Complex System Reliability Allocation Based on Fuzzy Decision Method

For the complex system, there are many influencing factors of the reliability, and apart of the factors can only be assessed qualitatively. Furthermore, the complex system is composed by different type sub-systems. So it is difficult to allocate the reliability of system to every subsystem by traditional reliability allocation method. So, a new reliability allocation method which based on the fuzzy decision is proposed. The basic idea and the steps are introduced. And the formula for calculating the reliability of sub-system is defined. At last, an example is calculated by this method. It is proved that the result is accord with the principles of reliability allocation completely.