List six ways that simulation can be used in business.
> Solve the following LP problem graphically. Indicate the corner points on your graph.
> Solve the following LP problem graphically:
> Mamlouk Design is an Egyptian manufacturer of handmade silk rugs. The company manufactures rugs in two different sizes: 1.5 * 2.5 meters and 2 * 3 meters. The manufacturing process depends mainly on the labor required, where each 1.5 * 2.5 meter rug requ
> Construct a house of quality matrix for a wristwatch. Be sure to indicate specific customer wants that you think the general public desires. Then complete the matrix to show how an operations manager might identify specific attributes that can be measure
> Solve the following LP problem graphically:
> The Outdoor Furniture Corporation manufactures two products, benches and picnic tables, for use in yards and parks. The firm has two main resources: its carpenters (labor force) and a supply of redwood for use in furniture. During the next production cyc
> Solve the following linear programming problem graphically:
> Walter Wallace is trying to determine how many units each of two commercial multiline telephones to produce each day. One of these is the standard model; the other one is the deluxe model. The profit per unit on the standard model is $40, on the deluxe m
> An online retailer wants to optimize its marketing portfolio budget to maximize its return on investment (ROI). The retailer has decided to allocate a AED 1,000,000 budget across three different campaigns: print media, mobile advertising, and social medi
> Par, Inc., produces a standard golf bag and a deluxe golf bag on a weekly basis. Each golf bag requires time for cutting and dyeing and time for sewing and finishing, as shown in the following table: The profits per bag and weekly hours available for cut
> Each coffee table produced by Kevin Watson Designers nets the firm a profit of $9. Each bookcase yields a $12 profit. Watson’s firm is small and its resources limited. During any given production period (of 1 week), 10 gallons of varnish and 12 lengths o
> A craftsman named William Barnes builds two kinds of birdhouses, one for wrens and a second for bluebirds. Each wren birdhouse takes 4 hours of labor and 4 units of lumber. Each bluebird house requires 2 hours of labor and 12 units of lumber. The craftsm
> Formulate your own optimization (maximization) problem with three variables, one objective, and three constraints.
> David Hall, chief of the maintenance department at Mechanical Dynamics, has presented you with the following failure curve. What does it suggest?
> Perform a “product-by-value” analysis on products A, B, C, D, and E.
> Daniel Glaser, chairman of the College of San Antonio’s business department, needs to assign professors to courses next semester. As a criterion for judging who should teach each course, Professor Glaser reviews the past 2 yearsâ&
> Tigers Sports Club has to select four separate coed doubles teams to participate in an interclub table tennis tournament. The preselection results in the selection of a group of four men—Raul, Jack, Gray, and Ajay—and
> The Baton Rouge Police Department has five detective squads available for assignment to five open crime cases. The chief of detectives, Jose Noguera, wishes to assign the squads so that the total time to conclude the cases is minimized. The average numbe
> Ravi Behara, the managing partner at a large law firm in Virginia, must assign three clients to three attorneys. Cost data are presented in the following table: Use the assignment algorithm to solve this problem.
> Dennis Geyer’s company wishes to assign a set of jobs to a set of machines. The following table provides data as to the cost of each job when performed on a specific machine. a) Determine the assignment of jobs to machines that will min
> Lifang Wu owns an automated machine shop that makes precision auto parts. He has just compiled an input–output report for the grinding work center. Complete this report and analyze the results.
> A local hypermarket in Kuwait supplies juice boxes from a manufacturer in Saudi Arabia. The reorder point, without safety stock, is 800 boxes. The carrying cost is KWD 20 (Kuwaiti Dinar) per box per year, and the ordering cost is KWD 50 per box per year.
> Authentic Thai rattan chairs (shown in the photo) are delivered to Gary Schwartz’s chain of retail stores, called The Kathmandu Shop, once a year. The reorder point, without safety stock, is 200 chairs. Carrying cost is $30 per unit per
> State the seven common measures of queuing system performance.
> Name the three factors that govern the structure of “arrivals” in a queuing system.
> When designing a waiting line system, what “qualitative” concerns need to be considered?
> Name the three parts of a typical queuing system.
> What should an operations manager keep in mind when looking at the results from a simulation model?
