What is "interoperation"

n. (context engineering English) The interaction and simultaneous functioning of multiple products having multiple architectures etc

In engineering, interoperation is the setup of ad hoc components and methods to make two or more systems work together as a combined system with some partial functionality during a certain time, possibly requiring human supervision to perform necessary adjustments and corrections.

This contrasts to interoperability, which theoretically permits any number of systems compliant to a given standard to work together a long time smoothly and unattended as a combined system with the full functionality by the standard.

Another definition of interoperation: "services effectively combining multiple resources and domains...; requires interoperability".