So, the real key is leadership and involvement of people?
As Howste points out, there are 8 principles of quality management that the Standard uses as a foundation (I just referred to 2 of them):
- Customer focus
- Leadership
- Involvement of people at all levels
- A process approach
- Continual improvement
- A systems approach to management
- A factual approach to decision making
- Mutually beneficial supplier relationships
All of them are important (with the possible exception of the last, if procurement/purchasing is not important in your organisation). For example, as Andy has pointed out, a factual approach to decision making is one of the important principles. As a consultant, I remain fascinated at how often, in some organisations I consult to, I find that decisions are made without any real facts/data as the basis! (And after implementing ISO 9001, when the proverbial penny drops, the more intelligent managers are often struck by the same thing).
But the 'principles' (think of them as guiding concepts, if you will) are not the same thing as the actual requirements of the Standard.
Having your system documented is one of the mandatory requirements (must do's) of ISO 9001. In my opinion, it's a requirement because it is a way of acting on some of those principles, and helps achieve the intent.