the range for certification of OPC product to meet the increasing demand for reliable functionality and insured interoperability. The self-certification using the ComplianceTestTool (CTT) and the participation at an Interoperability Workshop (IOP) are now enhanced with a Certification in an independent test facility. According to the test specification here not only the OPC Data Access (DA2/3) interface is tested but also the overall behavior of the product in a real world environment is verified. OPC Certification See also Object Linking and Embedding References External links OPC Foundation Automation organizations