ISYE 6644
PRACTICE EXAM QUESTIONS
WITH CORRECT DETAILED
ANSWERS | ALREADY GRADED
A+<RECENT VERSION>
1. What does separate do - ANSWER Duplicates a single entity or split multiple
entities that have been combined in a Batch module. If dealing with a permanent
batch, usually use duplicate original to get several customers all with the same
attributes. If temp batch, use split to get original attributes
2. Record Module - ANSWER Collect statistics when an entity passes through the
module
3. What options do you get in the replications tab - ANSWER Number of reps
Initialize between reps
Warm-up period
Rep length
Terminating Condition
4. What sort of options/tab can you change in run setup? - ANSWER Replications,
run speed, reports, run control
5. What are fake customers? - ANSWER Used to accomplish various tasks during a
sim e.g. calculate normal probabilities, keep track of time period, trigger breakdown
,6. Why use Seize, Delay, and Release modules in the Advance Process Template? -
ANSWER Sometimes you need to do things that are too complicated for the
Process module version of S-D-R e.g. Seize-Assign-Delay-Release, Seize and
Releases that depend on sets of servers
7. What is a good way to model failures in Arena - ANSWER Use Resource and
Failure spreadsheets in conjunction with each other (Failures column in Resource s/s -
> Failure s/s)
8. What are the types of failures you can model in Arena? - ANSWER Count (failure
after certain $ of arrivals) and Time (after a certain amount of time)
9. What are the types of failures rules? - ANSWER Ignore (complete service of
current customer and reduce repair time)
10. What is process interaction? - ANSWER Consider a generic customer (entity) and
the sequence of events and activities (processes) it undergoes as it moves through the
system. At any time the system may have many entities interacting with each other as
they compete for resources.
11. What is the template panel in Arena? - ANSWER Where you get your "stuff" i.e.
blocks, processes.
12. Which options in the toolbar help with various visualization aids? - ANSWER
Arrange, Object, Window
13. What does the Tools option in the toolbar have? - ANSWER Lots of cool toys,
including Input Analyzer, opt Quest, AVI capture, macros, etc
14. What are some "blocks"/modules in the top half of the Basic Process Template? -
ANSWER Create, Process, Dispose, Decide, Batch, Separate, Assign, Record
,15. How do you add more advanced templates in Arena? - ANSWER File > Template
Panel > Attach
16. What items are available in the bottom half of the Basic Process panel? What do they
do? - ANSWER Attribute, Entity, Queue, Resource, Variable, Schedule, Set
They are spreadsheets that are both informational and allow us to change certain
system parameters e.g. the Variable s/s defines global quantities such as WIP
17. Briefly explain the Create-Process-Dispose trio - ANSWER Create: Periodically
generate customer arrivals
Process: Have work performed on the customers; maybe have to wait in line
Dispose: Customers leave the system after service
18. What fields are in the Create module? - ANSWER Name, Entity (Customer) Type,
Time Between Arrivals, Entities per Arrival, Max Arrivals, First Creation
19. What fields are in the Process Module? - ANSWER Name, Type, Logic, Delay
Type
20. What actions can you take in the Process module and what options can you set within
these actions? - ANSWER Delay
Seize-Delay-Release
Seize-Delay
Delay-Release
You can set how many resources (workers) to Seize or Release
21. What is the Resource spreadsheet? - ANSWER A spreadsheet with a list of
resources that the model is using. Can set capacity, which is the number of resource
on duty. A resource is regarded as identical and interchangeable. Can create a new
resource in the process module or the resource spreadsheet.
, 22. What is the Schedule spreadsheet? - ANSWER Can set schedules for servers.
Enter schedule into duration box. Can also set schedule for arrivals e.g. in Create
change Time Between Arrivals to schedule.
23. What can an entity do at a Decide module? - ANSWER 2-way by Chance
N-way by Chance
2-way by Condition
N-way by Condition
24. What are attributes? - ANSWER Each customer passing through the system has
various properties (attributes).
