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ISYE6644 Simulation Midterm
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ISYE6644 Simulation Midterm 1 2024-2025Why might simulation be a good tool to analyze supply chains? (More than one answer below
may be correct.)
A) Supply chains are always deterministic systems.
B) Supply chains often have complicated network structures, making exact analysis difficult.
C) Supply chains are stochastic systems, with random travel times, lead times, and order
patterns.
D) Supply chain simulations can be programmed in a matter of minutes. - Correct Answer-B)
Supply chains often have complicated network structures, making exact analysis difficult.
C) Supply chains are stochastic systems, with random travel times, lead times, and order
patterns.
Suppose there are 40 random people in a room. What is the probability that at least two of
them will have the same birthday?
A) Close to 0
B) A bit less than 1/2
C) Almost exactly 1/2
D) Somewhat greater than 1/2 - Correct Answer-D) Somewhat greater than 1/2
,In fact, you only need 23 people in the room to achieve a probability of 1/2.
Inscribe a circle in a unit square and toss 1000 random darts at the square. Suppose that
800 of those darts land in the circle. Using the technology developed in this lesson, what is
the resulting estimate for 𝜋
A) -3.2
B) 2.8
C) 3.0
D) 3.2
E) 4.0 - Correct Answer-D) 3.2
Since the estimate 𝜋 = 4 x (proportion in circle). Note that (a) is the University of Georgia
answer, and is completely incorrect.
What are the advantages of simulation? - Correct Answer-1. Can study models too
complicated for analytical / numerical treatment
2. Study detailed relations that might be lost in the analytical or numerical treatment
3. Use as a basis for experimental studies of systems
4. Use to check results and give credibility to conclusions obtained by other methods.
5. Reduce design blunders
6. Really nice demo method
7. (sometimes) very easy
, What are the disadvantages of simulation? - Correct Answer-1. Sometimes not so easy
2. Sometimes very time consuming / costly
3. Simulations give "random" output (and lots of misinterpretation of results is possible)
4. To do a certain problem, better methods than simulation may exist
We are interested in modeling the arrival and service process at the local McBurger Queen
burger joint. Customers come in every once in a while, stand in line, eventually get served,
and off they go. Generally speaking, what kind of model are we talking about here? (More
than one answer below may be right.)
A) Discrete
B) Continuous
C) Stochastic
D) Deterministic - Correct Answer-(a) (because events such as arrivals and service
completions only happen once in a while, as opposed to continuously); and (c) (because
customer arrival times, service times, shift changes, etc., are all random).
Which of the following can be regarded as advantages of simulation? (More than one answer
below may be right.)
A) Simulation enables you to study models too complicated for analytical or numerical
treatment.
B) Simulations can serve as very pretty demos that even University of Georgia graduates
can understand.
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