Fault tree analysis, the most widely used safety analysis technique in industry, is often applied manually. Although techniques such as cutset analysis or probabilistic analysis can be applied on the fault tree to derive further insights, they are inadequate in locating flaws when failure modes in fault tree nodes are incorrectly identified or when causal relationships among failure modes are i...

We present a disambiguation algorithm for weighted finite tree automata (FTA). This algorithm converts ambiguous FTA into equivalent non-ambiguous one where no two accepting paths labeled with the same tree exists. The notion of non-ambiguity is similar to that of determinism in the automata theory, but we show that disambiguation is applicable to the wider class of weighted automata than deter...

Risk management play an important role on preventing failures of any enterprise as it ensures effective planning and control. Not managing such including political, geographical, project, environmental, monetary, human, supply chain risks the enterprises cause irreparable results. Therefore, there is a need for comprehensive risk assessment approach regarding qualitative quantitative factors. T...

Fault Tree (FT) analysis is not only the most common technique used in engineering practice for estimation of system reliability, but also a key tool shared between designers, analysts, and regulators safe operation licensing purposes. In spite its long lasting success, traditional FT presents significant limitations modeling wide range features frequently encountered modern systems. The critic...

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