Checking of design output is the lowest common denominator of design quality control, and as DPIC has noted, one where all too often we fail. Checking seeks to find mistakes, not prevent them; much less eradicate cultures that tolerate mistakes.
In the last three decades, I have had a lot of experience building checklist systems. This experience has been instructive. Here are the key lessons from it, which I hope will be useful to readers who are engaged in producing firm checklists: