  Economic models of quality assurance can be an important tool for decision
makers in software development projects. They enable to base quality assurance
planning on economical factors of the product and the used defect-detection
techniques. A variety of such models has been proposed but many are too
abstract to be used in practice. Furthermore, even the more concrete models
lack an integration with existing software development process models to
increase their applicability. This paper describes an integration of a thorough
stochastic model of the economics of analytical quality assurance with the
systems development process model V-Modell XT. The integration is done in a
modular way by providing a new process module - a concept directly available in
the V-Modell XT for extension purposes - related to analytical quality
assurance. In particular, we describe the work products, roles, and activities
defined in our new process module and their effects on existing V-Modell XT
elements.
