To be sure, checklists must not become ossified mandates that hinder rather than help. Even the simplest requires frequent revisitation and ongoing refinement. Airline manufacturers put a publication date on all their checklists, and there is a reason why—they are expected to change with time. In the end, a checklist is only an aid. If it doesn’t aid, it’s not right. But if it does, we must be ready to embrace the possibility.
