The present document describes a methodology for automated interoperability testing for the validation of standards@ e.g. in the context of interoperability events and for the validation of products against standards. It extends and complements the best working practices presented in EG 202 237 [i.1] which targets the certification of products based on interoperability testing. The present document also proposes a generic framework for interoperability testing of distributed systems and includes guidance on@ for example@ access to reference points@ the establishment and maintenance of test synchronisation@ and the assignment of test verdicts.