Providers of external system services to the manufacturer through a variety of consumer-producer relationships including but not limited to: joint ventures; business partnerships; outsourcing arrangements (i.e., through contracts, interagency agreements, lines of business arrangements); licensing agreements; and/or supply chain exchanges. Supporting services include, for example, Telecommunications, engineering services, power, water, software, tech support, and security.
Sources:
NISTIR 8183
NISTIR 8183 Rev. 1
NISTIR 8183A Vol. 1
NISTIR 8183A Vol. 2
NISTIR 8183A Vol. 3