25. What are variables? - ANSWER Unlike attributes, whose values are specific to
each customer, variables are global. If changed, it gets changed everywhere e.g. WIP
26. What can you do with an Assign module? - ANSWER You can change attributes
and variables e.g. entity pictures
27. What is the Attribute Spreadsheet? - ANSWER Keeps track of existing attributes
that you might define in an Assign module
28. What is the Variable Spreadsheet? - ANSWER Pretty much the same as Attribute
spreadsheet
29. What is the Entity spreadsheet? - ANSWER Allows you to set initial picture
30. What are internal variables - ANSWER Arena keeps track of and continuously
updates lots of stuff as the simulation runs
Examples:
PRACTICE EXAM QUESTIONS
WITH CORRECT DETAILED
ANSWERS | ALREADY GRADED
A+<RECENT VERSION>
1. What does separate do - ANSWER Duplicates a single entity or split multiple
entities that have been combined in a Batch module. If dealing with a permanent
batch, usually use duplicate original to get several customers all with the same
attributes. If temp batch, use split to get original attributes
2. Record Module - ANSWER Collect statistics when an entity passes through the
module
3. What options do you get in the replications tab - ANSWER Number of reps
Initialize between reps
Warm-up period
Rep length
Terminating Condition
4. What sort of options/tab can you change in run setup? - ANSWER Replications,
run speed, reports, run control
5. What are fake customers? - ANSWER Used to accomplish various tasks during a
sim e.g. calculate normal probabilities, keep track of time period, trigger breakdown
,6. Why use Seize, Delay, and Release modules in the Advance Process Template? -
ANSWER Sometimes you need to do things that are too complicated for the
Process module version of S-D-R e.g. Seize-Assign-Delay-Release, Seize and
Releases that depend on sets of servers
7. What is a good way to model failures in Arena - ANSWER Use Resource and
Failure spreadsheets in conjunction with each other (Failures column in Resource s/s -
> Failure s/s)
8. What are the types of failures you can model in Arena? - ANSWER Count (failure
after certain $ of arrivals) and Time (after a certain amount of time)
9. What are the types of failures rules? - ANSWER Ignore (complete service of
current customer and reduce repair time)
10. What is process interaction? - ANSWER Consider a generic customer (entity) and
the sequence of events and activities (processes) it undergoes as it moves through the
system. At any time the system may have many entities interacting with each other as
they compete for resources.
11. What is the template panel in Arena? - ANSWER Where you get your "stuff" i.e.
blocks, processes.
12. Which options in the toolbar help with various visualization aids? - ANSWER
Arrange, Object, Window
13. What does the Tools option in the toolbar have? - ANSWER Lots of cool toys,
including Input Analyzer, opt Quest, AVI capture, macros, etc
14. What are some "blocks"/modules in the top half of the Basic Process Template? -
ANSWER Create, Process, Dispose, Decide, Batch, Separate, Assign, Record
,15. How do you add more advanced templates in Arena? - ANSWER File > Template
Panel > Attach
16. What items are available in the bottom half of the Basic Process panel? What do they
do? - ANSWER Attribute, Entity, Queue, Resource, Variable, Schedule, Set
They are spreadsheets that are both informational and allow us to change certain
system parameters e.g. the Variable s/s defines global quantities such as WIP
17. Briefly explain the Create-Process-Dispose trio - ANSWER Create: Periodically
generate customer arrivals
Process: Have work performed on the customers; maybe have to wait in line
Dispose: Customers leave the system after service
18. What fields are in the Create module? - ANSWER Name, Entity (Customer) Type,
Time Between Arrivals, Entities per Arrival, Max Arrivals, First Creation
19. What fields are in the Process Module? - ANSWER Name, Type, Logic, Delay
Type
20. What actions can you take in the Process module and what options can you set within
these actions? - ANSWER Delay
Seize-Delay-Release
Seize-Delay
Delay-Release
You can set how many resources (workers) to Seize or Release
21. What is the Resource spreadsheet? - ANSWER A spreadsheet with a list of
resources that the model is using. Can set capacity, which is the number of resource
on duty. A resource is regarded as identical and interchangeable. Can create a new
resource in the process module or the resource spreadsheet.
, 22. What is the Schedule spreadsheet? - ANSWER Can set schedules for servers.
Enter schedule into duration box. Can also set schedule for arrivals e.g. in Create
change Time Between Arrivals to schedule.
23. What can an entity do at a Decide module? - ANSWER 2-way by Chance
N-way by Chance
2-way by Condition
N-way by Condition
24. What are attributes? - ANSWER Each customer passing through the system has
various properties (attributes).
25. What are variables? - ANSWER Unlike attributes, whose values are specific to
each customer, variables are global. If changed, it gets changed everywhere e.g. WIP
26. What can you do with an Assign module? - ANSWER You can change attributes
and variables e.g. entity pictures
27. What is the Attribute Spreadsheet? - ANSWER Keeps track of existing attributes
that you might define in an Assign module
28. What is the Variable Spreadsheet? - ANSWER Pretty much the same as Attribute
spreadsheet
29. What is the Entity spreadsheet? - ANSWER Allows you to set initial picture
30. What are internal variables - ANSWER Arena keeps track of and continuously
updates lots of stuff as the simulation runs
Examples:
