You can perform the Requirement gap and coverage analysis by using:

Displaying requirements on IBD diagram
  • Requirement matricesThe matrices enable you to analyze, create, and modify relationships between Requirements and other design elements. It is especially valuable that you can display relationships that cannot be represented in diagrams, such as representations (classes by lifeline), behavior representations in other diagrams, operation representations by Call Behavior Actions, etc. How to work in matrices >>
  • Metric tables. The metrics allows collecting various metrics used to evaluate the current state of your model. How to work in Metric table >>