This thesis is focused on problematics of software quality management and performance testing. Using design science research (DSR) methodology an artefact was developed. The artefact is a methodology which is focusing on helping software development teams introduce performance testing as an additional mechanism of software quality management process. Developed methodology is composed of three key components which support each another. Component “Processes of methodology” are leading the implementers on a path all the way to an evaluation of results of performance tests. Outputs of key processes are “Documents of methodology” (second component) which are tasked with recording crucial information not only for later to be used as inputs to nex...