What does a 6-minute inspection consist of? May I guess? Hefting the supers, splitting the brood boxes to look for QCs (which also confirms stores present), going through the top box for evidence of Q+, appraisal of strength of colony, and twice-annual disease check (all bees off frames etc) spread across the average.
ADD Since Langs, maybe not all on doubles, in which case rather than splitting and lifting a few frames, a quick rifle through frames looking for QCs and Q+ not every visit but according to judgment.
It is impossible to 'get it' without coming out with us. I have explained this many times but in many cases it just does not get through without seeing it in the field.
NONE of our hives run on doubles or even one and a half in the active management season (April to late June). However from late June we take away the excluders and let the queen run. It largely kills off the swarming for the year so full examinations beyond that point are not economic to do and gets us loads of field bees for heather time.
The kind of examination you suggest would have a budget of about 3 mins......and is not adequate, yet also of no use as we do not run that way. No text book systems here, they just bog you down in unnecessary work.
We find out everything we need to know in the time available, make the decisions, and carry out the actions.
6 mins average is NOT just for the examination, it is for all actions. The system is geared to it. My personal average per colony is about 3 mins, up to 5 or 6 if there is a lot of splitting. Like I say, you have to see it to understand that we really do cover all RELEVANT bases.
The nest is checked EVERY visit, and yes, we do the full disease checks, and my staff are very good at it, and one of them has even earned the nickname 'eagle eyes' from local inspectors, as she spots EVERYTHING.
It can be hard to visualise, but remember we are not operating like a one person system. We turn up as a team, and the gopher is very important to maintaining pace at critical times, as the skilled person can devote ALL their time to the bees, not running back and forward to the truck and raking about looking for stuff.
We have c 800 Smiths (our old core unit and an easy hive to work with, amazingly almost 40% faster than the Nationals we punted a few years ago due to inefficiency. We know it sounds odd as they are both BS hives but over several seasons running hundreds of hives of both it proved true)
450 Wooden Langstroths (our least productive hives but fast to work)
1500 Poly Langstroths. One size box on this, every box and comb interchangeable.
From time to time people come out with us and they are always surprised at how quickly yet accurately we work. It is amazing how fast a good learner can develop the trained eye that picks things out. You get to a point where you see things and the register just by scanning rather than direct looking. There are so many clues that lead you to having a more in depth look, and your eye picks them up in seconds. You just KNOW from experience. We acquire experience at a rate few can comprehend, each of them seeing enough broodnests in one season and making enough observations and disease checks that would take an average amateur with 6 hives some 150 to 200 years to accumulate. (Its not really a linear comparison, but I am sure you get the point) That's where the pace comes from.