Experience & data based synthetic evaluation method of system maintainability

It is difficult to evaluate the maintainability in design phase obviously. The system level and indicators selecting procedure are given in this paper, and the experience & data based synthetic evaluation method of system maintainability is structured to find out the key component and improving direction, providing a scientific and effective solution for maintainability evaluation. Subsequently, the method is applied in an amplifier system in its design phase. It helps designers to evaluate system´s maintainability more economically, and then direct maintainability design process scientifically, which plays more practical roles in the design phase.