避免主观因素，对投入产出指标进行综合评价，通过投影分析，得到最优投入指标(Avoid the subjective factor, the evaluation efficiency)

设置最大拟合误差和拟合模型实现对一组数据的拟合，克服了人工分段造成的主观误差(The maximum fitting error and fitting model are set up to fit a set of data, and the subjective error caused by artificial segmentation is overcome.)