Decision tree - The most picturesque of all the allegedly scientific aids to making decisions. The analyst charts all the possible outcomes of differ… - Robert Heller

Two of my favourite current management writers are Americans – Clayton Christensen and Peter Senge. My all-time favourite gurus are Peter Drucker, who became a greatly admired friend, and W. Edwards Deming. The thing that set these people apart from many other business commentators is that they didn’t propose any all - encompassing theories, they simply told it like it is. The fact is that life cannot be summarised as a simple set of rules; it’s far too complicated for that and it’s always changing. Unfortunately, all-encompassing panaceas do seem to be popular and certainly sell books, which is why I so value the objectivity of thought that each of these people brought to the debate.

My first book “The Naked Manager”, a big success in 1971, had been followed by many others, and I wanted to write still more. Writing books is very interesting as each new project takes you in a different direction. You learn a lot – especially about what you yourself really think.

All businesses operate below their true potential. That is unavoidable, given the fallibility of human beings.