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Study Resources (Supply Chain Management)

Section 3   Queuing Costs 1) The cost of waiting decreases as the service level increases. 2) The study of waiting lines calculates the cost of providing good service but does not value the cost of customers' waiting time. 3) Which of the following occurs as the level of service decreases? A) Cost of waiting.
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31) Complete the following table in preparation for a Monte Carlo simulation. Demand Probability Cumulative Probability Interval of Random Numbers 1     01-20 2     21-25 3     26-50 4     51-80 5     81-00 32) Complete the following table in preparation for a Monte Carlo simulation. The expected demand is 3.52. Demand Probability Cumulative Probability Interval of Random Numbers 0   .1 2     11-23 3   .5 4       86-00 .
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27) Find the minimum cost solution for the transportation problem detailed in the table below. Before your solution can be implemented, you discover that the combination Source 3 — Destination 1 is unavailable, due to political turmoil in the country where Source 3 is located. Solve the revised problem. How much.
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46) Your company is making experimental turbochargers for a new design of high-powered farm tractors. The production schedule for these new components is contained in the table below. Month Turbochargers 1 4 2 6 3 7 4 8 5 5 The first turbocharger, a trial unit, took 900 hours to produce. Based on your experience with similar products, the learning curve is 85%..
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11) Which of the following best conveys the essence of learning curves? A) As the number of repetitions increases, time per unit increases. B) As the number of repetitions decreases, time per unit increases. C) As the number of repetitions increases, time per unit decreases. D) As the number of repetitions increases, time per.
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Section 3   Monte Carlo Simulation 1) By starting random number intervals at 01, not 00, the top of each range is the cumulative probability. 2) A simulation is "Monte Carlo" when the elements of a system being simulated exhibit chance in their behavior. 3) Random number intervals are based on cumulative probability distributions. 4).
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33) Which of the following is a measure of queue performance? A) utilization factor for the system B) average queue length C) probability of a specific number of customers in the system D) average waiting time in the line E) all of the above 34) Which of the following is most likely to be served in.
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Section 1   What Is a Learning Curve? 1) Experience curves may be valid for industrial applications, but have no role in services such as health care procedures. 2) Experience curves are the opposite of learning curves—as one rises, the other falls. 3) Learning curves are based on the premise that people and organizations.
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13) In queuing problems, which of the following probability distributions is typically used to describe the number of arrivals per unit of time? A) binomial B) normal C) Poisson D) exponential E) lognormal 14) In queuing problems, which of the following probability distributions is typically used to describe the time to perform the service? A) binomial B) normal C).
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Section 2   Learning Curves in Services and Manufacturing 1) The learning curve in the steel industry and the learning curve in heart transplants have both been estimated at 79 percent. 2) A project manager bases his time and labor estimates on a learning curve of 86%. The actual learning curve turns out.
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Section 1   Queuing Theory 1) Waiting-line models are useful to operations in such diverse settings as service systems, maintenance activities, and shop-floor control. A) service systems such as bank teller stations. B) maintenance activities that might repair broken machinery. C) shop-floor control activities. D) service systems such as amusement park rides. E) all of the above 3).
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20) What does the stepping-stone method do? 21) What is the difference between a feasible solution and an optimal solution? 22) Consider the transportation problem in the data set and optimal solution below. Verify by hand or by calculator (show your work) the value of the total shipping cost. 23) Find the minimum.
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31) To use the table of learning-curve coefficients, you must specify ________ and ________. 32) Identify one advantage and one disadvantage of the doubling approach over the formula approach to learning curve calculations. 33) In the formula approach to learning curve calculations, you have used the formula TN = T1 (Nb). For.
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Section 2   Advantages and Disadvantages of Simulation 1) One effective use of simulation is to study problems for which the mathematical models of operations management are not realistic enough. 2) Simulation allows managers to test the effects of major policy decisions on real-life systems without disturbing the real system. 3) Simulation provides optimal.
