1. Given the following table that presents the solution for a queuing problem with a constant service rate, the probability that the server is idle is
Correct : C. 0.286
2. Markov analysis is a technique that deals with the probabilities of future occurrences by
Correct : B. analyzing presently known probabilities.
3. Decision makers in queuing situations attempt to balance
Correct : B. service levels against service cost.
4. The manner in which units receive their service, such as FCFS, is the
Correct : A. queue discipline.
5. What queue discipline is assumed by the waiting line models presented in the textbook?
Correct : A. first-come first-served.
6. In Markov analysis, we are concerned with the probability that the
Correct : C. time has reached a steady state.
7. For a situation with weekly dining at either an Italian or Mexican restaurant,
Correct : A. the weekly visit is the trial and the restaurant is the state.
8. A transition probability describes
Correct : B. the probability a system in a particular state now will be in a specific state next period.
9. Performance measures dealing with the number of units in line and the time spent waiting are called
Correct : D. operating characteristic.
10. The probability of going from state 1 in period 2 to state 4 in period 3 is
Correct : C. p14
11. The probability that a system is in a particular state after a large number of periods is
Correct : A. independent of the beginning state of the system.
12. Analysis of a Markov process
Correct : A. describes future behavior of the system.
13. If the probability of making a transition from a state is 0, then that state is called a(n)
Correct : D. absorbing state.
14. Absorbing state probabilities are the same as
Correct : D. None of the alternatives is true.
15. Markov analysis might be effectively used for
Correct : D. all of the above
16. The following is not an assumption of Markov analysis.
Correct : B. The probability of changing states remains the same over time.
17. The total cost for a waiting line does NOT specifically depend on
Correct : D. the cost of a lost customer.
18. Markov analysis assumes that conditions are both
Correct : D. collectively exhaustive and mutually exclusive.
19. Occasionally, a state is entered which will not allow going to another state in the future.
This is called
Correct : D. none of the above
20. In Markov analysis, the likelihood that any system will change from one period to the next is revealed by the
Correct : B. transition-elasticities.
21. The condition that a system can be in only one state at any point in time is known as
Correct : C. Mutually exclusive condition.
22. At any period n, the state probabilities for the next period n+1 is given by the following formula:
Correct : D. n(n+1)=n(n)P
23. If we decide to use Markov analysis to study the transfer of technology,
Correct : B. our study will have only limited value because the Markov analysis tells us "what" will happen, but not "why."
24. The following data consists of a matrix of transition probabilities (P) of three competing companies, the initial market share state 16_10.gif(1), and the equilibrium probability states. Assume that each state represents a firm (Company 1, Company 2, and Company 3, respectively) and the transition probabilities represent changes from one month to the next. The market share of Company 1 in the next period is
Correct : D. 0.47
25. Markov analysis assumes that the states are both __________ and __________.
Correct : D. collectively exhaustive, mutually exclusive
26. A simulation model uses the mathematical expressions and logical relationships of the
Correct : A. real system.
27. The ________ determine(s) the equilibrium of a Markov process.
Correct : C. transition matrix
28. Values for the probabilistic inputs to a simulation
Correct : C. are randomly generated based on historical information.
29. A quantity that is difficult to measure with certainty is called a
Correct : C. probabilistic input.
30. A value for probabilistic input from a discrete probability distribution
Correct : B. is given by matching the probabilistic input with an interval of random numbers.
31. The number of units expected to be sold is uniformly distributed between 300 and 500. If r is a random number between 0 and 1, then the proper expression for sales is
Correct : D. 300 + r(200)
32. Common features of simulations--generating values from probability distributions, maintaining records, recording data and summarizing results--led to the development of
Correct : C. GPSS, SIMSCRIPT, SLAM, and Arena
33. In order to verify a simulation model
Correct : B. be sure that the procedures for calculations are logically correct.
34. Simulation
Correct : D. All of the alternatives are correct.
35. A simulation model used in situations where the state of the system at one point in time does not affect the state of the system at future points in time is called a
Correct : B. static simulation model.
36. When events occur at discrete points in time
Correct : D. All of the alternatives are correct.
37. The process of determining that the computer procedure that performs the simulation calculations is logically correct is called
Correct : C. verification.
38. Numerical values that appear in the mathematical relationships of a model and are considered known and remain constant over all trials of a simulation are
Correct : A. parameters.
39. The word "uniform" in the term "uniform random numbers" means
Correct : D. each number has an equal probability of being drawn.
40. The first step in simulation is to
Correct : D. define the problem.
41. Which of the following are disadvantages of simulation?
Correct : A. inability to analyze large and complex real-world situations
42. Cumulative probabilities are found by
Correct : C. summing all the previous probabilities up to the current value of the variable.
43. Which of the following statements is INCORRECT regarding the advantages of simulation?
Correct : B. Simulation guarantees an optimal solution.
