Goal-oriented requirements analysis techniques provide ways to refine organizational and technical objectives, to more effectively explore alternatives during requirements definition. After selecting a set of alternatives to achieve these objectives, you can elaborate on them during subsequent phases to make them more precise and complete.
Citation:
John Mylopoulos, Lawrence Chung, Stephen Liao, Huaiqing Wang, Eric Yu, "Exploring Alternatives During Requirements Analysis," IEEE Software, vol. 18, no. 1, pp. 92-96, Jan./Feb. 2001, doi:10.1109/52.903174