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An Analysis Methodology for Probabilistic Specification and Execution Prediction for Improving of Reliability of Fault-Tolerant Real-Time Systems  

Lee, Chol (전북대학교 대학원 컴퓨터통계정보)
Lee, Moon-Kun (전북대학교 전자정보학과)
Abstract
The formal specification methods with probability have been demanded in the area of fault real-time systems, in order to specify the uncertainty that the systems can encounter during their execution due to various environmental factors. This paper presents a new formal method with probability. namely Probabilistic Abstract Timed Machine (PATM), in order to analyze and predict system's behavior in dynamical environmental changes, This method classifies the factors into two classes: the variable and the constant. The analysis of system's behavior is performed on the probabilistic reachability graph generated from the ATM specification for the system. The analysis can predict any possibility that the behavior may not satisfy some safety requirements of the system, indicate which variable factors cause such satisfaction, and further recover from this unsatisfying fault state by fixing the variable factors. Consequently the reliability to the fault real-time systems can be improved.
Keywords
Formal Method; Probability; PATM; reachability; prediction;
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Times Cited By KSCI : 1  (Citation Analysis)
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