Abstract: The research produces new concepts of subjective reliability and its comparison.It is concerned with the nature and characteristics of subjective reliability, series-parallel systems individually and their relationships with Fuzzy Set of Type Ⅱ.^[1][2][3][4] It lays down a preliminery foundation for subjective reliability.

Key words: subjective reliability, characteristics of subjective reliability, series-parallel systems, comparison of subjective reliability

摘要： 提出了主观可靠性和主观可靠性比较等概念.研究了主观可靠性特征、性质、串并系统以及它们与Ⅱ型Fuzzy集的联系.奠定了主观可靠性理论的初步基础.它在社会系统和人的行为起主导作用的工程系统中的可应用性是显而易见的.

关键词: 主观可靠性, 主观可靠性特征, 串并系统, 主观可靠性的比较