In a recent post I talked about the need to improve punctuality. I illustrated that the infamous metric 'percent on-time departures' is insufficient and inaccurately measuring the airport's or airline's performance. So if SAS claims to be the most punctual airline this summer then I salute them but I wonder what their actual on-time performance was. Wasn't there some airport closures? This is the first reason why there is no need to improve your on-time performance. You already seem to operate at a high level and the press and the public is happy.
The second reason not to bother is what an airport official from Sheremetyevo International said to Forbes, that in most cases, delayed departures are simply caused by flights arriving late from other airports.
As a third reason there is to mention that low-cost airlines frequently plan for short turnaround times on the ground. This can mean there is a higher likelihood of an aircraft possibly running late.
Let us not forget the capacity of airspace at many busy airports, air traffic also plays a role, as a fourth reason why we can't improve.
At the same time we can rely on Eurocontrol's delay analysis which says that more than 50% of all delays are caused by the airlines themselves. So, as a fifth argument, who should start to improve?
Last but not least we can disagree with the statistics, with the definition of punctuality (which flights to consider?) and the data source. Because airlines and airports do not want to provide flight information and share their on-time performance, there are some platforms like FlightStats that use any available data. We can argue, as a sixth point, that those figures are simply not correct.
Maybe you will find more of them and would like to share them with me.