Study on trimming priority based on system functional model

To determine the reasonable trimming component in the system functional model,a trimming priority identifying method was proposed based on the properties of components in the functional model.From the aspects of improving the level of ideal system and reducing the difficulty of searching solutions,influencing factors for identifying trimming priority were proposed.Based on the system functional model,the components' relevant attributes were extracted to compute evaluation value of the index.The weight coefficient of each index was determined with the method of maximum deviation and entropy to optimize the evaluation results.On this basis,the trimming process model was established to provide a feasible way to identify reasonable trimming component for trimming.The effectiveness of the method was revealed by improved design of water dispenser using the trimming process model.