TORA - Three Level Ordered Requirements Analysis

The paper proposes a three level schema to order the results of requirements analysis: social, socio-technical, and technical models. The proposal is derived and evolved from a methodology used in several interdis-ciplinary requirements analysis projects for various re-quirements areas, e.g. German Constitution, or social security goals in consideration of high damage potential. The three level schema maps to other current require-ments engineering methods. From that perspective the three levels seem to be a very useful scheme to order re-quirements analysis results and give some hints for inte-gration of non-functional requirements, analysis steps, and improvement of completeness.