WHAT IS THE SECRECT BEHIND THE AIRLINE SATISFACTION RANKING ? News: According to the website: http://www.airfarewatchdog.com/blog/23248943/best-airlines-2015-edition/ Overall, things are looking good for the airlines. Customer satisfaction has increased an average of 2.9 per - cent—the highest the industry's seen since its peak in 1994. Travelers cite improvements to the booking and flight experiences, specifically timeliness and baggage handling, as the major reasons for the upward trend. (Note: canceled flights and on-time arrivals took a hit during the first two months of the year due to harsh winter conditions experienced by much of the nation.) So, let's get to it. Our winner this year is (drum roll, please) Alaska Airlines! This isn't surprising, as the airline has been in the top four since we debuted our list nearly four years ago. Delta, which came in first last year and stayed in the top three this year, continues to be a standout among the other legacy carriers, which still lag behind. And for the first time ever, we've included Spirit, which the Department of Transportation (DOT) now in - cludes in its reports. Below is an in-depth look at the rankings. Intentions: Absolutely, the website provides us with an overall performance ranking for US airlines. However, without some more specific description, customers will still feel confused. So the question is what is hehind the rank - ing? What are the factors which can affect this ranking? I just figure out some important factors like the number of fights during 2015, the number of passerngers that have been served per day or the number of destination that airline can provide for customers to choose? And from these bunch of data, then by using some visualiza - tion analysis, what is the relationship between the ranking and the factors? Or customers can figure out what would attract them most from this visualization. Citation: Author: All data source: Hao Wang (Master of Architecture Path2.5 2017) http://www.transtats.bts.gov/HomeDrillChart.asp?URL_SelectMonth=9&URL_SelectYear=2015 NUMBER OF FLIGHT AND PASSERNGENS BACKGROUND OF EACH AIRLINE BASIC INFORMATION SPECIFIC ANALYSIS OF SEPT IN 2015 ON-TIMA ARRIVAL PERFORMANCE 0 1 2 3 4 5 6 7 8 9 10 Overall Performance Ranking 0 100,000 200,000 300,000 400,000 500,000 600,000 700,000 800,000 900,000 Number of Flight Annually 0 100,000 200,000 300,000 Number of Passerngens Served per day 0 100 200 300 400 500 600 700 Number of Destination 0 100 200 300 400 500 600 700 800 900 Number of Craft 0 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 90,000 100,000 Number of Operations (Sept. 2015) 0 10 20 30 40 50 60 70 80 90 Percent of On-time (%) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Percent of Air Carrier Delay (%) 0.0 0.5 1.0 Percent of Weather Delay (%) 0 1 2 3 4 5 6 7 8 9 10 Percent of National Aviation System Delay (%) 0.00 0.10 0.20 Percent of Security Delay (%) 0.0 1.0 2.0 3.0 4.0 5.0 Percent of Aircraft Arriving Late (%) 0.0 0.5 Percent of Cancelled (%) 0.00 0.10 Percent of Diverted (%)