参照美国军用标准MIL-STD-45662A《校准系统要求》和适航要求中对计量标准的选择原则,从适宜性和经济性两方面阐述了民机制造业中计量标准选择的4倍允差比关系,并举例说明了计量标准选择时允差比的内涵。研究结果表明,计量标准的允差小于等于被校对象允差的四分之一是民机制造业中计量标准选择时其适宜性和经济性的最佳结合点。 According to the American military standard MIL-STD-45662A “calibration system requirements” and airworthiness requirements in the measurement of the principle of selection criteria, from the two aspects of suitability and economy elaborated civil aircraft manufacturing industry standard selection of 4 times the allowable ratio Relationship, and gives an example to illustrate the connotation of the tolerance ratio when choosing the measurement standard. The results show that the tolerance of the measurement standard is less than or equal to one-fourth of the tolerance of the measured object is the best combination point of suitability and economy when selecting the measurement standard in civil aircraft manufacturing industry.