The failure checklists actually prevent
A crew that has done the same install two hundred times will occasionally miss a step — not because they do not know it, but because familiarity removes the conscious check.
Checklists target that specific failure. They are poor tools for problems that require thinking and excellent tools for problems that require remembering.
What makes a checklist usable
- Five to nine items, not thirty.
- Each item is verifiable, not aspirational.
- It is completed at the point of work, not reconstructed later.
- It fits the format people actually have to hand — usually a phone.
The compliance trap
A checklist filled in at the end of the day from memory provides documentation without providing safety. It records what someone believes happened.
If a checklist is only ever completed retroactively, that is a signal the format or the timing is wrong.