The given charts illustrate various reasons that contributed to the delay of flights in an Asian country in 2015 and 2016.
Overall, there was an increase in the problems relating to bad weather, airport security and airline operations management, while a decline was seen in the figure for air traffic control and military factors. In addition, airline operations management was the leading cause of flight delays in both years; by contrast, the least influential reason was airport security in 2015 and military factors in the following year.
The delayed cases affected by airport security was 4% in 2015, after which it experienced a significant rise to 13% in 2016. Similar change, but to a lesser extent, can be observed in the percentage of bad weather, which accounted for 21% of the delays in 2015 and slightly went up to 23% in the next year. However, a reverse trend was witnessed in the impact of military factors, which decreased from 10% in 2015 to 6% at the end of the period.
25% of the flight delays was reported to be caused by air traffic control in 2015, followed by a considerable decrease to 12% in 2016. The proportion of delayed cases influenced by airline operations management rose from 40% in 2015 to 46% in 2016, remaining the major contribution to the flight delays in this particular country.