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business
operations management 6th
Operations Management Sustainability And Supply Chain Management 13th Global Edition Jay Heizer, Barry Render, Chuck Munson - Solutions
Using the data in Solved Problem 10.1, prepare an activity chart like the one in the Solved Problem, but a second Gas Man also delivers 11 gallons. lop25
10.10 Draw an activity chart for washing the dishes in a double-sided sink. Two people participate, one washing, the other rinsing and drying. The rinser dries a batch of dishes from the drip rack as the washer fills the right sink with clean but unrinsed dishes. Then the rinser rinses the clean
If Charlene Brewster has times of 8.4, 8.6, 8.3, 8.5, 8.7, and 8.5 and a performance rating of 110%, what is the normal time for this operation? Is she faster or slower than normal? lop25
Refer to Problem 10.13.a) If the allowance factor is 15%, what is the standard time for this operation?b) If the allowance factor is 18% and the performance rating is now 90%, what is the standard time for this operation? lop25
Claudine Soosay recorded the following times assembling a watch. Determine (a) the average time, (b) the normal time, and (c) the standard time taken by her, using a performance rating of 95% and a personal allowance of 8%.Assembly Times Recorded OBSERVATION NO.TIME(MINUTES)OBSERVATION
A Northeast Airlines gate agent, Chip Gilliken, gives out seat assignments to ticketed passengers. He takes an average of 50 seconds per passenger and is rated 110% in performance.How long should a typical agent be expected to take to make seat assignments? lop25
Jell Lee Beans is famous for its boxed candies, which are sold primarily to businesses. One operator had the following observed times for gift wrapping in minutes: 2.2, 2.6, 2.3, 2.5, 2.4.The operator has a performance rating of 105% and an allowance factor of 10%. What is the standard time for
After training, Mary Fernandez, a computer technician, had an average observed time for memory-chip tests of 12 seconds. Mary’s performance rating is 100%. The firm has a personal fatigue and delay allowance of 15%.a) Find the normal time for this process.b) Find the standard time for this
Susan Cottenden clocked the observed time for welding a part onto truck doors at 5.3 minutes. The performance rating of the worker timed was estimated at 105%. Find the normal time for this operation.Note: According to the local union contract, each welder is allowed 3 minutes of personal time per
A pizza shop in Dubai wants to estimate the standard time for preparing its famous margarita pizza. The manager has performed a time study of the process and the following results have been observed.TASK ELEMENT OBSERVATIONS (SECONDS) PERFORMANCE 1 2 3 4 5 6 RATING (%)Flatten dough 32 30 22 31 45*
The results of a time study to perform a quality control test are shown in the following table. On the basis of these observations, determine the normal and standard time for the test, assuming a 23% allowance factor.TASK ELEMENT PERFORMANCE RATING (%)OBSERVATIONS (MINUTES)1 2 3 4 5 1 97 1.5 1.8
Peter Rourke, a loan processor at Wentworth Bank, has been timed performing four work elements, with the results shown in the following table. The allowances for tasks such as this are personal, 7%; fatigue, 10%; and delay, 3%.TASK ELEMENT PERFORMANCE RATING (%)OBSERVATIONS (MINUTES)1 2 3 4 5 1 110
A time study of a factory worker has revealed an average observed time of 3.20 minutes, with a standard deviation of 1.28 minutes. These figures were based on a sample of 45 observations. Is this sample adequate in size for the firm to be 99%confident that the standard time is within {5% of the
Based on a careful work study in the Hofstetter Corp., the results shown in the following table have been observed:ELEMENT OBSERVATIONS(MINUTES) PERFORMANCE 1 2 3 4 5 RATING (%)Prepare daily reports 35 40 33 42 39 120 Photocopy results 12 10 36a 15 13 110 Label and package reports 3 3 5 5 4 90
The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company’s policy is a 23% allowance for workers.a) Compute the standard time for the bag-packing task.b)
The process of replacing an old tire for customers at Tire Tech.company involves five work elements. The table below shows the results of a time study of the process performed by the manager on seven occasions.JOB ELEMENT OBSERVATIONS(MINUTES) PERFORMANCE 1 2 3 4 5 6 7 RATING (%)1. Decide on a
