“…Then, a requirements engineering process for determining the set of valid requirements for a system can be considered a humanintensive interaction process. Furthermore, while an extensive research (Beckworth & Garner, 1994;El-Eman & Madhavjin, 1995;Nikula, Fajaniemi, & Kalviainen, 2000;Juristo, Moreno, & Silva, 2002;Neil & Laplante, 2003) has been conducted on process, techniques, and their real utilization in organizations, few studies have been focused in classifying requirements and the findings show overlaps, omissions, and mixed interpretations. Then, for achieving the research purpose implicitly established in research question (a), we believe that a comprehensive and updated requirements classification is needed.…”