So why is BHX the only airport in the world, but also the UK, where these scanners are making the situation worse?
Maybe because, er, its still a construction site with sub-optimal queue routings, holding areas, etc. When i travelled through last week, it looked very much like the queuing area was restricted by unfinished works, temporary walls and the like. One presumes (hopes?) that they will be gone soon, providing a bit more space (upstairs
and downstairs), at which point the queue will function as intended.
The point i've repeatedly made - speaking from experience of managing impacts of transport construction projects during the main and late stages of a construction period - is that impacts can and will happen for the tiniest reason when the system isnt operating in its intended end state (i.e. all works complete, fully resourced, etc.), and that those impacts can snowball very quickly when they do occur. When the work is finished, that is the only time that we can really judge.
Im through there again tomorrow lunchtime - i'll see if anything has changed.
I agree with your point re staff. Though there is some complexity in adequately resourcing a very high peak period that lasts for a short period of time - e.g. do you ask a security staff member to do 4 hours in the morning then 4 in the afternoon? If so, do you pay them for the whole day, or to go home and come back again?, etc.
Re 20 minute delay - im a little skeptical of that figure. But that said, if several bags end up in rescan, that takes up the time of a security bod who could otherwise be doing something else. It looked like there was space for about 10 bags in rescan per scanner, when that fills up the whole thing has to stop (the old system obviously did the same). A more general problem i think though is the inability of many people to comprehend how security works and follow basic instructions ('excuse me madam, there is a space there, go to it', 'everything out of your pockets?'). I half suspect some of the queuing issues are nothing to do with the scanners, and everything to do with how quickly people are capable of getting themselves ready for security in the first place.
Anyway, im not a happy clapper for the airport (though i do have friends working there, and want it to do well as my (very) local airport, so i do hope that this all gets sorted out soon. The seeming lack of total panic from the airport suggests (perhaps?) that they fully expected what is happening and also fully expect it to settle down soon. At the end of the day, the 'negative' press on the Daily Mail etc. is hardly likely to stop anyone flying off on a well deserved holiday...!