Bank manager Art Hill wants to determine the percentage of time that tellers are working and idle. He decides to use work sampling, and his initial estimate is that the tellers are idle 15% of the time.How many observations should Hill take to be 95.45% confident that the results will not be more
Supervisor Kenneth Peterson wants to determine the percentage of time a machine in his area is idle. He decides to use work sampling, and his initial estimate is that the machine is idle 20%of the time. How many observations should Peterson take to be 98%confident that the results will be less than
A random work sample of operators taken over a 160-hour work month at Tele-Marketing, Inc., has produced the following results. What is the percentage of time spent working?On phone with customer 858 Idle time 220 Personal time 85 lop25
Supervisor Tom Choi at Tempe Equipment Company is concerned that material is not arriving as promptly as needed at work cells. A new kanban system has been installed, but there seems to be some delay in getting the material moved to the work cells so that the job can begin promptly. Choi is
An assembly-line worker at Joseph Milner’s Fabrication Shop inserts Part A into Part B. A time study was conducted and produced the following results in seconds: 8.4, 8.6, 8.3, 8.5, 8.7, 8.5.What is the average cycle time?•10.40 The cycle time for performing a certain task has been clocked at
The data in the following table represent time-study observations for an assembly process at Nagesh Murthy’s Toy Factory. On the basis of these observations, find the normal time for each element and the standard time for the process. Assume a 10% allowance factor.ELEMENT PERFORMANCE RATING
Arunachalam Narayanan has been clocked performing three work elements in the office, with the results shown in the following table. The allowance for tasks such as this is 15%.OBSERVATIONS (SECONDS) PERFORMANCE ELEMENT 1 2 3 4 5 6 RATING (%)1 13 11 14 16 51* 15 100 2 3* 21 25 73* 26 23 110 3 3 3.3
Is one additional employee sufficient to perform the new job element and prepare the 400 sandwiches during the morning shift?The workers get one 50-minute paid break during the shift, which is not included in their fatigue allowance. lop25
How much labor cost does new job element add to the total cost of one croissant sandwich? lop25
Summarize Alaska Airlines’ human resources focus in your own words. lop25
Why is employee empowerment useful to companies such as Alaska Airlines? lop25
What tools discussed in the chapter might be employed to enhance the company’s training and performance efforts? Why? lop25
What has Hard Rock done to lower employee turnover to half the industry average? lop25
How does Hard Rock’s human resource department support the company’s overall strategy? lop25
How would Hard Rock’s value system work for automobile assembly line workers? (Hint: Consider Hackman and Oldham’s core job characteristics.) lop25
How might you adjust a traditional assembly line to address more “core job characteristics”? lop25
The work environment includes these factors:a) Lighting, noise, temperature, and air qualityb) Illumination, carpeting, and high ceilingsc) Enough space for meetings and videoconferencingd) Noise, humidity, and number of coworkerse) Job enlargement and space analysis lop25
Methods analysis focuses on:a) the design of the machines used to perform a task.b) how a task is accomplished.c) the raw materials that are consumed in performing a task.d) reducing the number of steps required to perform a task. lop25
The least preferred method of establishing labor standards is:a) time studies.b) work sampling.c) historical experience.d) predetermined time standards. lop25
The allowance factor in a time study:a) adjusts normal time for errors and rework.b) adjusts standard time for lunch breaks.c) adjusts normal time for personal needs, unavoidable delays, and fatigue.d) allows workers to rest every 20 minutes. lop25
To set the required sample size in a time study, you must know:a) the number of employees.b) the number of parts produced per day.c) the desired accuracy and confidence levels.d) management’s philosophy toward sampling. lop25
Which of the following is least likely to be part of an operational risk framework?a. Loss data collectionb. Risk and control self-assessmentc. Counterparty credit assessmentd. Scenario analysis
Which of the following is the best description of a robust operational risk framework?a. It collects all operational risk losses that occur within the firm.b. It provides effective tools to identify, assess, control, and mitigate operational risk.c. It produces a capital calculation of operational
