One of the emerging lesson from the use of the EasyWinWin approach is that
requirements negotiation appears to transform the nature of the
requirements towards a more precise expression of an agreed solution
to a requirement rather than agreement of the requirements
themselves. In i* terms, the requirements negotiation transform a goal
or a soft goal to a task or solution and introduces new means-end links
into a SR model.
This provides an important conclusion – that reaching agreement about
requirements as a result of negotiation also decomposes, refines and
explores potential solutions to satisfy the original requirements.
Reference: Neil Maiden (2011) Requirements Engineering Lecture Notes