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Interoperability testing
Definition

Testing to ensure compatibility with existing equipment or with other systems.

Comment

Interoperability testing is a superset of compatibility testing and integration testing. Interoperability testing requires that other systems and/or equipment are available for the testing phase. Should this equipment not be available then simulators (stubs and drivers) of the missing equipment should have been built and tested and then used to represent these other entities in the interoperability tests. It should be noted that these simulators will need to be assessed beforehand independently for their accuracy.