44. If we are going to simulate an inventory problem, we must
Correct : B. Run the simulation for many days many times, i.e., using multiple sets of random numbers.
45. Simulation should be thought of as a technique for
Correct : C. obtaining an optimal solution to a problem.
46. In assigning random numbers in a Monte Carlo simulation, it is important to ________.
Correct : A. develop cumulative probability distributions
47. To simulate is to try to __________ the features, appearance, and characteristics of a real system.
Correct : D. Duplicate
48. The three types of mathematical simulation models are
Correct : A. operational gaming, Monte Carlo, systems simulation
49. Which of the following as an assumption of an LP model
Correct : D. all of the above
50. Most of the constraints in the linear programming problem are expressed as ……….
Correct : B. Inequality
51. A feasible solution to a linear programming problem
Correct : A. Must satisfy all problem constraints simultaneously
52. While plotting constraints on a graph paper, terminal points on both axes are connected by a straight line because
Correct : C. The constraints are linear equations or in equalities
53. Constraints in LP problem are called active if they
Correct : A. Represent optimal solution
54. The solution space of a LP problem is unbounded due to
Correct : C. Neither (a) nor (b)
55. The graphical method of LP problem uses
Correct : D. All the above
56. While solving LP problem graphically, the area bounded by the constraints is called
Correct : A. Feasible region
57. Which of the following is not a category of linear programming problems?
Correct : D. All of the above are categories of linear programming problems.
58. Which of the following may not be in a linear programming formulation?
Correct : B. >.
59. While solving an LP problem infeasibility may be removed by
Correct : C. Removing a constraint
60. A linear programming model does not contain which of the following components?
Correct : D. A spread sheet
61. Straight lines shown in a linear programming graph indicates
Correct : B. Constraints
62. In linear programming problem if all constraints are less than or equal to, then the feasible region is
Correct : B. Below the lines
63. ……. is a series of related activities which result in some product or services.
Correct : A. Network
64. Any activity which does not consume either any resource or time is called ………..activity.
Correct : C. Dummy
65. All negative constraints must be written as
Correct : C. Greater than or equal to
66. Activities that cannot be started until one or more of the other activities are completed, but immediately succeed them are called ……activities
Correct : B. Successor
67. An event which represents the beginning of more than one activity is known as ………..event.
Correct : C. Burst
68. If two constraints do not intersect in the positive quadrant of the graph, then
Correct : D. None of the above
69. An activity which must be completed before one or more other activities start is known as
……….activity.
Correct : A. Predecessor
70. Constraint in LP problem are called active if they
Correct : A. Represent optimal solution
71. While solving an LP problem, infeasibility may be removed by
Correct : C. Removing a constraint
72. ….……..is that sequence of activities which determines the total project time.
Correct : B. Critical path
73. Activities lying on the critical path are called………….
Correct : C. Critical activities
74. ………..models in which the input and output variables follow a probability distribution.
Correct : D. Deterministic model
75. ………. Example of probabilistic model
Correct : A. Game theory
76. Alternative solutions exists of an LP model when
Correct : B. Objective function equation is parallel to one of the constraints
77. . ………..is a method of analyzing the current movement of the same variable in an effort to predict the future movement of the same variable.
Correct : B. Markov analysis
78. Decision Science approach is
Correct : A. Multi-disciplinary
79. For analyzing a problem, decision-makers should study
Correct : C. Both a & b
80. Decision variables are
Correct : A. Controllable
81. A model is
Correct : D. All of the above
82. Managerial decisions are based on
Correct : D. All of the above
83. The use of decision models
Correct : D. None of the above
84. Every mathematical model
Correct : C. Represents data in numerical form
85. A physical model is example of
Correct : C. A verbal model
86. An optimization model
Correct : A. Provides the best decision
87. The quantitative approach to decision analysis is a
Correct : C. Scientific approach
88. The qualitative approach to decision analysis relies on
Correct : D. All of the above
89. The mathematical model of an LP problem is important because
Correct : A. It helps in converting the verbal description & numerical data into mathematical expression
90. Linear programming is a
Correct : D. All of the above
91. A constraint in an LP model restricts
Correct : D. All of the above
92. The distinguishing feature of an LP model is
Correct : A. Relationship among all variables is linear
93. Constraints in an LP model represents
Correct : D. All of the above
94. Non-negativity condition is an important component of LP model because
Correct : B. Value of variables make sense & correspond to real-world problems
95. Before formulating a formal LP model, it is better to
Correct : D. All of the above
96. Maximization of objective function in an LP model means
Correct : A. Value occurs at allowable set of decisions
97. Which of the following is not a characteristic of the LP model
Correct : B. An objective function of maximization type
98. The best use of linear programming technique is to find an optimal use of
Correct : D. All of the above
99. Which of the following is not a characteristic of the LP
Correct : D. The problem must be of minimization type
100. Non-negativity condition in an LP model implies