Artifacts > Requirements Artifact Set > Glossary > Checkpoints
For the System Use-Case Model:
Does each term have a clear and concise definition?
Is each glossary term included somewhere in the use-case descriptions? If not, it may imply that a use case is missing or that the existing use cases are not complete. It is more likely, though, that the term is not included because it is not needed. In that case, you should remove it.
Are terms used consistently in the brief descriptions of actors and use cases?
Does a term represent the same thing in all use-case descriptions?