ISYE6644 Midterm 2 Exam Questions and Answers Fully Solved
TRUE or FALSE? You can pre-assign a service time as an attribute before you actually get to the server
that you'll be using. - Answers True
TRUE or FALSE? If you have Create module generating one-at-a-time customer arrivals, then it is not
possible to use a different Create module with 4-at-a-time customer arrivals. - Answers False
TRUE or FALSE? Fake customers can be used to schedule machine breakdowns, keep track of which time
period the simulation is currently in, and carry out other duties not associated with actual customers. -
Answers True
Which module/spreadsheet is NOT in the Advanced Process panel? - Answers Process Module. This is in
the Basic Process panel.
Why are things like Seize, Delay, Release in multiple templates? - Answers The Process module does not
allow us to use Seize, Delay, Release with sufficient generality.
TRUE or FALSE? You can schedule failures to occur after a random number of customers have used a
resource or after a random amount of time has passed. - Answers True
TRUE or FALSE? You are only allowed to schedule one type of failure for a particular resource. - Answers
False
Which block is NOT in the Blocks template? - Answers Process block. There is no such thing. However,
the Process module is in the Basic Process panel.
TRUE or FALSE? The Queue block can connect up to the Seize module from the Advanced Process
template. - Answers False
Which kinds of sets are allowed? - Answers Resources set, counter set, entity type set, entity picture set
TRUE or FALSE? It is possible for the resource Joey to be a member of three different resource sets. -
Answers True
TRUE or FALSE? For easy display and organizational purposes, our Call Center simulation is divided into
several submodels. - Answers True
TRUE or FALSE? The customer arrival pattern for our Call Center changes over the day and is therefore
modeled as a nonhomogeneous Poisson proces. - Answers True
TRUE or FALSE? All of the Tech Support servers for our Call Center are equally skilled and have the same
concurrent work schedules. - Answers False
TRUE or FALSE. In our Call Center demo, fake customers are used to update a variable that keeps track
of the period of the day. - Answers True
, Consider our Call Center demo. What is the following Seize request asking for? Set, Product 1, 1,
Preferred Order, Agent - Answers Grab one server from the set Product 1 in the order listed when the
set was defined, and store that guy's identity int he attribute Agent.
TRUE or FALSE. In our inventory demo, fake customers are used to initiate a periodic inventory review. -
Answers True
Consider the Arena expression DISC(0.3,1,0.5,3,1.0,6) which is a discrete random variable. What is the
random variable's expected value? - Answers (0.3)(1) + (0.5-0.3)(3) + (1.0-0.5)(6) = 3.9
Consider a vanilla (s,S) = (5,12) inventory policy. If my inventory slips to 3, how many items do I order? -
Answers 9.
Since 3<s, we order S-3 = 9
TRUE or FALSE? It's perfectly OK for a customer to go from server 1 to server 2 and then back to server
1. - Answers True
TRUE or FALSE? Crazy stuff can happen if you start fooling around with multiple server visits, service
priorities, and server times. - Answers True
TRUE or FALSE? There are 100s of SMARTs files for you to play around with. - Answers True
Modules and spreadsheets from which panels are used in the demo? - Answers Basic Process, Advanced
Process, Advanced Transfer
((1==1)*10) + ((1==0)*5) = ? - Answers 10
TRUE or FALSE? You can find individual Seize, Delay, and Release modules in this template (Advanced
Process Template). - Answers True
Where can you find some sort of Seize? - Answers Within a Process module in the Basic Process
template, A seize module in the Advanced Process template, A Seize block in the Blocks template
Where can you set the buffer size of a certain queue? - Answers In a Queue block in the Blocks template
TRUE or FALSE? It's possible to request servers in a set randomly, cyclically, or according to some priority
characteristic (such as the order in which they are placed in the set). - Answers True
What would I do to change the lead time of orders from my supplier to UNIF(0,1) days (which happens
to be a little faster than the current lead time)? - Answers Go to the Expression spreadsheet in the
Advanced Process template and change the expression Delivery Lag to UNIF(0,1). OR Go to the "Wait for
Delivery" Delay module in the main program and change the expression Delivery Lag to UNIF(0,1)
If you wanted to change a part's sequence of stations, what would you do? - Answers Use the Sequence
spreadsheet in the Advanced Transfer template.
