Requirements elicitation using goal-based organizational model

Domain knowledge is crucial for the quality of requirements. The systems analysts, who have adequate knowledge of software often don't understand the organizational context well. The Tropos methodology proposes a set of concepts, which are effective in capturing the organizational context, the interactions between the software system and the human agents. Based on the Tropos methodology, Software System-Business Model (SS-BM), which integrates the Software System Actor (SSA) from early requirements organizational model has been proposed. In this paper, a methodological approach of applying the SS-BM to requirements list elicitation is presented. In the proposed method, requirements items were mapped to SS-BM elements based on their semantic meanings. The mapped requirements list and SS-BM were analyzed in a specific sequence according to multiple checking points. The problems of requirements list were identified in the analysis process. For each kind of problem identified a possible improvement is proposed. Quality indicators were used to summarize the quality of requirements at the end of the elicitation process.