Did you purposefully introduce this bug? Then it was your fault. Otherwise, from all the evidence we have, you couldn't predict it from where you were standing at the time. You can't be at fault for that.
Any other conclusion is a cultural problem that hints at a "shoot the messenger" philosophy ruling.
If we want a Westrum generative culture (and we do!) we can't go around assigning fault to ourselves or others when we end up in bad situations.
Focus on whether the process is good or bad, not where individuals ended up due to random variance around the mean.
End rant. Sorry, this is one of the major things that upset me about how other people run their organisations.
Any other conclusion is a cultural problem that hints at a "shoot the messenger" philosophy ruling.
If we want a Westrum generative culture (and we do!) we can't go around assigning fault to ourselves or others when we end up in bad situations.
Focus on whether the process is good or bad, not where individuals ended up due to random variance around the mean.
End rant. Sorry, this is one of the major things that upset me about how other people run their organisations.