Fault Tree Analysis is a commonly used technique for assessing the reliability and safety of engineering systems at the design stage but it is tedious and time-consuming to apply. A reconfigurable program is presented which utilizes a library of qualitative component models to enable fault tree type analyses of arbitrary hydraulic circuit configurations. It is applied to the analysis of failures of an experimental rig and a complex industrial system, and some features of its design and performance are discussed.

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,
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