Use a decision tree to determine the best number of suppliers to manage disaster risk 504
Explain and measure the bullwhip effect 506
Describe the factor-weighting approach to supplier evaluation 508
Evaluate cost-of-shipping alternatives 509
Allocate items to storage locations in a warehouse 510
What is the difference between “unique-event” risk and“super-event” risk? lop6
If the probability of a “super-event” increases, does the“unique-event” risk increase or decrease in importance?Why? lop6
If the probability of a “super-event” decreases, what happens to the likelihood of needing multiple suppliers? lop6
Describe some ramifications of the bullwhip effect. lop6
Describe how the bullwhip measure can be used to analyze supply chains. lop6
Describe some potential pitfalls in relying solely on the results of a factor-weighting analysis for supplier selection. lop6
Describe some disadvantages of using a slow shipping method. lop6
Besides warehouse layout decisions, what are some other applications where ranking items according to “bang/buck”might make sense? lop6
How would you go about attempting to come up with the probability of a “super-event” or the probability of a “uniqueevent?” What factors would you consider? lop6
Following the incident of a furnace fire in the semiconductor plant in Albuquerque, New Mexico, Wellington Company decided to change its single-sourcing strategy of major components to multi-sourcing. The top management of Wellington Company believes that the probability in any year of a
Referring to Problem S11.2, Wellington Company re-estimated the probability of a “super-event” to 0.2% due to some heavy safety investment carried out in the Albuquerque plant. In addition, they replaced their second and third suppliers, for quality reasons, with two others, whose annual
Johnson Chemicals is considering two options for its supplier portfolio. Option 1 uses two local suppliers. Each has a “unique-event” risk of 5%, and the probability of a “superevent” that would disable both at the same time is estimated to be 1.5%. Option 2 uses two suppliers located in
Kryoneri Perfume Company is considering two alternatives for the supply of vetiver oil (an essential oil used in high-end perfumes). Alternative 1 is to use two suppliers located in Haiti, where half of the world’s vetiver oil comes from. Each has a “unique-event” risk of 5% and the
Consider the supply chain illustrated here:Last year, the retailer’s weekly variance of demand was 200 units.The variance of orders was 500, 600, 750, and 1,350 units for the retailer, wholesaler, distributor, and manufacturer, respectively.(Note that the variance of orders equals the variance of
Over the past 5 weeks, demand for wine at Winston’s Winery has averaged 1,890 bottles, and the variance of demand has been 793,000 bottles. Winston has ordered an average of 1,900 bottles per week over that time period, with a variance of orders of 1,805,000 bottles.a) What is the bullwhip
A manufacturer produces a single product that is sold abroad to an industrial company through the following channel.VARIANCE OF DEMAND Manufacturer Agent Distributor Industrial company VARIANCE OF ORDERS 1100 1100 2000 2000 4000 4000 9000a) Calculate the bullwhip effect for each stage of the supply
Consider a three-firm supply chain consisting of a retailer, manufacturer, and supplier. The retailer’s demand over an 8-week period was 100 units each of the first 2 weeks, 200 units each of the second 2 weeks, 300 units each of the third 2 weeks, and 400 units each of the fourth 2 weeks. The
As purchasing agent for Eynan Enterprises in Richmond, Virginia, you ask your buyer to provide you with a ranking of“excellent,” “good,” “fair,” or “poor” for a variety of characteristics for two potential vendors. You suggest that the “Products” total be weighted 40% and the
Using the data in Problem S11.10, assume that both Donna, Inc. and Kay Corp. are able to move all their “poor” ratings to “fair.” How would you then rank the two firms? lop6
The supply chain manager for Keskin Industries, Sean Willems, has developed the data shown in Table S11.3 for two vendors. Based on the weights and rankings shown, which is the preferred vendor? lop6
Referring to Problem S11.12, Sean Willems, in addition to the two possible vendors evaluated in Table S11.3,has found a third possible vendor. He now wants to evaluate all three vendors using the weights in Table S11.3. He scores the third vendor, Fricker V-Tech, Ltd., as: Engineering Competence 5,
