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Occupancy states
What are the three occupancy states for cleanrooms?
As-built
Condition where the cleanroom or clean zone is complete with all services connected and functioning but with no equipment, furniture, materials or personnel present.
At-rest
Condition where the cleanroom or clean zone is complete with equipment installed and operating in a manner agreed upon, but with no personnel present.
Operational
Agreed condition where the cleanroom or clean zone is functioning in the specified manner, with equipment operating and with the specified number of personnel present.