A collection is a set artifacts in Rational Requirements Composer that are captured at a single point in time. They are useful for grouping related requirements that share a common status, such as all requirements for a particular component that have been reviewed and approved. By creating a link from a collection to a test plan in Rational Quality Manager, you ensure that requirements in the collection are validated by the test plan. When you generate linked test cases from the requirements, you ensure that each requirement in the collection is linked to and validated by a test case within the test plan.
You can also hover over a link to view the status of a test plan or test case, or click a link to open the test plan or test case in Rational Quality Manager.