NEW MODIFIED ISYE
6644 ARENA
|ISYE 6644 MIDTERM 1| ISYE 6644 MIDTERM 2
PRACTICE EXAM QUESTIONS WITH
CORRECT ANSWERS
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.
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.
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
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What are attributes? -- ANSWER--Each customer passing through the system
has various properties (attributes).
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
What can you do with an Assign module? -- ANSWER--You can change
attributes and variables e.g. entity pictures
What is the Attribute Spreadsheet? -- ANSWER--Keeps track of existing
attributes that you might define in an Assign module
What is the Variable Spreadsheet? -- ANSWER--Pretty much the same as
Attribute spreadsheet
What is the Entity spreadsheet? -- ANSWER--Allows you to set initial picture
What are internal variables -- ANSWER--Arena keeps track of and
continuously updates lots of stuff as the simulation runs
Examples:
TNOW (current sim time)
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NR(Barber) - # of resource Barber's servers now working
NQ(Process 1.Queue) = # of customers in that queue
Create 1.NumberOut = # of customers who have so far left the module Create 1
What kinds of display information can you display while a simulation is
running? -- ANSWER--Clock, calendar, variable displays, histograms, graphs
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.
What is the template panel in Arena? -- ANSWER--Where you get your "stuff"
i.e. blocks, processes.
Which options in the toolbar help with various visualization aids? -- ANSWER-
Arrange, Object, Window
What does the Tools option in the toolbar have? -- ANSWER--Lots of cool
toys, including Input Analyzer, OptQuest, AVI capture, macros, etc
What are some "blocks"/modules in the top half of the Basic Process Template?
-- ANSWER--Create, Process, Dispose, Decide, Batch, Separate, Assign,
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Record
How do you add more advanced templates in Arena? -- ANSWER--File >
Template Panel > Attach
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
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
What fields are in the Create module? -- ANSWER--Name, Entity (Customer)
Type, Time Between Arrivals, Entities per Arrival, Max Arrivals, First Creation
What fields are in the Process Module? -- ANSWER--Name, Type, Logic,
Delay Type