A Novel Evaluation Model for Non-functional Requirements in Trustworthy Software

摘要

In order to measure Non-functional Requirements (NFRs) objectively and make a consensual evaluation for NFRs in Trustworthy Software (TS) considering different groups and different perspectives, this paper proposes an novel Evaluation Model based on Indirect Measurement and Consensual Evaluation (EMIMCE). Firstly the EMIMCE constructs an NFRs criteria decomposition hierarchy graph in the complex TS situation, proposes a method of indirect measurement based on the interrelation of NFRs inside the components, produces the relative quantity of NFRs, all these resolve the difficulties of calculating NFRs directly and build the measurement method with unified standard. Secondly by the intuitionistic fuzzy sets and three indices, an evaluation method is posed which is used to judge whether different groups have consensual evaluation for NFRs in technology and practices. At last, an example illustrates the feasibility and validity of the EMIMCE model.