This work developed an automatic approach for the assessment of software reliability which is both theoretical sound and practical. The developed approach extends and combines theoretical sound approaches in a novel manner to systematically reduce the overhead of reliability assessment.

Diese Arbeit stellt neuartige Konzepte zur effizienten Entscheidungsunterstützung in der Rekonfiguration software-intensiver technischer Systeme mit limitiertem Wartungszugriff vor. Entgegen rein redundanzorientierter Ansätze, basiert die verfolgte Methodik auf der prädiktiven Vorausberechnung adäquater Konfigurationsalternativen im relevanten Lösungsraum. Das Wissen über Konfigurationsbeziehung wird frühzeitig manifestiert und zur autarken kosteneffizienten Abwägung der Alternativen eingesetzt. This work presents novel concepts for efficient decision support in reconfiguring...

This work introduces a novel approach to keep high-level component-based architecture models consistent with source code during software development and software evolution. The approach helps to avoid architecture drift and architecture erosion, which are two well-known problems that can arise during development and maintenance of a software system. In particular, the presented approach can be used to keep instances of the Palladio Component Model (PCM) consistent with Java source code.

In software development, components are increasingly being reused, especially for the implementation of standard functionalities making software development more cost-efficient. At design time, however, it is often unclear which solution providing these functionalities fits the requirements of the software system. This work proposes a method and tool enabling software architects to automatically evaluate the effects on the quality attributes of software architectures when reusing features.

A main property of software-intensive technical systems is sustainability. Sustainable systems need to change continuously. A change to a system element can result in further changes to other system elements. If these elements originate from different domains, the change can also propagate between several domains. This book presents an architecture-based approach to change propagation analysis of software-intensive technical systems that considers heterogeneous elements from different domain.

To understand the problems in metamodeling, this work presents an investigation of bad smells in metamodels. The core contribution of this work is the reference structure. It enables design, evolution, and extension of metamodels for modeling languages used for quality analysis. Applying the reference structure yields a modular metamodel. To be able to couple the metamodel modules in a meaningful way, this book investigates metamodel extension mechanisms.