The objective,requirements and assumptions elicited from multiple concerns and viewpoints must be evaluated on several grounds. They might be formulated in terms of inconsistent terminologies or incompatible structures. Their formulation might be interpreted in inconsistent ways. Some of them might not be satisfiable when taken together under specific conditions. Some requirements or assumptions might be overexposed to different types of risks. Alternative options may arise during elicitation. In view of resource limitations, the requirements might not all be implementable in the first development cycle. All such problematic situations need to be identified and resolved. Their resolution yields new requirements or modified ones.