Method, computer program and device for determining a dominant fuzzy fault tree for a technical system

摘要

Computer-implemented method (100) for testing a technical system, in particular software, hardware or an embedded system, in particular for determining the reliability of the technical system, the method comprising the following steps: Providing (110) a set of fuzzy fault trees (200) for the technical system, a respective fuzzy fault tree (200) comprising a fuzzy top event (210 and a plurality of fuzzy base events (220) and the fuzzy Fault trees (200) differ from one another by fuzzy membership functions of the fuzzy basis events (220); arranging (120) the fuzzy fault trees (200) in a cellular structure (400) comprising horizontally and vertically arranged cells; initial assignment (130 ) a respective state value to a respective fuzzy fault tree (200) based on a reliability value of the respective fuzzy fault tree (200), the state value being zero or one; providing (140) collision rules, a collision rule of a cell of the cellular structure ( 400) assigning a new state value based on the state values of the horizontal and vertical neighboring cells, repeatedly applying (150) collision rules simultaneously, in parallel for all cells of the cellular structure (400) until there is only one fuzzy fault tree (200) with the state value one.