Challenges in validating safety critical embedded systems

Furthermore, we provide a clear terminology for concepts within the testing context. Model-based testing relies on the use of behavior models to automatically generate sequences of inputs and expected outputs.These sequences can be used as test cases to the end of both validating the model and also verifying an actual system.Among others, these include search strategies more powerful than backtracking alone, appropriate (graphical) input languages for test cases, and theoretical aspects such as the relationship between test cases (traces) and system specifications. This paper presents Hy ROOM, a proposal for an extension of UML-like languages by continuous activities for the specification of mixed discrete-continuous, or hybrid, systems.It is implemented in a CASE tool prototype based on the Real-time Object Oriented Modeling methodology.In the automotive domain many systems are reactive and e ..." Model-based testing relies on the use of behavior models to automatically generate sequences of inputs and expected outputs.In the automotive domain many systems are reactive and exhibit continuous as well as discrete dynamics. Test case generation for concurrent reactive systems on the grounds of symbolic execution basically amounts to searching their state space.As in the case of model checkers, di#erent search strategies (depth-first, breadth-first, best-first, tabu) together with di#erent strategies for storing vis ..." Test case generation for concurrent reactive systems on the grounds of symbolic execution basically amounts to searching their state space.

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In our view notations such ashybrid automata can bene cially be used for requirements capture and the early design steps of hybrid, embedded systems =-=[10]-=-.All vital parts ..." This paper presents Hy ROOM, a proposal for an extension of UML-like languages by continuous activities for the specification of mixed discrete-continuous, or hybrid, systems.All vital parts Citation Context ..and continuous notations would require a partitioning into discrete, continuous, and remaining hybrid subsystems that is not adequate in early development phases where abstract models are desired =-=[PSS00]-=-.Although many of the standards are tailored to meet the needs of specific industries, they all require similar development processes be applied in order to demonstrate compliance.At the same time, these functional safety standards introduce a number of challenges for engineers and organizations developing these safety critical electronic components.

Challenges in validating safety critical embedded systems