What’s Unit Cost?

[Ref. The Global Airline Industry Edited By Peter Belobaba, Amedeo Odoni and Cynthia Barnhart © 2009 John Wiley & Sons, L td. ISBN: 978-0-470-74077-4] Unit cost, which is an important measure of cost efficiency, both over time and across airlines. It’s defined as the total operating expense divided by the ASK produced by an airline, […]

What’s ASK (or ASM)?

[Ref. The Global Airline Industry Edited By Peter Belobaba, Amedeo Odoni and Cynthia Barnhart © 2009 John Wiley & Sons, L td. ISBN: 978-0-470-74077-4] Available Seat Kilometer (ASK) is the most common measure of airline output (capacity). It’s defined as one available seat flown 1 kilometer: ASK = Num. of seat available x KM traveled […]

What’s Yield in traffic?

[Ref. The Global Airline Industry Edited By Peter Belobaba, Amedeo Odoni and Cynthia Barnhart © 2009 John Wiley & Sons, L td. ISBN: 978-0-470-74077-4] Yield = total passenger revenues / RPK Yield is a measure of the average fare paid by all passengers per kilometer (or mile) flown. For example, if an airline records 140,000 […]

What’s RPK (or RPM)?

[Ref. The Global Airline Industry Edited By Peter Belobaba, Amedeo Odoni and Cynthia Barnhart © 2009 John Wiley & Sons, L td. ISBN: 978-0-470-74077-4] Revenue Passenger Kilometer (RPK) is the most common measure of airline traffic. It’s defined as one paying passenger transported 1 kilometer: RPK = Num. of paid passenger x KM traveled RPK […]

Traffic v.s Demand

[Ref. The Global Airline Industry Edited By Peter Belobaba, Amedeo Odoni and Cynthia Barnhart © 2009 John Wiley & Sons, L td. ISBN: 978-0-470-74077-4] “Total demand” = Traffic + Rejected demand (a.k.a Spill) For passenger airlines: “Traffic” refers to enplaned passengers. “Airline traffic” is the amount of airline output that is actually consumed or sold. […]

EASA puts forward measures to cut tyre-pressure accident risk

[Ref Flight International Magazine 17-23 March 2020] The European Union Aviation Safety Agency (EASA) has published a proposal to require monitoring to ensure tyre pressure does not fall below the minimum serviceable inflation threshold during operations. EASA says this can be achieved either through provision of a task within continued airworthiness instructions, requiring operators to […]