Three Myths About Airport Punctuality

While Ryanair is boasting to be the most punctual European airline, Oman Air celebrates one day of 100% on-time performance on April 26 this year. Unfortunately there is no public data that proves any of these claims.

What about airports? In April 2011 London Heathrow published a record 94% departure punctuality.  Now they are Britain's worst airport according to the Civil Aviation Authority (CAA).

I think it's time to wade through some of the myths and confusion surrounding airport punctuality.

1. Punctuality is an internationally standardized metric.

Punctuality targets are usually defined in terms of 15-minute punctuality, i.e. a flight is counted as departing on-time if the plane goes off-blocks within 15 minutes of the scheduled time of  departure. But what is "15 minutes"? Is it more than 14'59" or more than 15' or even more than 15'59"? Now some airports and airlines may disagree on this but even ACI, IATA and AEA don't. If they do, then it will probably be 15'59", stealing another minute from the passenger, airline and airport capacity just to look better.

And, have you compared off-blocks times of airport and airline? Some airports check and validate differences within +/- 1 minute, most don't. Result: airport and airline report different punctuality figures.

2. Punctuality is a great metric to benchmark.

In previous posts I was highlighting some flaws of punctuality as a metric.

• Cancellations of delayed flights improve punctuality
• Indicator ignores size of aircraft and number of passengers affected
• No assessment about the financial loss possible
• Mix of performance which can be influenced with exogenous factors
• Difficult to determine improvement measures

Why is it still used, even as internal target? Because it is easy to understand and when it is bad, it can be easily attributed to exogenous factors.

3. Eurocontrol A-CDM improves airport punctuality.

There is no evidence that ECTRL A-CDM improves punctuality. Yes, it might reduce taxi times but with a negative effect on departure punctuality. With the lack of evidence I did some research myself and present the findings in my next post.

I know it is easy to lament. What do I have to offer instead? An approach and metrics to actually address the issue together with other stakeholders. Because the airport can have that 360° view and not just the silo view by every other stakeholder.

The problem with early flight arrivals

Some of the most common of the aggravations affecting air travelers is a flight delay or a cancellation. An early arrival of the inbound aircraft of their respective outbound flight is good news. It increases their chances of a timely departure. Not so good for the arriving passengers though if the ground staff is not ready yet. Which happened quite often to me - no one there to operate the air bridge or no one there to open the door from the air bridge to the terminal.

Not so good news for the airport as well, because early arrivals can be a disruption just like late arrivals.

Usually, airports plan for 15 minute buffers in their resource allocation (stands, gates). Fifteen minutes before Scheduled Time of Arrival (STA) and after. Sure, an early arrival helps when the airport endeavors short turnaround times. But if a flight arrives earlier then the planned buffer, it means that the airport has to cater for costly reserve capacities. Furthermore, there will be many changes affecting the operation.

What can an airport do against this? They can demand slot adherence, or the airline(s) will loose that slot and/or tell them that there will be no stand available. In a collaborative manner, of course, the airport will first approach them, raise the problem and discuss joint measures.

Let us grow off-peaks

Many airports continuously operate at or above capacity. Not necessarily throughout the day, but during peak hours. The most obvious solution to this problem is to make the airport infrastructure match the demand. However, there may be economical, political, environmental, space, time or other constraints preventing this. What about other approaches which are feasible without major investments and in a shorter timeframe?

Obviously, you can improve your current operational performance. You will find posts here about efficiency and effectivity, basically doing the right things right. There is, however, an area I have not explored yet, why not grow off-peaks? Let me explore two out of many textbook solutions to this problem.

Peak Pricing

One straight forward approach would be to differentiate the price of airport slots between different periods. There are often significant variations in the demand for slots at different times of day, on different days of the week and during different months of the year which can result in airports operating at full capacity at peak periods, whilst many slots may remain unused at off-peak periods. If the price of a peak period slot was higher than the price of an off-peak slot the demand for slots may be rescheduled.

Aviation Marketing

Aviation/airline marketing teams work together with airlines to explore market opportunities, support start-up operations and to help maintain a positive long-term partnership between the airline and the airport. Now this sounds great and simple to attract airlines for peak times. It may be hard though to attract them for off-peak periods, but let me give you an example on how this could be achieved. There may be this legacy carrier which is the only airline flying a specific route. Suppose you can convince an airline, e.g. a no frill airline, to operate to the same destination during off-peak times. How? Maybe you offer them a kick-back for every additional passenger on this route, including additional passengers flying on the legacy carrier. Winners? The airport, the new airline and ground handlers. Loosers? The legacy carrier which looses some yield, but do you care as an airport?

I am not sure whether this works at every airport, it has worked at least at one. Why not give it a try?