A company with a plant in Basel can be served by both rail and truck at a cost of €250 and €1,500 per load, respectively. The transit time for the train is 15 days while that for the truck is 5 days.a) If the daily cost of transit inventory is €100, which transportation mode is more
If you have a third option for the data in Problem S11.16 and it costs only $4,000 and also takes 20 days, what is your most economical plan? lop6
Nubia textile shop in Egypt imports one of its products from China. The transportation time is currently 40 days, the cost per unit is E£35, and the holding cost of the product is 30% annually. Because of the long shipping time, the manager is evaluating the possibility of supplying the product
Peter Bell of Bell Electronics maintains an extensive stock of computer components for the consumer market. He has hundreds of drawers/cabinets for the many small parts (mother boards, graphic cards, fans, etc.), and he wants to organize them so as to minimize his travel and maximize his time at
Amy Zeng, owner of Zeng’s Restaurant Distributions, supplies nonperishable goods to restaurants around the metro area. She stores all the goods in a storage area with a single dock and one aisle. The goods are divided into five categories according to the following table. The table indicates the
Typically, the bullwhip effect is most pronounced at which level of the supply chain?a) consumersb) suppliersc) wholesalersd) retailers lop6
A more expensive shipper tends to provide:a) faster shipments and lower holding costsb) faster shipments and higher holding costsc) slower shipments and lower holding costsd) slower shipments and higher holding costs lop6
Discuss important issues in office layout 404
Define the objectives of retail layout 406
Discuss modern warehouse management and terms such as ASRS, cross-docking, and random stocking 407
Identify when fixed-position layouts are appropriate 410
Explain how to achieve a good process-oriented facility layout 411
Define work cell and the requirements of a work cell 415
Define product-oriented layout 417
Explain how to balance production flow in a repetitive or product-oriented facility 418
What are the seven layout strategies presented in this chapter? lop52
What are the three factors that complicate a fixed-position layout? lop52
How is process layout applied to supermarkets layout? What are the advantages and disadvantages of this type of layout for customers? lop52
How would an analyst obtain data and determine the number of trips in:(a) a hospital?(b) a machine shop?(c) an auto-repair shop? lop52
What are the advantages and disadvantages of product layout? lop52
What are the four assumptions (or preconditions) of establishing layout for high-volume, low-variety products? lop52
What are the alternative forms of work cells discussed in this textbook? lop52
What are the advantages and disadvantages of work cells? lop52
What are the main requirements of work cells? lop52
What are the two major trends influencing office layout? lop52
What are the key factors that should be considered when designing a hospital layout? lop52
What layout innovations have you noticed recently in retail establishments? lop52
What are the variables that a manager can manipulate in a retail layout? lop52
Study the distribution of different sections and services across several floors in multistorey department stores. Explain the rationale behind the location of different departments or sections in such stores. lop52
How does automatic identification work in a warehousing system? lop52
What information is necessary for random stocking to work? lop52
Explain the concept of cross-docking. lop52
What is a heuristic? Name several that can be used in assemblyline balancing. lop52
Gordon Miller’s job shop has four work areas, A, B, C, and D. Distances in feet between centers of the work areas are:A B C D A — 4 9 7 B — — 6 8 C — — — 10 D — — — —Workpieces moved, in hundreds of workpieces per week, between pairs of work areas, are:A B C D A — 8 7 4 B
A manufacturing firm in Saudi Arabia has four work centers arranged in the following order:Plan A (Existing Layout).WC 1 WC 2 WC 3 WC 4 40 m The number of workpieces moved between the four work centers are shown in the table below. The cost to move 1 work piece for 1 meter is Saudi Riyal 1.Number
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