After power-down, the system reboots, and the process needs to restart. All in-progress activity is lost. There's no suspend; There's no hibernate. There's no "modern standby."

There's "The system was powered off, soooo... we're going to let the glass furnace cool down, and in a few hours when it's sufficiently cool and everything else in the plant is ready, we're going to start up the process again."

Needless to say, this isn't the sort of behavior that'll pass the HLKs.