> Based on available information, lead time demand for PC jump drives averages 50 units (normally distributed), with a standard deviation of 5 drives. Management wants a 97% service level. a) What value of Z should be applied? b) How many drives should be
> How can an operations manager successfully use a simulation model?
> How many times do you need to run a Monte Carlo simulation to achieve an appropriate model? Why does it differ from model to model?
> What are the advantages of special-purpose simulation languages (see below)?
> State the seven steps, beginning with “Defining the Problem,” that an operations manager should perform when using simulation to analyze a problem.
> Why is Little’s Law a useful queuing concept?
> What dollar value do you place on yourself per hour that you spend waiting in lines? What value do your classmates place on themselves? Why do the values differ?
> What happens if two single-server systems have the same mean arrival and service rates, but the service time is constant in one and exponential in the other?
> Do doctors’ offices generally have random arrival rates for patients? Are service times random? Under what circumstances might service times be constant?
> What are the components of the following queuing systems? Draw and explain the configuration of each. a) Barbershop b) Car wash c) Laundromat d) Small grocery store
> Provide examples of four situations in which there is a limited, or finite, waiting line.
> Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed). Furthermore, the standard deviation for BX-5 was 7. Ms. Flynn would l
> A company has developed a promising new product and examines the following three alternatives of manufacturing. Alternative 1 is to buy a semiautomatic machine with an initial cost of €130,000. Alternative 2 is to buy a fully automatic machine with an in
> Discuss the likely outcome of a waiting line system where but only by a tiny amount (e.g.,
> Describe the behavior of a waiting line where / Use both analysis and intuition.
> Briefly describe three situations in which the first-in, first-out (FIFO) discipline rule is not applicable in queuing analysis.
> Which is larger, Ws or Wq? Explain.
> Describe what is meant by the waiting-line terms balk and renege. Provide an example of each.
> Is it good or bad to operate a supermarket bakery system on a strict first-come, first-served basis? Why?
> State the assumptions of the “basic” single-server queuing model (Model A, or M/M/1).
> Why is simulation such a widely used technique?
> Why might the results of a simulation differ each time you make a run?
> Huehn-Brown Products in St. Petersburg offers the following discount schedule for its 4-by-8-foot sheets of quality plywood. Home Sweet Home Company orders plywood from Huehn- Brown. Home Sweet Home has an ordering cost of $45. Carrying cost is 20%, and
> Why is it a good reason using a cumulative distribution as an input into a Monte Carlo simulation model?
> Explain the difference between simulated average demand and expected average demand.
> Lesedi Baard is the general manager of Quickmart, a South African convenience store. Quickmart offer a basic selection of items including food and beverages, homecare, household products, apparel, and hardware. Their target market includes people who nee
> Alabama Airlines opened its doors in December 2018 as a commuter service with its headquarters and hub located in Birmingham. The airline was started and managed by two former pilots, David Douglas and George Devenney. It acquired a fleet of 12 used prop
> A calculated optimal solution to a LP max problem is not always chosen. Explain why.
> Define the feasible region of a graphical LP problem. What is a feasible solution?
> What is a “corner point”? Explain why solutions to LP problems focus on corner points.
> List at least four applications of LP problems.
> Explain how to use the iso-cost line in a graphical minimization problem.
> How does a minimizing problem differ from a maximizing problem?
> Happy Pet, Inc., is a large pet store located in Long Beach Mall. Although the store specializes in dogs, it also sells fish, turtle, and bird supplies. The Everlast Leader, a leather lead for dogs, costs Happy Pet $7 each. There is an annual demand for
> Under what circumstances is the objective function more important than the constraints in an LP model?
> Why is it not advisable to round optimal solutions to nearest integer?
> Where a constraint crosses the vertical or horizontal axis, the quantity is fairly obvious. How does one go about finding the quantity coordinates where two constraints cross, not at an axis?
> Compare how the corner-point and iso-profit line methods work for solving graphical problems.
> From the manufacturing, organizational, and supply chain management points of view, what kind of challenges might a firm face in shifting its designing strategy from integrality to modularity?
> Define shadow price (or dual value).
> When introducing an additional constraint, what will happen to the solution of the optimization problem?
> Why is the diet problem, in practice, applicable for animals but not particularly for people?
