GIS reliability analysis based trapezoid fuzzy fault tree

GIS reliability refers to the ability to complete the requirements under the specified conditions and time. In this paper, there are five elements including object, conditions of use, use of time, functions and capabilities, to evaluate GIS reliability proposed by the combination in a engineering GIS. The paper imported trapezoid fuzzy fault tree into GIS reliability analysis for the fist time. The paper discussed how GIS reliability analysis uses trapezoid fuzzy fault tree method, mainly researches two problems that are GIS trapezoid fuzzy fault tree establishing and analysis step of GIS trapezoid fuzzy fault tree; uses example to adopt trapezoid fuzzy fault tree method computing GIS reliability analysis; because the technique considers not only GIS random uncertainty but also GIS fuzzy uncertainty, the result is precise, scientific and reasonable; finally summarizes up and points out the problems to need solving.