Do you keep an engineering log for yourself? If not, then start one as that's the easiest way to review what the concerns of the day were back then, and to beg

Do you keep an engineering log for yourself? If not, then start one as that's the easiest way to review what the concerns of the day were back then, and to begin to see where having history starts paying dividends. Otherwise, something like the principle of https://en.m.wikipedia.org/wiki/Prudent_man_rule https://en.m.wikipedia.org/wiki/Prudent_man_rule -- ie. were you parachuted into this project, which decisions would need rationales?