By Simona Bernardi, José Merseguer, Dorina Corina Petriu
Over the final twenty years, an enormous problem for researchers engaged on modeling and assessment of computer-based structures has been the evaluation of process Non useful houses (NFP) corresponding to functionality, scalability, dependability and security.
In this publication, the authors current state-of-the-art model-driven suggestions for modeling and research of software program dependability. so much of them are in accordance with using UML as software program specification language. From the software program method specification viewpoint, such recommendations take advantage of the traditional extension mechanisms of UML (i.e., UML profiling). UML profiles let software program engineers so as to add non-functional homes to the software program version, as well as the practical ones. The authors aspect the cutting-edge on UML profile proposals for dependability specification and carefully describe the trade-off they accomplish. the point of interest is principally on RAMS (reliability, availability, maintainability and security) houses. one of the current profiles, they emphasize the DAM (Dependability research and Modeling) profile, which makes an attempt to unify, below a typical umbrella, the former UML profiles from literature, supplying features for dependability specification and research. moreover, they describe fashionable model-to-model transformation innovations, which help the new release of the research version and make allowance for additional overview of other RAMS homes. Case reviews from assorted domain names also are awarded, so one can supply practitioners with examples of the way to use the aforementioned techniques.
Researchers and scholars will examine simple dependability ideas and the way to version them utilizing UML and its extensions. they'll additionally achieve insights into dependability research strategies by utilizing acceptable modeling formalisms in addition to of model-to-model transformation thoughts for deriving dependability research versions from UML requisites. furthermore, software program practitioners will discover a unified framework for the specification of dependability requisites and houses of UML, and may enjoy the specific case studies.
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Additional info for Model-Driven Dependability Assessment of Software Systems
C Software complexity measures. DR Dependability requirements BOUNDUpper/lower bound requirements on dependability measures. t. the system behavior. DT Dependability threats (Fault) FP Fault persistence. FO Fault occurrence. Other Fault classifications: hw/sw, development/operational faults. FB Faulty behavior of components, connectors, services. FOQ Fault occurrence quantitative characterization. DT Dependability threats (Error) EB Erroneous behavior (error states). EQ Error quantitative characterization.
3. , network bandwidth) that have an impact on the communication delays. 1 Unified Modeling Language 33 Fig. 8 Package Diagrams Packages allow developers to organize large UML models in order to reduce their complexity, to separate domains, and to enforce a cleaner structure. A package is a design-time model element that may contain lower-level packages, as well as other UML model elements (such as classes, but also use cases, sequence diagrams). Packages cannot be instantiated. An important characteristic is that packages define namespaces.
System components are composites that can consist of software or hardware components, as well as of other systems. AADL includes semantics for data exchange and runtime control, such as message and event passing, synchronized access to shared components, thread scheduling protocols, timing requirements, remote procedure calls. AADL components interact exclusively through defined interfaces. 2 Domain-Specific Language: AADL 37 event data ports for queued message data, event ports for asynchronous events, synchronous subprogram calls, and explicit access to data components.
Model-Driven Dependability Assessment of Software Systems by Simona Bernardi, José Merseguer, Dorina Corina Petriu