Use whenever something needs the operator. That is a decision that is theirs, an action only they can take, a confirmation, an approval, or a ruling on a register row. A confirmation or an approval covers a scope change, a waiver, a forced transition, a lesson, a feedback row, the `go_no_go` header field, an unlock. Use it before building any slate, question, option list or recommendation for them. Also use before relying on an answer they gave earlier.
