Abstract-Context. Requirements elicitation is a highly communicative activity in which human interactions play a critical role. A number of analyst characteristics or skills may influence elicitation process effectiveness. Aim. Study the influence of analyst problem domain knowledge on elicitation effectiveness. Method. We executed a controlled experiment with post-graduate students. The experimental task was to elicit requirements using open interview and consolidate the elicited information immediately afterwards. We used four different problem domains about which students had different levels of knowledge. Two tasks were used in the experiment, whereas the other two were used in an internal replication of the experiment; that is, we repeated the experiment with the same subjects but with different domains. Results. Analyst problem domain knowledge has a small but statistically significant effect on the effectiveness of the requirements elicitation activity. The interviewee has a big positive and significant influence, as does general training in requirements activities and interview experience. Conclusion. During early contacts with the customer, a key factor is the interviewee; however, training in tasks related to requirements elicitation and knowledge of the problem domain helps requirements analysts to be more effective.
1INTRODUCTIONR EQUIREMENTS elicitation, that is, seeking, capturing and consolidating requirements, is a core activity of any requirements engineering process [1] and has a direct influence on software quality [2]. Requirements elicitation depends on intensive communication between users and analysts in order to gather the right information [3]. Human interactions play an important role in this context. On one hand, customers should be able to interact and communicate their needs to analysts. On the other hand, analysts should be able to draw out and grasp the necessary domain information from customers.The effectiveness of requirements engineering activities is believed to partially depend on the participating individuals [4]. It has been observed that interview effectiveness can vary significantly depending on interviewer skills, probably because proficiency affects the course of the questioning [5]. As a result, elicitation strongly depends on the individual doing the interviewing [6]. Similar effects have been identified in brain-storming [4] and using other elicitation techniques [7].Several personal attributes may have a bearing on the effectiveness of any requirements-related task: experience [8]