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Information and automated production systems are long-living, evolvable systems. Consequently, modifications are performed to correct, improve or adapt the respective system. We introduce different approaches to analyze maintainability of software-intensive systems and propose two different case studies from the information and from the automated production systems domain as a basis to validate approaches...
Component-based software engineering (CBSE) poses challenges for predicting and evaluating software performance but also offers several advantages. Software performance engineering can benefit from CBSE ideas and concepts. The MediaStore, a fictional system, demonstrates how to achieve compositional reasoning about software performance.
Modern service-oriented systems have increasingly complex loosely-coupled architectures that often exhibit poor performance and resource efficiency and have high operating costs. This is due to the inability to predict at run-time the effect of dynamic changes in the system environment (e.g., varying service workloads) and adapt the system configuration accordingly. In this paper, we describe a long-term...
To analyse runtime behaviour and performance of software systems, accurate time measurements are obtained using timer methods. The underlying hardware timers and counters are read and processed by several software layers, which introduce overhead and delays that impact accuracy and statistical validity of fine-granular measurements. To understand and to control these impacts, the resulting accuracy...
The difficulty in evolving service-oriented architectures with extra-functional requirements seriously hinders the spread of this paradigm in critical application domains. This work tries to offset this disadvantage by introducing a design-time quality impact prediction and trade-off analysis method, which allows software engineers to predict the extra-functional consequences of alternative design...
Efforts for software evolution supersede any other part of the software life cycle. Technological decisions have a major impact on the maintainability, but are not well reflected by existing code or architecture based metrics. The way the persistency of object structures with relational databases is solved affects the maintainability of the overall system. Besides maintainability other quality attributes...
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