[analog31]

In the laser business, the latter is called "wall plug efficiency," which is laser power out per electrical power in.

[westurner]

"Uptime Percentage", "Operational Availability" (OA), "Duty Cycle"

Availability (reliability engineering) https://en.wikipedia.org/wiki/Availability

Terms from other types of work: kilowatt/hour (kWh), Weight per rep, number of reps, Total Time Under Tension