Department of Industrial Engineering
Faculty of Engineering
King Abdulaziz University
IE 622: Systems Simulation
Homework # 2 (100 Points)
Assigned: Monday, Feb 17th, 2025
Due: Wednesday, Mar 5th, 2025 (at 11:59 pm)
Assignment General Instructions:
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This homework must be completed individually. There can be collaboration regarding explanation of
relevant concepts and methodology; however, each person’s assignment is to be written up by that
person ONLY and no files, text, graphs, figures, tables, etc. are to be shared.
This homework must be submitted using Blackboard.
This homework must be submitted on time, in a high-quality and professional manner. It should be
neatly presented and understandable.
For each problem in this assignment, you must show all work and fully explain your answers to
receive full credit, although partial credit will be given.
You must use Microsoft Word to write up this assignment.
No late homework accepted.
1. (15 points) Problem 1 in Banks, Carson, Nelson and Nicol (2010), Page 455.
2. (15 points) The King Abdulaziz International Airport Check-In Process. Passengers arrive at the Flynas
Airlines ticketing area in Terminal A at the King Abdulaziz International Airport and proceed to the
check-in process to get their boarding passes. After check-in, the passengers proceed to the security
checkpoint.
Passengers arrive according to an exponential distribution with an average interarrival time of 1
minute. Passengers walk to the ticketing counter at a rate that is uniformly-distributed between 2
and 4 miles per hour. Passengers travel 50 yards from the terminal entrance to the check-in area.
Following the check-in process, the passengers then must walk 65 yards to the security checkpoint.
The check-in area currently has 4 ticketing agents to process passengers, who wait in a single line.
The check-in process takes between 2 and 5 minutes, uniformly-distributed, to complete.
Create a Simio simulation model of this check-in process and run the model for 20 replications for 24
hours each.
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a. (5 points) What is the average time of passengers waiting at check-in? What is the 95%
confidence interval?
b. (5 points) What is the average number of passengers waiting at check-in? What is the 95%
confidence interval?
c. (5 points) What is the average time in the system for passengers? What is the 95% confidence
interval?
d. (5 points) What is the average number of passengers in the system? What is the 95% confidence
interval?
e. (5 points) What is the average utilization of the ticket agents? What is the 95% confidence
interval?
3. (30 points) After further study of the King Abdulaziz International Airport Flynas Airlines check-in
process, it is noticed that there is more than one type of check-in (i.e., curbside check-in or inside
check-in). Also, it is noticed that there is more than one type of passenger (i.e., passengers who
check-in at the curb or inside and passengers who check-in online and have no luggage to check).
Modify the model constructed for Problem 2 to handle the routing to two different check-in areas
(curbside and at the ticket counter) as well as the routing of passengers who check-in online. Table
3.1 summarizes the percent of passengers who follow the three routes.
Route 1: Passengers who use the curbside check-in need to walk 10 yards to reach the station where
a single curbside agent takes between 1 and 5 minutes, with a most likely time of 2 minutes, to
check in a passenger. After the passengers have checked in, the passengers walk 125 yards to the
security checkpoint.
Route 2: Passengers who use the inside check-in first need to walk 50 yards to reach the ticketing
counter, where there are currently two airline ticket agents (instead of 4 previously) checking
passengers into the airport. It takes between 3 and 10 minutes uniformly to process each passenger.
Once the passengers have checked in, the passengers then walk 65 yards to reach the security
checkpoint.
Route 3: Passengers who have checked in online and do not need to check any luggage, only need to
walk the 125 yards to the security checkpoint once they arrive to the terminal.
Table 3.1. Passenger Type Percentages
Passenger Check-In Type
Percentage
Curbside Check-In
10%
Inside Check-In
70%
No Check-In (Carry on)
20%
Create a Simio simulation model of this revised check-in process and run the model for 20
replications for 24 hours each.
After running the simulation model, you must answer the following questions.
a. (5 points) What is the average time of passengers waiting at check-in? What is the 95%
confidence interval?
b. (5 points) What is the average number of passengers waiting at check-in? What is the 95%
confidence interval?
c. (5 points) What is the average time in the system for passengers? What is the 95% confidence
interval?
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d. (5 points) What is the average number of passengers in the system? What is the 95% confidence
interval?
e. (5 points) What is the average utilization of the curbside agent? What is the 95% confidence
interval?
f. (5 points) What is the average utilization of the ticket agents? What is the 95% confidence
interval?
4. (25 points) You must interpret and compare the simulation results from Problem 2 to those from
Problem 3.
a. (10 points) First, provide a brief explanation and interpretation of the absolute performance of
each check-in process.
(15 points) Then, compare the relative performance of the two check-in processes. Which
scenario is the better scenario? Why and why not?
b.
Assignment Submission Instructions:
You should submit the Microsoft Word file that summarizes your answers to the problems as well as the
Simio simulation models to complete this assignment. The name of the file should be of the following
format:
• IE622_SP2025hw02_LastName.docx
• IE622_ SP2025hw02p02_LastName.spfx
• IE622_ SP2025hw02p03_LastName. spfx
o For example:
▪ If I were to submit this file and I worked alone, I would name the file:
• IE622_ SP2025hw02_Bakhsh.docx
• IE622_SP2025hw02p02_Bakhsh.spfx
• IE622_SP2025hw02p03_Bakhsh. spfx
• Also, your name should be somewhere in the file so that it will appear on the hardcopies if the file is
printed.
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