Research on reliability for gearbox shell production line fuzzy analytic hierarchy comprehensive evaluation

The author investigated two different enterprise gearbox shell production lines of producing same breed production. The article uses six months maintenance annals of two production lines which has run ten years to calculate dynamic reliability indexes: F(t), R(t), λ(t) and static reliability index, MTBF, MTTR, K, A, C. The static reliability index which gets across contrast analyzing two charts indicates: the rigid line reliability is better than the flexible one. Furthermore, it formats the basis of variables base on the static reliability index. Fuzzy hierarchy comprehensive evaluation model of gearbox shell production line is constructed by using fuzzy mathematics and AHP. This fuzzy analytic hierarchy model validates that the rigid line reliability is better than the flexible one. Lastly, the cause of different reliability of these two production lines is analyzed base on the enterprise fact. Keywords: Gearbox shell, Production line, Reliability, AHP, Fuzzy evaluation