Judy’s Cake Shop makes fresh cakes to customer orders. After receiving the order by Judy’s assistant, which takes 2 minutes, Judy then takes 8 minutes to mix the ingredients for the cake and loads a cake pan for baking. Then the cake is put into the oven for 30 minutes. The oven can hold three cakes at one time. When the cake is taken out of the oven, it is cooled for 1 hour. The assistant then takes 2 minutes to pack the cake for pickup and bills the customer, which takes 3 minutes. a. What is the capacity of the process, and what is the bottleneck? b. What is the throughput time for a typical cake? c. If on average five orders are taken per hour, how many cakes are there in the process (on average)?
> What criteria—limit to four—should Scott Nolan use to screen suppliers to be integrated into the early phases of the Deere skid-steer loader development process? Why?
> Describe the differences between Gantt charting, FCS, and the theory of constraints
> An urgent care clinic is staffed by two physicians who can each see four patients per hour. The clinic is open 6 p.m. until midnight, seven days per week. The clinic tracked the average number of patients arriving by hour for a month and observed the fol
> In what ways does corporate strategy affect capacity decisions?
> Management of the ABC Floral Shop believes that its sales are seasonal in nature with a monthly seasonal pattern and no trend. The demand data and seasonal ratios for the past three years are given as follows. a. Calculate a forecast for Year 3 using A0
> The Yummy Ice Cream Company uses the exponential smoothing method. Last week the forecast was 100,000 gallons of ice cream, and 90,000 gallons was actually sold. a. Using α = .1, prepare a forecast for next week. b. Calculate the forecast using α = .2 an
> Qualitative forecasts and causal forecasts are not particularly useful as inputs to inventory and scheduling decisions. Why is this statement true?
> Widgets are made in a two-shift operation. Management is wondering if there is any difference in the proportion of defectives produced by these two shifts. a. How would you use the p control chart to determine if there is a difference between the two sh
> Why are most processes not in statistical control when they are first sampled for control chart purposes?
> Suppose you manufacture 10,000 wooden pencils per day. What would be an appropriate quality planning and control system for this product? Consider such factors as product attributes, measures of quality, tests, and so forth.
> Suppose a work center has a setup plus run time of 30 minutes to make 50 parts. Also assume it takes 10 minutes to move a standard container of 50 parts to the next work center and the demand rate is one part per minute throughout the day. a. Schedule th
> Which location provides Polaris the greatest cost advantage? Calculate the NPV of the three locations using a 10% discount rate.
> Consider the following financial data from the past year for Midwest Outdoor Equipment Corporation. a. Compute the receivable turnover ratio. b. Compute the inventory turnover ratio. c. Compute the asset turnover ratio. Gross Income $25,240,000 Total
> Why is a stable master schedule desirable for a lean production system? What is the effect if it is not stable?
> The Swanky Hotel provides room service for its guests. The process for room service begins with a room service manager who takes orders by phone at an average of 2 minutes per order. The manager then sends the order to the kitchen, where it takes a cook
> Explain the differences between capacity, flow rate, and demand.
> Critique the customer contact model. What are its strengths and weaknesses?
> Compare the expensive restaurant, fast-food restaurant, and cafeteria in terms of process characteristics, such as capital, product type, labor, planning, and control systems.
> How can the modular design concept control production variety and at the same time allow product variety?
> How would you determine whether a company has an operations and supply chain strategy? What specific questions would you ask, and what information would you gather?
> How does the work of an operations manager differ from the work of a marketing manager or a finance manager? How are these functions similar?
> How does Lean Six Sigma in 3M differ from traditional TQM programs?
> What purpose does the Quality Academy serve and how should it operate?
> Develop a forecast to use as a basis for Sales and Operations Planning.
> How should the hotel handle service recovery and service guarantees? Suggest some options they could implement.
> What recommendations would you make for the business as a whole to overcome its weaknesses and threats and then capitalize on its strengths and opportunities?
> Why are facilities decisions often made by top management? What is the role in these decisions of operations, marketing, finance, accounting, engineering, and human resources?
> A company has a shipment to make from Dallas, Texas to Phoenix Arizona, a distance of 1065 miles. It plans to ship 8 pallets weighing 650 pounds each. Which is the best mode of transportation considering the following information?
> Compare the environmental impact of the five different modes of transportation.
> The Doright Door Company is considering outsourcing production of its door to Mexico. Use the weighted scoring method to evaluate the costs and risks of the offshore supplier, Perfect Door Company (Puertas Perfectos). The Mexican company has quoted a pri
> How is offshoring of services different from products?
> How can coordination be increased both internally within the firm and externally with customers and suppliers?
> Can the ABC principle be applied to manufacturing component inventories? Discuss.
