This clever scheme was brought to you by the bearded wonder from Simpler (you don't want to know how much Simpler are making out of all this). He also brought you the "Waterspider", and many others you wouldn't believe.
According to him, an aircraft move is a one man task (driving the tug) and takes less than a minute. Actually, the first time the idea came up he told us we should TAXI the aircraft from bay to bay. He also reckons that the reason not a single airline uses this system is because "RAF Lyneham are light years ahead of any airline".
It really is all very clever.
If you haven't already, check out this link for more details:
http://www.simpler.com/case-studies/...rshipLean.html
I particularly like the final line.