arXiv subjects
Publications and source records attributed to Maria Spichkova.
This set of theories presents a formalisation in Isabelle/HOL+Isar of data dependencies between components. The approach allows to analyse system structure oriented towards efficient checking of system: it aims at elaborating for a concrete system, which parts of the system (or system model) are necessary to check a given property.
This set of theories presents an Isabelle/HOL+Isar formalisation of stream processing components introduces in Focus, a framework for formal specification and development of interactive systems. This is an extended and updated version of the formalisation, which was elaborated within the methodology 'Focus on Isabelle'. In addition, we also applied the formalisation on three case studies that cover different application areas: process control (Steam Boiler System), data transmission (FlexRay communication protocol), memory and processing components (Automotive-Gateway System).
An appropriate system model gives developers a better overview, and the ability to fix more inconsistencies more effectively and earlier in system development, reducing overall effort and cost. However, modelling assumes abstraction of several aspects of the system and its environment, and this abstraction should be not overlooked, but properly taken into account during later development phases. This is especially especially important for the cases of remote integration, testing/verification, and manufacturing of cyber-physical systems. For this reason we introduce a development methodology for cyber-physical systems (CPS) with a focus on the abstraction levels of the system representation, based on the idea of refinement-based development of complex, interactive systems.
This paper provides a brief introduction to the work that aims to apply the achievements within the area of engineering psychology to the area of formal methods, focusing on the specification phase of a system development process.
This paper presents the methodology for the system requirements and architecture w.r.t. their decomposition and refinement. It also introduces ideas of refinement layers and of refinement-based verification.
One of the common problems of system development projects is that the system documentation is often outdated and does not describe the latest version of the system. The situation is even more complicated if we are speaking not about a natural language description of the system, but about its formal specification. In this paper we discuss how the problem could be solved by updating the documentation automatically, by generating a new formal specification from the model if the model is frequently changed.
In many cases, it is more profitable to apply existing methodologies than to develop new ones. This holds, especially, for system development within the cyber-physical domain: until a certain abstraction level we can (re)use the methodologies for the software system development to benefit from the advantages of these techniques.
This short paper introduces a model for the specification and verification of real-time system design: timed state transition diagrams.
This work presents a model-based development methodology for verified software systems as well as a tool support for it: an applied AutoFocus tool chain and its basic principles emphasizing the verification of the system under development as well as the check mechanisms we used to raise the level of confidence in the correctness of the implementation of the automatic generators.