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IDT Open Seminar - Predictability and Evolution in Resilient Systems


Ivica Crnkovic , Ivica Crnkovic



Start time:

2012-02-23 14:15

End time:

2012-02-23 15:15



Contact person:


In the last decade the importance of resilience as an intrinsic system attribute is arising in every domain of system and software development. Resilience is an attribute often related to robustness, and survivability (and by this dependability) from one side, and sustainability from other side. Robustness and dependability are the important properties of many systems. Such systems are traditionally analyzed and designed in a top-down manner by defining the system boundaries, requirements and the system specifications With a goal to achieve predictable behavior in predictable (though not necessary known) situations. The main challenges in these types of systems occur due To unforeseen events. For this reasons one important element of the quality assurance process is to ensure that such events do not happen, or the probability they can happen is minimized. The sustainability attribute on The other hand is the capacity to endure, related to resource constraints and maintenance of status quo of the external environment (i.e low negative Impact in short and long terms). These characteristics are complementary and not necessary compatible, likely to require trade-off analysis to find a satisfactory balance.The modern paradigm of software development includes (re)use and possible adaptation of the existing software, either in a form of components, services, underlying platforms and infrastructure, or even complete Software systems. The efficient development requires not only efficient mechanism For composition of functional properties, but also extrafunctional properties. In the concrete case, we can sate a question: Can we, and under which assumptions, reason about resilience composition? This talk will present different types of extrafuctional properties with respect to their compositions and Composition assumptions. A complementary approach to composability is a top-down approach – analysis of a system in respect to resilience. Since resilience is a Complex property, it depends on a number of subproperties that may be easier Analyzed and in some cases measured. The question is which are these subproperties.In this talk we shall present a method and a model for analyzing software evolvability, one of the subcharacteristics of resilience

Ivica Crnkovic,