This scenario addresses multiple needs for traceability reporting.
Requirements exist at various levels and are traced. A report is required on the traceability between one collection of artefacts (e.g. a set of user requirements) and another (e.g. a set of system requirements).
A traceability graph exists that contains all source and destination artefacts, all intermediate artefacts, and all relevant relationships between them.
This scenario is general, and could be applied to reporting on any linked artefact sets (e.g. system requirements to test cases).
-- SimonWills - 05 Feb 2010