every failure is a success
Tony Buzan

We are taught to avoid mistakes and only success is rewarded. Still the child that is learning to ride a bike, makes mistakes and uses these to learn from. It it were punished every time it made the mistake, few children would ride bikes or enjoy it. Creativity is very much helped by mistakes; in fact it methodically uses them, which can be fun. This is the process part, don't tell others about them! Radar was originally designed to 'shoot' planes down. Who cares? They just told nobody about the mistakes, but used it to come up with something new. Remember mistakes only are fun in the inventive search process part. You're not supposed to advertise them.

Creativity is allowing yourself to make mistakes. Art is knowing which ones to keep.
Scott Adams (1957 - ), 'The Dilbert Principle'

Allow for mistakes and use these methodically to find out why it went wrong. So create your own feedback system, within which you can work, explore, invent and make mistakes.
The next stage is that of verification, in exploration we need to forget about that, since we shall then only look for the 'acceptable' manners. And new ideas are hardly 'acceptable' or conventional. Working on this part makes you very vulnerable so do it only in a safe environment with people whom you can trust. In business they have created 'intrapreneurship' to make this possible. A group of people is given the means and facilities to work on a particular project and do not report until an agreed time. Then the results are presented and who cares about the mistakes made as long as the product is good?