Much of this, I believe, is relevant to the delivery of Radiology services, and the Bristish National Health Service is now interested in it too. The NHS institute has a section on its website on Lean Thinking, which has links to a lot of useful and interesting stuff.
However, an article in the Economist (19 Dec 2007) shows another aspect of working at Toyota. The company may be hyper-efficient, but employees in Japan put in enormous amounts of unpaid overtime. In 2002, A 30 year old Toyota quality control manager collapsed and died at work at 4 am. He had been doing 80 hours of unpaid overtime work per month in the 6 months prior to his death much of which was "voluntary" and unpaid. Last month, a court accepted his wife's claim that his death was due to overwork.