Specifies the requirements and gives advice for the production of system-independent conformance test suites for one or more Open Systems Interconnection (OSI) specifications. Applies, especially to the production of all OSI conformance testing specifications. Applies to the production of abstract test cases which check the conformance of an implementation to the relevant static and/or dynamic conformance requirements by controlling and observing protocol behaviour. Applies to the production of test suites for testing implementations of one or more adjacent protocols.