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11) Which of the following is TRUE regarding the use of simulation? A) It is always very easy to build a simulation model. B) It may interfere with real-world systems. C) It always yields optimal solutions. D) It allows time-compression in testing major policy decisions. E) Few constraints, if any, have to be considered. 12) Simulation.
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12) Why do different organizations have different learning curves? 13) When comparing a 70% learning curve versus a 90% learning curve, which one results in a more rapid reduction in labor requirements? Why? 14) What problems in scheduling can arise if adjustments for learning curve effects in operations are not made? 15) "By.
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20) When does degeneracy occur in a transportation model? 21) When is it necessary to add dummy sources or destinations to a transportation problem? 22) The larger a transportation problem (that is, as the problem has more rows and more columns), the smaller the fraction of all possible routes that will be.
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Section 4   Special Issues in Modeling 1) Degeneracy in a transportation problem is when no closed path exists for evaluating an unused cell. 2) A transportation problem with a total supply of 500 and a total demand of 400 will have an optimal solution that leaves 100 units of supply unused. 3) A.
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11) Consider the transportation problem and its optimal solution in the tables below. The cell Source 3 — Destination 3 is currently empty. What would be the change in the total shipping cost if the largest possible amount were shipped using that route, leaving all the supply and demand conditions.
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11) A transportation problem has 4 origins and 2 destinations. The optimal solution of this problem will fill no more than ________ cells with quantities to be shipped. A) 5 B) 6 C) 8 D) 20 E) All cells will be occupied. 12) A large transportation problem has 220 origins and 1360 destinations. The optimal solution.
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28) Explain the difference between random numbers and random number intervals. 29) Complete the following table in preparation for a Monte Carlo simulation. Demand Probability Cumulative Probability Interval of Random Numbers 0 .1     1 .15     2 .4     3 .15     4 .2     30) Suppose the following random numbers (1, 34, 22, 78, 56, 98, 00, 82) were selected during a Monte Carlo simulation that was based on.
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Section 1   What is Simulation? 1) Simulation has numerous applications in modern business, but few of these are in the area of operations. 3) Simulation may be capable of producing a more appropriate answer to a complex problem than can be obtained from a mathematical model. 4) Virtually all large-scale simulations take place.
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24) Consider the transportation data set for a minimization problem below. a. Calculate the initial solution using the northwest-corner rule. b. Calculate improvement indices, iterate, and solve for the optimal shipping pattern. 25) Find the minimum cost solution for the transportation problem detailed in the table below. Explain carefully the meaning of any.
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Section 3   Applying the Learning Curve 1) The doubling approach to learning curve calculations allows us to determine the hours required for any unit. 2) The formula approach to learning curve calculations allows us to determine the hours required for any unit. 3) The learning-curve table approach may be simpler to use than.
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24) Which of the following represents an unlimited queue? A) drive-through lane at a fast-food restaurant B) small barbershop with only 5 chairs for waiting customers C) toll booth serving automobiles on an interstate D) faculty office with limited seating during office hours E) restaurant with no outside seating and limited capacity due to fire.
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Section 4   Simulation and Inventory Analysis 1) Results of simulation experiments with large numbers of trials or long experimental runs will generally be better than those with fewer trials or shorter experimental runs. 2) In most real-world inventory problems, lead time and demand vary in ways that make simulation a necessity because.
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Section 3   The Stepping-Stone Method 1) The stepping-stone method frequently achieves an optimal solution as soon as it calculates an initial feasible solution. 2) When using the stepping-stone method, the improvement index for an unused cell equals the shipping cost associated with that cell. 3) In a transportation minimization problem, the negative improvement.
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Section 4   Strategic Implications of Learning Curves 1) A firm that successfully pursues a steeper-than-industry-average learning curve and manages costs down may still fail if, by underestimating a strong competitor, it fails to gain the added volume necessary for the learning curve to exist. 2) On an ordinary graph, unit times for.
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