Re: Oh dear ...
Well said. There's lots of comments further up making assumptions it hadn't been tested properly. It doesn't matter whether you go waterfall, agile, devops - there's always weird behaviours sneak through your testing every now and then. Doesn't matter who you are or how good you think you are.
All DevOps says is if you automate as much as you can you should reduce the risks and save time/money.