ISYE 6644 MIDTERM AND FINAL EXAM QUESTIONS & ANSWERS | 100%
VERIFIED SOLUTIONS |QUESTIONS WITH CORRECT ANSWERS 2026 LATEST
UPDATE!!
Question 1
Consider a vanilla (s,S) = (5,12) inventory policy. If your current inventory level is 3, how many
items should you order?
A) 5
B) 12
C) 9
D) 2
E) 0
Correct Answer: C) 9
Rationale: In an (s,S) inventory policy, an order is placed only when the current inventory
level falls below the reorder point 's'. Since the current inventory (3) is less than the reorder
point (5), an order is triggered. The quantity ordered is the amount needed to bring the
inventory back to the target level 'S'. Therefore, Order Quantity = S - Current Inventory =
12 - 3 = 9.
Question 2
In a discrete-event simulation model, is it permissible for a customer entity to move from Server
1 to Server 2 and then back to Server 1?
A) No, this creates a logic loop that will crash the software.
B) Yes, this is perfectly acceptable and common in rework or re-entry systems.
C) No, entities must follow a linear sequence from lower-numbered to higher-numbered stations.
D) Yes, but only if the servers are in the same Advanced Set.
E) Only if the simulation is running in the "Continuous" mode.
Correct Answer: B) True
Rationale: Entities in simulation models, such as Arena, are guided by logical modules
(Decide, Route, or Sequence). There is no physical or logical restriction preventing an entity
from revisiting a station, which frequently occurs in manufacturing "rework" scenarios or
medical triage systems.
Question 3
When adjusting complex service priorities and varying service times across multiple server
visits, what is a likely outcome for the simulation results?
A) The results will always become more predictable.
B) The variance of the output will always decrease.
C) Complex or "crazy" behaviors and interactions can occur that are difficult to predict
analytically.
D) The simulation will automatically default to a first-come-first-served (FCFS) priority.
E) The CPU time required for the simulation will decrease.
Correct Answer: C) True
, 2
Rationale: Combining multiple visits, different priorities, and stochastic service times
introduces non-linear dynamics into the system. Small changes in priority rules can lead to
significant bottleneck shifts or unexpected queue lengths, which is why simulation is used
instead of simple queueing theory for such systems.
Question 4
In the Arena software, what are "SMARTs" files?
A) Files that contain the AI logic for the simulation.
B) Encrypted data files that store license information.
C) Hundreds of small, documented example files provided to demonstrate specific modeling
techniques.
D) Files used to link Arena to external CAD software.
E) Automated backup files created every 5 minutes.
Correct Answer: C) True
Rationale: Arena provides a library of "SMARTs" (Simulation Model And Related
Technology) files. These serve as pre-built examples for users to explore specific functions,
such as how to model a conveyor, a failure, or a complex decision logic.
Question 5
Which combination of panels is commonly used in Arena to handle basic logic, complex
resource seizing, and entity movement between stations?
A) Basic Process, Advanced Process, and Advanced Transfer.
B) Data Definition, Input Analyzer, and Output Analyzer.
C) Flowchart, Spreadsheet, and Animation.
D) Blocks, Elements, and Support.
E) Reports, Navigation, and Project Bar.
Correct Answer: A) Basic Process, Advanced Process, Advanced Transfer
Rationale: Modeling a complete system typically requires the 'Basic Process' for general
flow, 'Advanced Process' for detailed resource management (Seize/Delay/Release), and
'Advanced Transfer' for station-to-station movement (Route/Sequence).
Question 6
Evaluate the Arena-style expression: ((1==1)*10) + ((1==0)*5). What is the result?
A) 5
B) 15
C) 10
D) 0
E) 1
Correct Answer: C) 10
Rationale: In Arena and many programming languages, a true logical statement (1==1)
, 3
evaluates to 1, and a false statement (1==0) evaluates to 0. Therefore, (1 * 10) + (0 * 5) = 10
+ 0 = 10.
Question 7
Where can you find individual Seize, Delay, and Release modules if you do not want to use the
combined 'Process' module?
A) The Basic Process Template.
B) The Advanced Process Template.
C) The Blocks Template.
D) Both B and C.
E) The Animation Template.
Correct Answer: D) True
Rationale: While the 'Process' module in the Basic Process template combines Seize-Delay-
Release, you can use individual modules from the Advanced Process template or the Blocks
template for more granular control over resource management.
Question 8
Which of the following is a location where you could find a "Seize" functionality in Arena?
A) Within a Process module in the Basic Process template.
B) Within a Seize module in the Advanced Process template.
C) Within a Seize block in the Blocks template.
D) All of the above.
E) Only B and C.
Correct Answer: D) All of the above
Rationale: Arena offers multiple levels of modeling. The Basic Process template is user-
friendly, the Advanced Process template is more detailed, and the Blocks template
represents the underlying SIMAN code. All three contain Seize functionality.
