ISYE6644 MIDTERM 2 EXAM PREP
2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS
|| 100% GUARANTEED PASS
<BRAND NEW VERSION>
1. TRUE or FALSE? You SEIZE-DELAY-RELEASE a conveyor. -
ANSWER ✓ False
2. An ENTER module is usually paired with what other module? -
ANSWER ✓ LEAVE
3. Which property is not desirable for a good pseudo-random number
generator? - ANSWER ✓ We must be able to look up the series of
PRNs from a table.
4. Which of the following PRN generators aren't very good? -
ANSWER ✓ Generators involving physical devices such as coin
flips or at least significant digit readings from an atomic clock,
random number tables, von Neuman's mid-square method,
Fibonacci and additive congruential generators.
5. What are some ways to handle different service times? - ANSWER
✓ 1. Pre-assign the service times as an attribute in an assign
module
, 2. Use Assign to store each customer's arrival time as an attribute
using TNOW
3. Record departure times, allowing us to get average cycle times
for any of the 3 types of parts
or
Instead of assign module, wait until the Process module and use
logical expression (x==y)=1 if x=y, 0 otherwise.
E.g. (Entity.Type == Part A) * TRIA(1,3,4) + (Entity.Type == Part
B) * WEIB(2.5,5.3)
6. 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
7. 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
8. 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)
9. 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)
10. What are the types of failures rules? - ANSWER ✓ Ignore
(complete service of current customer and reduce repair time)
Wait (complete service of current customer and delay the repair)
, Preempt (stop service of current customer and complete service
after repair)
11. What are Blocks template? - ANSWER ✓ They're sort of a
self-contained language related to SIMAN, very specialized and
low-level. Mainly used because certain blocks can only connect
with these blocks (e.g. Queue -> Seize)
12. What does an alter block do? - ANSWER ✓ Change the
number of servers in a resource
13. What is the Set s/s used for? - ANSWER ✓ To create a set of
distinct servers, with different schedules, service speeds, service
specialties, etc
14. What is one issue you can come across with resource sets? -
ANSWER ✓ When using Seize-Delay-Release, must makes sure
you release the same server that you originally seized.
15. In Seize box, use Type: Set, in preferred order, and save the
Resource/Sever name as an attribute. In Release box, release
specific member stored in that attribute
16. What type of Seize selection rules are possible for sets? -
ANSWER ✓ Cyclical, Random, Preferred Order, Specific
Member, Largest Remaining Capacity
17. How do you access SMART demos - ANSWER ✓ Libraries
> Documents > Rockwell Software > Arena
18. What are some important Transfer Panel Modules and what
do they do - ANSWER ✓ Station - Somewhere you can go
, Route - Tells you where you're going. Similar to Connect except it
takes time
Enter - General way to get into a Station
Leave - General way to depart a Station
19. What is a Sequence s/s used for - ANSWER ✓ Allows each
type of customer to follow a different path through the system
(station to station)
20. What are advanced sets - ANSWER ✓ Found in advanced
process panel, used for crazy types of sets e.g. sets of sequences.
Think of it as a vector
21. What are different ways you can travel between stations? -
ANSWER ✓ Resource (e.g. an assistant) - Seize-Release
Transporter (e.g. a car) - Request-Free, requires Distance Set
Conveyor - Access-Exit, requires a Segment Set
22. What are the desired properties of the algorithm that
produces PRNs? - ANSWER ✓ Output appears to be iid Unif(0,1)
Very Fast
Ability to reproduce any sequence it generates
23. What are some lousy generators? - ANSWER ✓ Random
devices
Random number tables
Mid-square method (square a number and take the middle parts)
Fibonacci and Additive Congruential Generators (Xi = Xi-1 + Xi-
2)mod m)
24. What is a full period generator? - ANSWER ✓ An LCG with
cycle length m (generally a good thing)
2025/2026 ACCURATE QUESTIONS
WITH CORRECT DETAILED ANSWERS
|| 100% GUARANTEED PASS
<BRAND NEW VERSION>
1. TRUE or FALSE? You SEIZE-DELAY-RELEASE a conveyor. -
ANSWER ✓ False
2. An ENTER module is usually paired with what other module? -
ANSWER ✓ LEAVE
3. Which property is not desirable for a good pseudo-random number
generator? - ANSWER ✓ We must be able to look up the series of
PRNs from a table.
4. Which of the following PRN generators aren't very good? -
ANSWER ✓ Generators involving physical devices such as coin
flips or at least significant digit readings from an atomic clock,
random number tables, von Neuman's mid-square method,
Fibonacci and additive congruential generators.
5. What are some ways to handle different service times? - ANSWER
✓ 1. Pre-assign the service times as an attribute in an assign
module
, 2. Use Assign to store each customer's arrival time as an attribute
using TNOW
3. Record departure times, allowing us to get average cycle times
for any of the 3 types of parts
or
Instead of assign module, wait until the Process module and use
logical expression (x==y)=1 if x=y, 0 otherwise.
E.g. (Entity.Type == Part A) * TRIA(1,3,4) + (Entity.Type == Part
B) * WEIB(2.5,5.3)
6. 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
7. 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
8. 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)
9. 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)
10. What are the types of failures rules? - ANSWER ✓ Ignore
(complete service of current customer and reduce repair time)
Wait (complete service of current customer and delay the repair)
, Preempt (stop service of current customer and complete service
after repair)
11. What are Blocks template? - ANSWER ✓ They're sort of a
self-contained language related to SIMAN, very specialized and
low-level. Mainly used because certain blocks can only connect
with these blocks (e.g. Queue -> Seize)
12. What does an alter block do? - ANSWER ✓ Change the
number of servers in a resource
13. What is the Set s/s used for? - ANSWER ✓ To create a set of
distinct servers, with different schedules, service speeds, service
specialties, etc
14. What is one issue you can come across with resource sets? -
ANSWER ✓ When using Seize-Delay-Release, must makes sure
you release the same server that you originally seized.
15. In Seize box, use Type: Set, in preferred order, and save the
Resource/Sever name as an attribute. In Release box, release
specific member stored in that attribute
16. What type of Seize selection rules are possible for sets? -
ANSWER ✓ Cyclical, Random, Preferred Order, Specific
Member, Largest Remaining Capacity
17. How do you access SMART demos - ANSWER ✓ Libraries
> Documents > Rockwell Software > Arena
18. What are some important Transfer Panel Modules and what
do they do - ANSWER ✓ Station - Somewhere you can go
, Route - Tells you where you're going. Similar to Connect except it
takes time
Enter - General way to get into a Station
Leave - General way to depart a Station
19. What is a Sequence s/s used for - ANSWER ✓ Allows each
type of customer to follow a different path through the system
(station to station)
20. What are advanced sets - ANSWER ✓ Found in advanced
process panel, used for crazy types of sets e.g. sets of sequences.
Think of it as a vector
21. What are different ways you can travel between stations? -
ANSWER ✓ Resource (e.g. an assistant) - Seize-Release
Transporter (e.g. a car) - Request-Free, requires Distance Set
Conveyor - Access-Exit, requires a Segment Set
22. What are the desired properties of the algorithm that
produces PRNs? - ANSWER ✓ Output appears to be iid Unif(0,1)
Very Fast
Ability to reproduce any sequence it generates
23. What are some lousy generators? - ANSWER ✓ Random
devices
Random number tables
Mid-square method (square a number and take the middle parts)
Fibonacci and Additive Congruential Generators (Xi = Xi-1 + Xi-
2)mod m)
24. What is a full period generator? - ANSWER ✓ An LCG with
cycle length m (generally a good thing)