> Good airline scheduling is essential to delivering outstanding customer service with high plane utilization rates. Airlines must schedule pilots, flight attendants, aircraft, baggage handlers, customer service agents, and ramp crews. At Alaska Airlines,
> Electric guitars made in China are relatively inexpensive and their quality keeps improving. In recent years, several companies realized that if they purchase semi-finished guitars, they can improve the consistency of the finished productsâ€&#
> Given the following data on a hardware item stocked by Andreas Wieland’s paint store in Copenhagen, should the quantity discount be taken? • D = 2,000 units; S = $10; H = $1; P = $1 • Discount price = $.75 • Quantity needed to qualify for discount = 2,00
> Frito-Lay, the massive Dallas-based subsidiary of PepsiCo, has 55 plants and 55,000 employees in North America. Seven of Frito-Lay’s 41 brands exceed $1 billion in sales: Fritos, Lay’s, Cheetos, Ruffles, Tostitos, Doritos, and Walker’s Potato Chips. Oper
> 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
> As an Internet exercise, explain the rationale behind the creation of EFQM, and the fundamental concept defining the Enablers in the model. See www.efqm.org.
> According to a recent study by Nielsen,* consumers used to prefer stock-up visits, but 46% of them view shopping as a chore. The one-stop shopping experience that had taken most of the world by storm a couple of decades ago is changing and Aldi, a German
> 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 reas
> 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 tha
> 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?
> Use the data in Solved Problem 5.1 to examine what happens to the decision if Sarah King can increase all of Design B yields from 59,000 to 64,000 by applying an expensive phosphorus to the screen at an added manufacturing cost of $250,000. Prepare the m
> Sox Engineering designs and constructs air conditioning and heating systems for hospitals and clinics. Currently, the company’s staff is overloaded with design work. There is a major design project due in 8 weeks. The penalty for comple
> Ritz Products’s materials manager, Tej Dhakar, must determine whether to make or buy a new semiconductor for the wrist TV that the firm is about to produce. One million units are expected to be produced over the life cycle. If the product is made, start-
> Zhong Factory manufactures different types of computer motherboards in batches. The demand for one of its motherboards is 200 units/day, while Zhong has a capacity of up to 1,000 motherboards/day. The factory operates 250 days per year. The setup cost is
> Residents of Mill River have fond memories of ice skating at a local park. An artist has captured the experience in a drawing and is hoping to reproduce it and sell framed copies to current and former residents. He thinks that if the market is good he ca
> Portland Savings and Loan is considering new computer software, which, because of installation and training cost, will have an unusual pattern of net receipts. The expected receipts are: $20,000 in year 1, nothing in the next year, $30,000 in year 3, and
> Cheryl Druehl needs to purchase a new milling machine. She is considering two different competing machines. Milling Machine A will cost $300,000 and will return $80,000 per year for 6 years, with no salvage value. Milling machine B will cost $220,000 and
> Given the contribution made on each of the three products in the following table and their position in the life cycle, identify a reasonable operations strategy for each:
> MacDonald Products, Inc., of Clarkson, New York, has the option of (a) proceeding immediately with production of a new top-of-the-line stereo TV that has just completed prototype testing or (b) having the value analysis team complete a study. If Ed Lus
> The product design group of Iyengar Electric Supplies, Inc., has determined that it needs to design a new series of switches. It must decide on one of three design strategies. The market forecast is for 200,000 units. The better and more sophisticated th
> Prepare a bill of material for a mechanical pencil.
> Prepare a bill of material for a computer mouse (GeniMouse).
> Prepare a bill of material for the table illustrated:
> Prepare a bill of material for a wooden pencil, complete with eraser.
> Al-Tawheed Discount Store sells a certain type of office chair for E£400. The annual holding cost is E£40 per unit per year, annual demand is 900 chairs, and the order cost is E£800 per order. The lead time is 14 days. The store is open 360 days per year
> Prepare a bill of material and an assembly chart for a salad of your own choosing.
> Develop the BOM for product XYZ made from two units of B, five units of C, and four units of D. B is subassembled from six units of E and two units of F; C from four units of E and three units of D, and D from two units of G and four units of H.
> Prepare a script for telephone callers at the university’s annual “phone-a-thon” fundraiser.
> Draw an assembly chart for a pair of eyeglasses and its case.
> Prepare a product-by-value analysis for the following products, and given the position in its life cycle, identify the issues likely to confront the operations manager and his or her possible actions. Product Alpha has annual sales of 1,000 units and a c
