The goal of software engineering is to achieve high-quality software in a cost-effective, timely, and reproducible manner. Advances in technology offer reductions in cost and schedule, but their effect on software quality often remains unknown. The International Conferenceon the Quality of Software Architectures(QoSA 2005)focusedon software architectures and their relation to software quality, while the International Workshop on Software Quality (SOQUA 2005) mainly focused on quality assurance and more precisely on software testing. These events complement each other in their view on software quality. One of the main motivations for explicitly modelling software architectures is to enable reasoning on software quality. From a software engineering perspective, a so- ware architecture not only depicts the coarse-grained structure of a program, but also includes additional information such as the program s dynamics (i. e. , the ?ows of c- trol through the system) and the mapping of its components and connections to e- cution environments (such as hardware processors, virtual machines, network conn- tions, and the like). In this area, QoSA 2005is concernedwith researchand experiences that investigate the in?uence a speci?c software architecturehas on software quality - pects. Additionally,the developmentof methodsto evaluate software architectureswith respect to these quality attributes is considered to be an important topic. The quality - tributes of interest include external properties, such as reliability and ef?ciency, as well as internal properties, such as maintainability.

Inhalt
Keynotes.- Reexamining the Role of Interactions in Software Architecture.- Are Successful Test Cases Useless or Not?.- QoSA Long Papers.- DoSAM Domain-Specific Software Architecture Comparison Model.- An Architecture-Centric Approach for Producing Quality Systems.- A Model-Oriented Framework for Runtime Monitoring of Nonfunctional Properties.- Predicting Mean Service Execution Times of Software Components Based on Markov Models.- An XML-Based Language to Support Performance and Reliability Modeling and Analysis in Software Architectures.- Formal Definition of Metrics Upon the CORBA Component Model.- The Architect's Dilemma Will Reference Architectures Help?.- Architectural Reuse in Software Systems In-house Integration and Merge Experiences from Industry.- Supporting Security Sensitive Architecture Design.- Exploring Quality Attributes Using Architectural Prototyping.- On the Estimation of Software Reliability of Component-Based Dependable Distributed Systems.- Empirical Evaluation of Model-Based Performance Prediction Methods in Software Development.- SOQUA Long Papers.- Automatic Test Generation for N-Way Combinatorial Testing.- Automated Generation and Evaluation of Dataflow-Based Test Data for Object-Oriented Software.- Automated Model-Based Testing of ? Simulation Models with TorX.- Jartege: A Tool for Random Generation of Unit Tests for Java Classes.- FlexTest: An Aspect-Oriented Framework for Unit Testing.- Quality Assurance in Performance: Evaluating Mono Benchmark Results.