Microsoft Tests its software on an industrial scale.
A while ago I posted this already but the link got lost. So here is the link again.
read this article to see how Microsofts tests whidbey.
Some key points :
- 105,000 Test Cases
- 505,000 Test Scenario's
- 1.4 testers for every 1 developer
On the bottom of the article there is a very nice link of how MS handles bugs etc.
I also think this is why MS will always have an advantage over open source stuff.... The open source stuff just doesn't have these test facillities.....