Cases of QA in Lean software development...
This weekend my Twitter feed showed a series of great articles from Tom Gilb @TomGilb where he provided a set of really interesting examples of companies who moved towards Lean.
The examples include Google and how they work with Chrome. What I like about that example was the analysis of short- and long- term costs of low quality. Not monetary or resource costs, but branding costs, for example - variety of programming languages which make it hard to debug lead to winning grounds of languages like Python or Ruby.
Another case from Hanssen which he shows is a great example of how companies engage customers and shorten interations.
Following the link above opens up a lot of great material about QA.