> A producer of electronic parts wants to take account of both production rate and demand rate in deciding on its lot sizes. A particular $50 part can be produced at a rate of 1000 units per month, and the demand rate is 200 units per month. The firm uses
> The SureGrip Tire Company produces tires of various sizes and shapes. The demand for tires tends to follow a quarterly seasonal pattern with a trend. For a particular type of tire the company’s current estimates are as follows: A0 = 10,000, T0 = 1,000, R
> Compare and contrast the management of finished goods inventory in a manufacturing firm with that in a retail or wholesale firm.
> A plant start-up is based on the following network: a. Draw a network for this project. b. What is the project completion time? c. Identify the critical path. Immediate Activity Activity Predecessor Time A B 3 D A 3 E A 6 5 B, D 6
> Contrast and compare CPM and PERT as project scheduling techniques.
> In problem 3, assume there are two machines of type A, two of type B, and two of type C. a. Prepare a finite capacity schedule. b. Compare the FCS to the Gantt chart in problem 3.
> How is the scheduling of patients in a doctor’s clinic similar to and different from the scheduling of jobs in a factory?
> Assume a restaurant operates from 11 a.m. to 11 p.m. seven days per week. a. How much capacity does the restaurant have on a weekly basis and an annual basis in hours? b. If the restaurant can serve a maximum of 40 customers per hour, how much weekly cap
> The Handy-Dandy Department Store had forecast sales of $110,000 for the previous week. The actual sales were $130,000. a. What is the forecast for this week, using exponential smoothing and α = .1? 208 Part Four Capacity and Scheduling b. If sales this w
> Describe the uses of qualitative, time-series, and causal forecasts.
> A process for producing electronic circuits has achieved very high yield levels. An average of only 8 defective parts per million is currently produced. a. What are the upper and lower control limits for a sample size of 100? b. Re compute the upper and
> Workers should be given more control over the inspection of their own work. Discuss the pros and cons of this proposition
> Would you expect the exponential distribution to be a good approximation of service times for a. Buying an airline ticket at the airport? b. Riding a merry-go-round at a carnival? c. Checking out of a hotel? d. Completing a midterm exam in your OM class?
> Recall a bad service experience that you recently had. What led to the service failure? Consider such dimensions as tangibles, reliability, responsiveness, assurance, or empathy.
> Assume that a plant operates 2,000 hours per year and the demand rate for parts is 100,000 units per year. The circulation time for each kanban container is 24 hours. a. How many kanban containers are needed for a container size of 100 parts? b. What wou
> State the lean tenets in your own words.
> Provide a definition of a bottleneck. Why is it important to find the bottleneck?
> Describe the service-product bundle for each of the following services: a. Hospital b. Lawyer c. Trucking firm
> Several industries—including those that produce furniture, houses, sailboats, and fashion clothing—have never progressed down the diagonal of the product process matrix to become highly standardized and efficient. Why do you think this is so?
> Why has there been an increase in product variety in our economy?
> Define the following terms in your own words: operations mission, order winner, order qualifier, and distinctive competence.
> What are the key decisions made by sourcing and logistics managers?
> Why should a manager of a bank home office be evaluated differently than a manager of a bank branch?
> What are the advantages of pursuing LEED, Energy Star, and ISO 14000 certifications?
> Can you be sure that all the parts produced by in-control processes will meet the specification?
> How will Lean Six Sigma affect the innovative culture at 3M and is Lean Six Sigma enough?”
> What was the role of standardization in improving Quality?
> What option do you recommend and why?
> There are five dimensions to SERVQUAL: responsiveness, assurance, tangibles, empathy, and reliability. What dimensions of service quality do you think are important for the hotel? Feel free to define your own dimensions or use SERVQUAL. Then for each of
> What should Andrea Meline do to meet the inventory and service goals stated by management? Hint: If the turnover is too low from your first analysis and is not feasible using available parts, try another master schedule that is feasible with reduced prod
> Best Homes is also collecting sales projections from each of its regions for 2016? What role should these additional sales projections play, along with the forecast from question 2 in determining the final national forecast?
> A company is considering four modes of transportation for its shipments. It plans to ship 32 pallets weighing 500 pounds each from Salt Lake City, Utah to Reno, Nevada at a distance of 518 miles. What is the best way to make these shipments given the fol
> What has been the effect of deregulation of transportation prices in the United States?
> The manager of a small post office is concerned that the growing township is overloading the one-window service being offered. Sample data are collected on 100 individuals who arrive for service. Using the following random number sequence, simulate six
> The Jolly Company sells candy and issued an RFQ to purchase a line of chocolates that are made to their specifications. After inspecting the samples for quality, the following results were determined for the three suppliers. Quality ratings were determin
> Give some examples of core competencies that would not be outsourced.
