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In this paper, we extend models for the test phase and the operational phase with cost aspects, to explore cost optimality in testing and rejuvenating software systems that can age. For example, we find that under limited resources it may be advisable not to focus on the removal of aging-related bugs in the test phase, rather, the adverse affects of such bugs should primarily be prevented via software...
The ban of lead in consumer-based electronics by many countries has resulted in a dramatic reduction in the availability of electronic components with tin-lead terminations. With the uncertainty associated with lead-free reliability and the issues associated with mixing lead-free solder with tin-lead solder, medical, defense, and aerospace equipment manufacturers are examining and in some cases implementing...
Distributed software systems are characterized by increasing autonomy. They often have the capability to sense the environment and react to it, discover the presence of other systems and take advantage of their services, adapt and re-configure themselves in accordance with the internal as well as the global state. Testing this kind of systems is challenging, and systematic and automated approaches...
Operators of complex systems, such as are found in aerospace, electric power networks, automated manufacturing, or the railways industry, impose ever more stringent availability performance constraints. At the same time, increasing attention is being paid to life-cycle cost (LCC). ALSTOM Transport Information Solutions' URBALIS automated mass transit system is confronted with this situation. This...
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