Question 9
In which module or block can you manually set the specific buffer size (capacity) of a queue?
A) The Create module.
B) The Process module.
C) The Queue block in the Blocks template.
D) The Resource spreadsheet.
E) The Schedule module.
Correct Answer: C) In a Queue block in the Blocks template
Rationale: While spreadsheets show queue status, the capacity/limit of a queue is
specifically defined in the Queue block (within the Blocks template) or through the use of
specific logic modules that check current queue length before an entity enters.
, 4
Question 10
Is it possible to request a resource from a set (e.g., a pool of workers) using logic other than
"Random"?
A) No, Arena defaults to random selection for sets.
B) Yes, you can use selection rules like Cyclic, Preferred Order, or Specific Member.
C) Yes, but only if the set contains fewer than 5 members.
D) No, cyclic selection is only possible for sequences, not resources.
E) Only through external VBA coding.
Correct Answer: B) True
Rationale: When an entity seizes a resource from a set, the user can define a selection rule.
'Cyclic' ensures an even workload, 'Preferred Order' selects the first available member
based on a list, and 'Random' distributes the load stochastically.
Question 11
You wish to change the lead time of orders from a supplier to follow a Uniform(0,1) distribution.
Where is the most efficient place to make this change in a large model?
A) Open every Delay module and type "UNIF(0,1)".
B) Go to the Expression spreadsheet in the Advanced Process template and edit the "Delivery
Lag" entry.
C) Change the Create module for the entities.
D) Use the Input Analyzer to force the distribution.
E) It cannot be changed once the simulation starts.
Correct Answer: B) Go to the Expression spreadsheet in the Advanced Process template and
change the expression Delivery Lag to UNIF(0,1)
Rationale: Using global Expressions is a best practice in Arena modeling. It allows you to
change a value in one spreadsheet (the Expression spreadsheet) which then updates all
modules that reference that expression (like the Delivery Delay), saving time and reducing
errors.
Question 12
If you need to change the order of stations a part visits during a simulation, which tool should
you use?
A) The Route module.
B) The Station spreadsheet.
C) The Sequence spreadsheet in the Advanced Transfer template.
D) The Decisions flowchart.
E) The Entity spreadsheet.
Correct Answer: C) Use the Sequence spreadsheet in the Advanced Transfer template.
Rationale: The Sequence spreadsheet allows the modeler to define an ordered list of stations
VERIFIED SOLUTIONS |QUESTIONS WITH CORRECT ANSWERS 2026 LATEST
UPDATE!!
Question 1
Consider a vanilla (s,S) = (5,12) inventory policy. If your current inventory level is 3, how many
items should you order?
A) 5
B) 12
C) 9
D) 2
E) 0
Correct Answer: C) 9
Rationale: In an (s,S) inventory policy, an order is placed only when the current inventory
level falls below the reorder point 's'. Since the current inventory (3) is less than the reorder
point (5), an order is triggered. The quantity ordered is the amount needed to bring the
inventory back to the target level 'S'. Therefore, Order Quantity = S - Current Inventory =
12 - 3 = 9.
Question 2
In a discrete-event simulation model, is it permissible for a customer entity to move from Server
1 to Server 2 and then back to Server 1?
A) No, this creates a logic loop that will crash the software.
B) Yes, this is perfectly acceptable and common in rework or re-entry systems.
C) No, entities must follow a linear sequence from lower-numbered to higher-numbered stations.
D) Yes, but only if the servers are in the same Advanced Set.
E) Only if the simulation is running in the "Continuous" mode.
Correct Answer: B) True
Rationale: Entities in simulation models, such as Arena, are guided by logical modules
(Decide, Route, or Sequence). There is no physical or logical restriction preventing an entity
from revisiting a station, which frequently occurs in manufacturing "rework" scenarios or
medical triage systems.
Question 3
When adjusting complex service priorities and varying service times across multiple server
visits, what is a likely outcome for the simulation results?
A) The results will always become more predictable.
B) The variance of the output will always decrease.
C) Complex or "crazy" behaviors and interactions can occur that are difficult to predict
analytically.
D) The simulation will automatically default to a first-come-first-served (FCFS) priority.
E) The CPU time required for the simulation will decrease.
Correct Answer: C) True
, 2
Rationale: Combining multiple visits, different priorities, and stochastic service times
introduces non-linear dynamics into the system. Small changes in priority rules can lead to
significant bottleneck shifts or unexpected queue lengths, which is why simulation is used
instead of simple queueing theory for such systems.
Question 4
In the Arena software, what are "SMARTs" files?
A) Files that contain the AI logic for the simulation.
B) Encrypted data files that store license information.
C) Hundreds of small, documented example files provided to demonstrate specific modeling
techniques.
