试论可靠性维修性指标的阶段性

A DISCUSSION ON THE PHASED CHARACTER OF RELIABILITY AND MAINTAINABILITY INDEXES

介绍了国内外军、民机研制、生产、使用的不同阶段可靠性维修性(R&M)指标的实际增长情况及有关统计数据。又介绍了国外标准、规范、文件中有关寿命期不同阶段给出R&M指标(目标值、门限值)的规定。 在此基础上指出:产品性能在设计定型(或研制阶段)结束时能予充分显示,并可基本固化。但R&M仅能达到某一规定水平,还必须继续进行有计划的R&M增长以实现成熟期的最终目标。这是一种客观规律。对这种规律的认识将在规划、管理、技术等一系列决策中体现产品R&M分段控制、分段增长的思想。并将有力地促进产品寿命期最佳效能-费用目标的实现。

This paper firstly introduces the actual growth situation and related statistical data of reliability and maintainability(R&M) indexes of foreign and domestic combat or commercial aircraft during development,production and deployment phases.Then it introduces the requirement of specifying different R&M indexes(goal or threshold value) at different life cycle phase mentioned in foreign standards,regulations and documents.Based on these,this paper points out that the performance of product can be fixed at the end of full-scale development phase,but its R&M can only reach a certain level.In order to achieve the final target of the maturity phase,it must be continued to have a planned R&M growth.This is an objective law.The recognition of this law will reflect the idea of phased control and phased growth of product's R&M during the decision-making of planning,management and technology.It will also promote the implementation of optimum life cycle effectiveness-cost target.