(idiomatic)The minimum number of personnel needed to operate and maintain an item at its most simple operating requirements, such as a ship or business, during an emergency or shut down, and at the same time, to keep vital functions operating.
noun
(idiomatic)
The minimum number of personnel needed to operate and maintain an item at its most simple operating requirements, such as a ship or business, during an emergency or shut down, and at the same time, to keep vital functions operating.
The minimal number of people keeping something operational.