Deck 1: Introduction to Modeling

Question 1

Which of the following is not one of the desired conditions for a successful model implementation?

A) The people who will run the model understand how to enter appropriate inputs
B) The people who will run the model are able to run what-if analysis
C) The people who will run the model are able to modify it
D) The people who will run the model are able to interpret the model's outputs correctly

Answer 1

C

Question 2

Models that suggest a desirable course of action are called descriptive models

Answer 2

False

Question 3

One of the advantages of spreadsheet models is that they allow managers to ask what-if questions.

Answer 3

True

Question 4

Which of the following is not one of the guiding principles for a heuristic?

A) Common sense
B) Intuition
C) Trial and error
D) Optimality

Question 5

Which of the following is not one of advantages of mathematical models?

A) Mathematical models enable managers to understand the problem better
B) Mathematical models allow analysts to employ a variety of mathematical solution procedures
C) The mathematical modeling process itself,if done correctly,often helps "sell" the solution
D) Mathematical models help reduce the cost of obtaining a solution

Question 6

In modeling situations where it is not possible to write an equation for an output in terms of the inputs,there may still be a mathematical procedure for calculating outputs from inputs.

Question 7

Defining an organization's problem includes:

A) specifying the organization's objectives
B) collecting the organization's historical data
C) defining the model of the problem
D) sensitivity analysis

Question 8

In a descriptive model,the manager first wants to build a model that reflects the current situation.

Question 9

The modeling process discussed in Practical Management Science is a

A) seven-step process
B) six-step process
C) five-step process
D) four-step process

Question 10

Which of the following is a type of model that is key to virtually every management science application?

A) Heuristic model
B) Queuing model
C) Mathematical model
D) Regression model

Question 11

Before trusting the answers to what-if scenarios from a spreadsheet model,a manager should attempt to:

A) validate the model
B) make sure all possible scenarios have been investigated
C) check the mathematics in the model
D) sense-check the model

Question 12

Optimization models are useful for determining:

A) sensitivity to inputs
B) whether the inputs are valid or not
C) what the manager should do
D) the value of the output under the current conditions

Question 13

One of the arguments that management science practitioners have used to criticize the emphasis on specific models is that they do not provide the correct answer.

Question 14

Which of the following is not one of the reasons for the new-found relevance of management science models?

A) Modeling is an important way to think about problems in general
B) Modeling is often now a legal requirement
C) The business world is increasingly driven by numbers
D) Modeling helps develop intuition for problems

Question 15

The most frequent cause of a failed implementation of a model is:

A) the model is incorrect
B) the analyst fails to communicate how to use the model
C) the data for the model is unavailable
D) the model is too complex

Question 16

Which of the following type of model is used when an appropriate equation or system of equations can be developed to represent the system?

A) Simulation model
B) Analytical model
C) Heuristic model
D) Spreadsheet model

Question 17

Management science has often been taught as a collection of:

A) theories
B) problems
C) models
D) topics

Question 18

Which of the following is a possible cause if a model's outputs for certain inputs are not as expected?

A) The certain inputs may not be correct
B) The model could be too detailed of an approximation of the actual situation
C) The mathematics in the model might be incorrect
D) The expected outputs are not correct

Question 19

A first step in determining how well a model fits reality is to:

A) check whether the inputs are correct
B) see if the sensitivity analysis is correct
C) check whether the model is valid for the current situation
D) try some what-if scenarios to see if the model is able to obtain solutions

Question 20

Which of the following is not necessarily a property of a good model?

A) The model represents the client's real problem accurately
B) The model is as simple as possible
C) The model is based on a well-known algorithm
D) The model is one the client can understand

Question 21

The best strategy for implementation of a model is to involve key people in the organization in the project when the model is ready for testing and verification.

Question 22

As models become larger and more complex,heuristic solutions are often adequate,even though they are not necessarily optimal solutions.

Question 23

Verification is typically the most difficult phase of the modeling process,from a mathematical perspective.

Question 24

The overall modeling process typically done in practice always requires seven steps: define the problem,collect and summarize data,develop a model,verify the model,select one or more suitable decisions,present the results to the organization,and finally implement the model and update it through time.

Question 25

A completed model typically marks the end of the modeling process.

Question 26

Data are often not in the required form,in which case it is the analysts' job to gather the right data and put it into an appropriate format.

Question 27

Modeling is a process where the essence of a theoretical problem is extracted into a model,spreadsheet or otherwise.

Question 28

A good model should achieve the right balance between being too simple and too complex.

Question 29

In some applications,an analyst might present several alternative solutions from a model,and let the organization choose the best one.

Question 30

A management science model is typically initiated when an organization believes it has a problem.