TRUE or FALSE? You can pre-assign a service time as an attribute before you actually get to the server
that you'll be using. - Answers True
TRUE or FALSE? If you have Create module generating one-at-a-time customer arrivals, then it is not
possible to use a different Create module with 4-at-a-time customer arrivals. - Answers False
TRUE or FALSE? Fake customers can be used to schedule machine breakdowns, keep track of which time
period the simulation is currently in, and carry out other duties not associated with actual customers. -
Answers True
Which module/spreadsheet is NOT in the Advanced Process panel? - Answers Process Module. This is in
the Basic Process panel.
Why are things like Seize, Delay, Release in multiple templates? - Answers The Process module does not
allow us to use Seize, Delay, Release with sufficient generality.
TRUE or FALSE? You can schedule failures to occur after a random number of customers have used a
resource or after a random amount of time has passed. - Answers True
TRUE or FALSE? You are only allowed to schedule one type of failure for a particular resource. - Answers
False
Which block is NOT in the Blocks template? - Answers Process block. There is no such thing. However,
the Process module is in the Basic Process panel.
TRUE or FALSE? The Queue block can connect up to the Seize module from the Advanced Process
template. - Answers False
Which kinds of sets are allowed? - Answers Resources set, counter set, entity type set, entity picture set
TRUE or FALSE? It is possible for the resource Joey to be a member of three different resource sets. -
Answers True
TRUE or FALSE? For easy display and organizational purposes, our Call Center simulation is divided into
several submodels. - Answers True
TRUE or FALSE? The customer arrival pattern for our Call Center changes over the day and is therefore
modeled as a nonhomogeneous Poisson proces. - Answers True
TRUE or FALSE? All of the Tech Support servers for our Call Center are equally skilled and have the same
concurrent work schedules. - Answers False
TRUE or FALSE. In our Call Center demo, fake customers are used to update a variable that keeps track
of the period of the day. - Answers True
, Consider our Call Center demo. What is the following Seize request asking for? Set, Product 1, 1,
Preferred Order, Agent - Answers Grab one server from the set Product 1 in the order listed when the
set was defined, and store that guy's identity int he attribute Agent.
TRUE or FALSE. In our inventory demo, fake customers are used to initiate a periodic inventory review. -
Answers True
Consider the Arena expression DISC(0.3,1,0.5,3,1.0,6) which is a discrete random variable. What is the
random variable's expected value? - Answers (0.3)(1) + (0.5-0.3)(3) + (1.0-0.5)(6) = 3.9
Consider a vanilla (s,S) = (5,12) inventory policy. If my inventory slips to 3, how many items do I order? -
Answers 9.
Since 3<s, we order S-3 = 9
TRUE or FALSE? It's perfectly OK for a customer to go from server 1 to server 2 and then back to server
1. - Answers True
TRUE or FALSE? Crazy stuff can happen if you start fooling around with multiple server visits, service
priorities, and server times. - Answers True
TRUE or FALSE? There are 100s of SMARTs files for you to play around with. - Answers True
Modules and spreadsheets from which panels are used in the demo? - Answers Basic Process, Advanced
Process, Advanced Transfer
((1==1)*10) + ((1==0)*5) = ? - Answers 10
TRUE or FALSE? You can find individual Seize, Delay, and Release modules in this template (Advanced
Process Template). - Answers True
Where can you find some sort of Seize? - Answers Within a Process module in the Basic Process
template, A seize module in the Advanced Process template, A Seize block in the Blocks template
Where can you set the buffer size of a certain queue? - Answers In a Queue block in the Blocks template
TRUE or FALSE? It's possible to request servers in a set randomly, cyclically, or according to some priority
characteristic (such as the order in which they are placed in the set). - Answers True
What would I do to change the lead time of orders from my supplier to UNIF(0,1) days (which happens
to be a little faster than the current lead time)? - Answers Go to the Expression spreadsheet in the
Advanced Process template and change the expression Delivery Lag to UNIF(0,1). OR Go to the "Wait for
Delivery" Delay module in the main program and change the expression Delivery Lag to UNIF(0,1)
If you wanted to change a part's sequence of stations, what would you do? - Answers Use the Sequence
spreadsheet in the Advanced Transfer template.
