Another incident to prove importance of acceptance criteria

McAfee had a goof-up.

As soon as anti-virus was updated (and generally auto-updated), an important system file was quarantined. Windows would shutdown every 60 seconds, and USB would not work.

Now, it is impossible to accept that this was not detected during the final QA, when checklist of all acceptance criteria for the product release was being ticked. Assuming, there was a checklist, that is!

Lesson to learn: Product Managers, be ready with your constraints and acceptance criteria for a product release, and work through it with the engineering team. Follow "stop the line" principle from lean techniques.