It's the first time I've seen mention of "baggage misconnects" as being something that is potentially affected by the trial. And as it is directly related to the "passenger experience" I'm surprised they haven't included a metric for it in the protocol.
I'd guess there is a long list of outcomes that the SEATF could have listed as being dependent on punctuality, of which "baggage misconnects" is one ("passenger misconnects" too, come to that).
Presumably the 15 minute punctuality figures in the daily stats are intended as a proxy for all of those consequences too.
Interestingly, for the whole of the trial the punctuality stats, quoted as a percentage to 2 decimal places, have a zero as their second decimal (for example last Wednesday's were 89.70% for arrivals and 91.10% for departures). The odds of that happening for 121 consecutive days must be astronomical. Either that or someone needs to brush up on their maths:
Significant figures - Wikipedia, the free encyclopedia