The NORMAP Methodology: Lightweight Engineering of Non-functional Requirements for Agile Processes

Agile software development methodologies, such as Scrum, have become very popular in quickly delivering quality Functional Requirements (FRs). However, agile methodologies have not sufficiently identified, modeled, and linked Non-Functional Requirements (NFRs) - such as security and performance - with FRs in early requirements phases. This research presents a lightweight engineering of NFRs for agile processes. The proposed Non-functional Requirements Modeling for Agile Processes (NORMAP) Methodology identifies, links, and models Agile Loose Cases (ALCs) with Agile Use Cases (AUCs) and Agile Choose Cases (ACCs). A lightweight adapted version of the NFR Framework was developed including 25 important NFRs. Further, a risk-driven agile requirements implementation sequence and a visual tree-like view were developed. The methodology was validated through developing a Java-based modeling simulation tool and two case studies.