Just restating: Traceable errors get corrected, untraceable errors don't, and so over time the errors affecting you inevitably are comprised nearly entirely of

Just restating: Traceable errors get corrected, untraceable errors don't, and so over time the errors affecting you inevitably are comprised nearly entirely of accumulated untraceable issues. It means you need judgement-based management to be able to over-ride metric-based decisions, at times.