Mission Targets Oriented Quantitative Quality Assurance of Space Parts: To Estimate the Reliability Quantitatively and Cost-effectively

SUMMARY & CONCLUSIONSBegin with the discussion of the quality class-oriented testin reliability leading to the deficiencies of traditional assurance, then the concept and approach of quantitative assurance is introduced. The essence of quantitative assurance is mission target oriented and establishment of the relations, of cause, after the quantitative relation between mission targets and the parts reliability is established, the quantitative relation between reliability, quality assurance level (QAL) and the cost can be built so the cost effectiveness of quality assurance (QA) can be assessed. The approach of quantitative assurance and how to make it work are discussed in detail in this paper, and the prototype of it and the application in China space science mission are also presented. The approach of quantitative assurance is still in development and it can be improved with new ideas and approaches, based on the core elements: ① mission targets oriented, ② to build quantitative relation between reliability, QAL and cost, ③ physical and data analysis techniques and methods to assess reliability, ④ joint work of mission designer, equipment engineer and parts engineer.