Review the traceability record to determine the non-functional system requirements associated with the subject use case.  Associate each non-functional system requirement for the subject use case with the relevant system block(s) by creating SysML <<satisfy>> dependencies from the system block to the requirement.

In some case it may not be possible to allocate the non-functional requirement as-is (for example, a mass constraint).  In these cases the system level requirement must first be decomposed to yield derived requirements that together satisfy the system level requirement.