Originally Posted by
Gonzo
Dave, when you say things like 'rightful place', what data are you using to decide that?
That's a fair question. The answer is: I'm using
Heathrow's own data.
For a description of the methodology that's supposedly being followed (but isn't), see:
Fly Quiet & Green - How We Calculate
Heathrow's rules can be summarised as follows:
Airlines gain a maximum aggregate score of 1,000 Fly Quiet & Green points by being in first place for every metric.
An airline in last (50th) place for any metric scores 0 points for that metric (so if a hapless airline was in last place for every metric, it would score zero points out of 1,000).
Overall league table scores are the aggregate of an airline's place-related scores for each of the seven metrics.
A weighting schema (as described in the link) determines the maximum points available for the different metrics - for CDA violations first place merits 268 points, first place for NOx emissions gets 89 points, etc.
So essentially, airlines gain points pro rata for every place above bottom ranking that they achieve for each metric, up to the maximum available for that metric.
If we apply
Heathrow's own rules to
its reported results for Oman Air, for example:
Heathrow ranks Oman Air 20th (out of 50 airlines) for CDA violations, and so the carrier forfeits 104 of the 268 available points for that one metric alone, thereby scoring 164 points for CDAs. Likewise another 60 points are deducted from a perfect score of 89 for its 34th place for NOx emissions, etc
So based on the 164 points deducted for those two metrics alone, Oman Air can't possibly merit an aggregate score awarded by Heathrow of 917 out of 1,000 !
In fact based on Heathrow's positions (see above) for all 7 metrics (including also 24th out of 50 for Noise quota count per seat), Oman Air forfeits a total of 230 points from a perfect 1,000 score, thereby achieving 770 points not 917.