Kaizen

Kaizen (改善, Japanese for "change for the better" or "improvement"; the English translation is "continuous improvement" or "continual improvement").
To be most effective Kaizen must operate with three principles in place:
consider the process and the results (not results-only);
systemic thinking of the whole process and not just that immediately in view (i.e. big picture, not solely the narrow view); and
a learning, non-judgmental, non-blaming (because blaming is wasteful) approach and intent.

From: http://en.wikipedia.org/wiki/Continuous_improvement