Alistair , you & many other methodologists are having this people first approach. these are the same people who are responsible for cost & schedule over - runs , whether developer , owner , users , project managers etc. how people first approach will elviate all these evils ?
That's the wrong question. The question is, "what are the choices?" The answers include: (1) trust to a process, and the people mistakes will vanish (2) put the people up front, and they get to make their own mistakes Neither makes the mistakes vanish