> How do lead times and forecast errors affect supply chain performance?
> Product A consists of subassemblies B and C. Subassembly B requires two parts of D and one part of E. Subassembly C requires one part of D and one part of F. a. Draw a product structure tree (BOM) for this product. b. How many parts are needed to make 30
> With regard to inventory management, discuss the difference between a replenishment philosophy and a requirements philosophy.
> For problem 2 in the chapter, suppose the Grinell Machine Shop produces its tables at a rate of two per day (250 working days per year). a. What is the optimal lot size? b. Draw a graph of on hand inventory versus time. c. What is the maximum value of in
> The local Toyota dealer has to decide how many spare shock absorbers of a particular type to order for repairing Toyota automobiles. This shock absorber has a demand of four units per month and costs $25 each. The carrying charge is 30 percent per year,
> What is the difference between a requirements philosophy and a replenishment philosophy of inventory management? Why is this difference important?
> A construction project has the following network and activity times: a. Make a forward pass and a backward pass on the activity times. b. Find the slack for each activity. c. Prepare a Gantt chart for this project. d. Activity D will be delayed by one da
> Give three examples of projects not given in the text. Are these projects unique, or are they repeated in some way?
> You are planning the new layout for the local branch of the Sixth Ninth Bank. You are considering separate cashier windows for the three different classes of service. Each class of service would be separate, with its own cashiers and customers. Oddly eno
> Sequence the jobs shown below by using a Gantt chart. Assume that the move time between machines is one hour. Sequence the jobs in priority order 1, 2, 3, 4. a. What is the make span? b. How much machine idle time is there? c. When is each job delivere
> Why is it important to view a batch-process operation as a network of interconnected queues?
> A barbershop has the following demand for haircuts on Saturday, which is its busiest day of the week. Number of Haircuts Probability 20 ……………………………………0.1 25 ……………………………………0.3 30 …………………………………..0.4 35 …………………………………...0.1 40 …………………………………..0.1 a. What is
> A school district has forecast student enrollment for several years into the future and predicts excess capacity for 2000 students. The school board has said that the only alternative is to close a school. Evaluate.
> The ABC Floral Shop sold the following number of geraniums during the last two weeks: Develop a spreadsheet for the following. a. Calculate forecasts using a three- and five-period moving average. b. Graph these forecasts and the original data using Exce
> Qualitative forecasting methods should be used only as a last resort. Agree or disagree? Comment.
> For the following situations, comment on whether inspection by variables or by attributes might be more appropriate: a. Filling packaged food containers to the proper weight. b. Inspecting for defects in cloth. c. Inspecting appliances for surface imperf
> Product A has an MTBF of 30 hours and an MTTR of 5 hours. Product B has an MTBF of 40 hours and an MTTR of 2 hours. a. Which product has higher reliability? b. Which product has better maintainability? c. Which product has greater availability?
> For a particular operation, the setup time is 10 minutes and the run time is 50 minutes to produce a standard lot of 40 parts. It takes three additional hours to circulate a container of parts after production is completed. The demand rate is 20,000 part
> Why did the concepts, principles, and techniques of lean emerge and evolve in Japan, not in the Western countries?
> Palin’s Muffler Shop has one standard muffler that fits a large variety of cars. The shop wishes to establish a periodic review system to manage inventory of this standard muffler. Use the information in the following table to determine
> The Stylish Hair Salon has three stylists who provide services to women. After checking in with the receptionist, which takes an average of 1 minute, the customer’s hair is washed, dried, and styled, taking an average of 25 minutes. The payment takes 3 m
> Explain Little’s Law in your own words. How can it be used, and what are its limitations?
> How do the managerial tasks differ among the services described in question 2?
> The rate of productivity improvement in the service industries has been much lower than in manufacturing. Can this be attributed to process selection decisions? What problems would be involved in using more efficient processes in service industries?
> Describe the steps that might be required in writing and producing a play. Compare these steps to the three steps for NPD described in Section 3.2. Is there a correspondence?
> An operations manager was heard complaining, “The boss never listens to me—all the boss wants from me is to avoid making waves. I rarely get any capital to improve operations.” a. Does the business have an operations strategy? b. What should be done abou
> What is the difference between operations management and supply chain management?
> How should ShelterBox respond to the issues it faces to best satisfy its stakeholders?
> Evaluate the pros and cons of the stormwater project on both financial and non-financial factors and make a recommendation on what Richard Murphy should decide.
> What is the process capability for each operator-machine combination?
> At a border inspection station, vehicles arrive at the rate of 10 per hour in a Poisson distribution. For simplicity in this problem, assume there is only one lane and one inspector, who can inspect vehicles at the rate of 12 per hour in an exponentially
