Initial software quality requirements tend to be imprecise, subjective, idealistic, and context-specific. An extended characterization of the common Softgoal concept is proposed for representing and reasoning about such requirements during the early stages of the requirements engineering process. The types of information often implicitly contained in a Softgoal instance are highlighted to allow richer requirements to be obtained. On the basis of the revisited conceptual foundations, guidelines are suggested as to the techniques that need to be present in requirements modeling approaches that aim to employ the given Softgoal conceptualization.
Jureta, I.J., Faulkner, S. and Schobbens, P.Y., 2006, November. A more expressive softgoal conceptualization for quality requirements analysis. In International Conference on Conceptual Modeling (pp. 281-295). Springer, Berlin, Heidelberg.