[ProtectOurFreedom]

I did field engineering work on boilers and power plants for five years. We never buttoned anything up until we knew it was all shipshape. We especially accounted for all personnel.

[JoeFromSidney]

One summer between college years I worked on the brick layers gang in a steel mill. We'd periodically rebuild the blast furnaces. There was a strict check-in, check-out procedure. We didn't want to inadvertently leave someone behind when the job was done.