D) Files used to link Arena to external CAD software.
E) Automated backup files created every 5 minutes.
Correct Answer: C) True
Rationale: Arena provides a library of "SMARTs" (Simulation Model And Related
Technology) files. These serve as pre-built examples for users to explore specific functions,
such as how to model a conveyor, a failure, or a complex decision logic.
Question 5
Which combination of panels is commonly used in Arena to handle basic logic, complex
resource seizing, and entity movement between stations?
A) Basic Process, Advanced Process, and Advanced Transfer.
B) Data Definition, Input Analyzer, and Output Analyzer.
C) Flowchart, Spreadsheet, and Animation.
D) Blocks, Elements, and Support.
E) Reports, Navigation, and Project Bar.
Correct Answer: A) Basic Process, Advanced Process, Advanced Transfer
Rationale: Modeling a complete system typically requires the 'Basic Process' for general
flow, 'Advanced Process' for detailed resource management (Seize/Delay/Release), and
'Advanced Transfer' for station-to-station movement (Route/Sequence).
Question 6
Evaluate the Arena-style expression: ((1==1)*10) + ((1==0)*5). What is the result?
A) 5
B) 15
C) 10
D) 0
E) 1
Correct Answer: C) 10
Rationale: In Arena and many programming languages, a true logical statement (1==1)
, 3
evaluates to 1, and a false statement (1==0) evaluates to 0. Therefore, (1 * 10) + (0 * 5) = 10
+ 0 = 10.
Question 7
Where can you find individual Seize, Delay, and Release modules if you do not want to use the
combined 'Process' module?
A) The Basic Process Template.
B) The Advanced Process Template.
C) The Blocks Template.
D) Both B and C.
E) The Animation Template.
Correct Answer: D) True
Rationale: While the 'Process' module in the Basic Process template combines Seize-Delay-
Release, you can use individual modules from the Advanced Process template or the Blocks
template for more granular control over resource management.
Question 8
Which of the following is a location where you could find a "Seize" functionality in Arena?
A) Within a Process module in the Basic Process template.
B) Within a Seize module in the Advanced Process template.
C) Within a Seize block in the Blocks template.
D) All of the above.
E) Only B and C.
Correct Answer: D) All of the above
Rationale: Arena offers multiple levels of modeling. The Basic Process template is user-
friendly, the Advanced Process template is more detailed, and the Blocks template
represents the underlying SIMAN code. All three contain Seize functionality.
Question 9
In which module or block can you manually set the specific buffer size (capacity) of a queue?
A) The Create module.
B) The Process module.
C) The Queue block in the Blocks template.
D) The Resource spreadsheet.
E) The Schedule module.
Correct Answer: C) In a Queue block in the Blocks template
Rationale: While spreadsheets show queue status, the capacity/limit of a queue is
specifically defined in the Queue block (within the Blocks template) or through the use of
specific logic modules that check current queue length before an entity enters.
, 4
Question 10
Is it possible to request a resource from a set (e.g., a pool of workers) using logic other than
"Random"?
A) No, Arena defaults to random selection for sets.
B) Yes, you can use selection rules like Cyclic, Preferred Order, or Specific Member.
C) Yes, but only if the set contains fewer than 5 members.
D) No, cyclic selection is only possible for sequences, not resources.
E) Only through external VBA coding.
Correct Answer: B) True
Rationale: When an entity seizes a resource from a set, the user can define a selection rule.
'Cyclic' ensures an even workload, 'Preferred Order' selects the first available member
based on a list, and 'Random' distributes the load stochastically.
Question 11
You wish to change the lead time of orders from a supplier to follow a Uniform(0,1) distribution.
Where is the most efficient place to make this change in a large model?
A) Open every Delay module and type "UNIF(0,1)".
B) Go to the Expression spreadsheet in the Advanced Process template and edit the "Delivery
Lag" entry.
C) Change the Create module for the entities.
D) Use the Input Analyzer to force the distribution.
E) It cannot be changed once the simulation starts.
Correct Answer: B) Go to the Expression spreadsheet in the Advanced Process template and
change the expression Delivery Lag to UNIF(0,1)
Rationale: Using global Expressions is a best practice in Arena modeling. It allows you to
change a value in one spreadsheet (the Expression spreadsheet) which then updates all
modules that reference that expression (like the Delivery Delay), saving time and reducing
errors.
Question 12
If you need to change the order of stations a part visits during a simulation, which tool should
you use?
A) The Route module.
B) The Station spreadsheet.
C) The Sequence spreadsheet in the Advanced Transfer template.
D) The Decisions flowchart.
E) The Entity spreadsheet.
Correct Answer: C) Use the Sequence spreadsheet in the Advanced Transfer template.
Rationale: The Sequence spreadsheet allows the modeler to define an ordered list of stations
