by the term life cycle? Why would this be a consideration in product or service design?9. Why is R&D a key factor in productivity improvement? Name some ways R&D contributes to pro- ductivity improvements.10. What is mass customization?11. Name two factors ...
09 Aug 2020A manager uses this equation to predict demand for landscaping services: Ft = 10 5t. Over the past eight periods, demand has been as follows:Period, t:12345678Demand:1521233032384247Is the forecast performing adequately? Explain.
09 Aug 2020A manager has just received an evaluation from an analyst on two potential forecasting alternatives. The analyst is indifferent between the two alternatives, saying that they should be equally effective.Period:12345678910Data:37393739454947495154Alt. 1:36384042464646485255Alt. 2:...
09 Aug 2020A textbook publishing company has compiled data on total annual sales of its business texts for the preceding nine years:Year:123456789Sales (000):40.244.548.052.355.857.162.469.073.7a. Using an appropriate model, forecast textbook sales for each of the next five years.b. Pre...
09 Aug 2020
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