The Dynamic range has no relevance to the operator setting the geometry. Dynamics are for mechanical engineers..... Have a read of this it may help you understand the 'Static and Dynamic' conundrum.
www.wheels-inmotion.co.uk/forum/index.php?showtopic=213
Hmmmmm, had a read of that. Agree with most of what you say regarding the need to go for good accuracy setting up geometry, but regarding your interpretation of the manufactures specifications, surely you are mistaken!
You say the manufacturer's 'specified range' is in fact the full dynamic range over the whole suspension travel. I.e. the complete range of positions the suspension can take whilst moving, from full droop to full bump, in full roll and at full lock. Well it surely isnt, and actually can't be. The specified range is just that - the manufacturers specified static settings with an allowed tolerance either side. For example (using the figures on the printout in your linked thread) the static camber (at laden ride height) can be set anywhere from -0.50 to +0.40 (and ideally bang in the middle) and that vehicle will operate within the manufacterers intended parameters. If the specified range shown was in fact the full dynamic range, the 'specified range' on the machine would be well over 5 degrees on camber. Similarly with toe - the machines will give a specified range of only about 0.10 degrees to set within, but due to toe-out-on-turns (ackerman) the dynamic range of toe is around 1.5 degrees. Caster will have 0 dynamic range (well actually it will change a tiny amount with mcpherson strut suspension) but here the manufacturers specified range will be a good degree or so allowing for manufacturing tolerance and bush wear.
You quite rightly point out that the full dynamic range would be irrelevant to setting up static geometry - so I ask why the manufacterers would bother supplying that information and why the machines would display it? The answer is that the specified range is not the full dynamic range, but simply the static setting with a tolerance. Also, if the specified range was the full suspension/steering travel, it wouldn't necessarily be correct to aim for the middle of this range for the static settings (certainly not for front toe!), yet that's what you aim for when setting up geometry.
However it's all merely academic I suppose and doesn't actually effect the way you do your job (very well by all accounts). You get cars set up bang in the middle of the specified range and even side-to-side rather than being happy as long as the settings are somewhere within the manufacturers tolerance, which is admirable pride in your work. But the specified range is just an allowed tolerance of static settings, and the machines dont pointlessly display the whole range of the vehicles suspension/steering travel. This might explain why you are most probably fobbed off when you "argue this fact directly with the manufacterers".
Liam