在软件产品评价技术中，产品或服务满足规定需求或隐含需求的特征和特性的总和。注：在有合同的环境中，需求是在合同中规定的；而在其它环境中，则应对隐含需求进行验证和定义。

In software product evaluation, the totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs. Note: In a contractual environment, needs are specified, whereas in other environments, implied needs should be identified and defined.