[WJW]

Great point and sometimes checklists are indeed not enough. My previous post was triggered more by the "I think I did step 13," part of the post I was responding to. That is not a flaw with checklists but a flaw in the safety culture of the operator team. It should never happen that you lose track of where you are in the process because human memory is unreliable, rather you should fix that through better processes and outsource the memorizing to paper.