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A queuing process is modeled as a birth-and-death process with mean arrival rates ?0 = 2, ?1 = 4, ?2 = 3, ?3 = 1, ?n= 0 for n > 3 and mean service rates.
A gas station has a single automated car wash. Cars arrive to the gas station according to a Poisson process with an average of 30 cars/h.
Assume that the depot is located at the origin of the grid and that the delivery trucks have a capacity of 1,200 gallons.
Many automobiles can be ordered in one of two engine sizes (examples are the Lincoln LS, the Lexus Coupe, and the Jaguar S Type).
Toyco produces a line of Bonnie dolls and accessories at its plants in New York and Baltimore that must be shipped to distribution centers in Chicago.
Resolve Pear’s transshipment problem assuming that an additional transshipment point is located at Oklahoma City.
The part is expected to be obsolete after 400 days. Assume that demands from one day to the next are independent.
The expected demand was the same in parts (a) and (b), but the optimal order quantities should have been different. What accounted for this difference?
Rank the item categories in decreasing order of the annual profit. Classify each in one of the categories as A, B, or C.
Describe the ABC classification system. What is the purpose of classifying items in this fashion?
Discuss both the exchange curve for replenishment frequency and inventory value and the exchange curve for expected number of stock-outs.
Annual demand for number 2 pencils at the campus store is normally distributed with mean 1,000 and standard deviation 250.
Assuming that all values of the demand from 20 to 70 are equally likely, what is the optimal number of cans of paint thinner for Al to buy each year?
Experience with the marketplace later shows that the demand is closer to a normal distribution, with mean 1,800 and standard deviation 480.
Design a spreadsheet to calculate the optimal order-up-to point for a newsvendor problem with normally distributed demands.
A large national producer of canned foods plans to purchase 100 combines that are to be customized for its needs.
Using the exponential smoothing equations given in Section 5.1, determine the current values for the mean and the MAD of monthly demand.
The home appliance department of a large department store is using a lot size–reorder point system to control the replenishment.
Bobbi’s Restaurant in Boise, Idaho, is a popular place for weekend brunch. The restaurant serves real maple syrup with french toast and pancakes.
The Crestview Printing Company prints a particularly popular Christmas card once a year and distributes the cards to stationery.
Billy’s Bakery bakes fresh bagels each morning. The daily demand for bagels is a random variable with a distribution estimated.
Betty Sucasas, a member of the marketing staff with a large company that produces a line of switches, has kept only grouped data.
Green’s Buttons of Rolla, Missouri, supplies all the New Jersey Fabrics stores with eight different styles of buttons for men’s dress shirts.
Suppose that Mac only kept track of the number of magazines sold. Would this give an accurate representation of the demand for the Journal?
A newsvendor keeps careful records of the number of papers he sells each day and the various costs that are relevant to his decision.