Gematik Gesellschaft für Telematikanwendungen der Gesundheitskarte

Interoperability issues between different implementations in large-scale systems is one of the major reasons for increased effort during system test. This paper addresses this problem in the context of the Online Certificate Status Protocol (OCSP) in a Public Key Infrastructure (PKI), which is part of the certificate verification process of many components. The high interconnection of OCSP clients and server increases the complexity of system tests to ensure interoperation. This paper provides a component based testing method for clients and servers using OCSP exemplified by testing PKI components of a nationwide IT infrastructure. The method ensures high interoperability requirements of large-scale infrastructures during component tests and reduces efforts for test execution.

This report details the experience made using BPMN as the process modeling notation for a large-scale modeling effort that formed the heart of a business transformation project. It illustrates the practical limitations encountered in using BPMN and how they were overcome by using UML to extend BPMN. The automated document generation approach used to generate user-friendly process documentation from the BPMN model and the instruments used to drive the business transformation project forward are explained.