A description of an imagined sequence of events that includes the interaction of the product with its environment and users, as well as interaction among its product components. Operational scenarios are used to evaluate the requirements and design of the system and to verify and validate the system.

1. This glossary is from Appendix C of Technical Report CMU/SEI-2002-TR-004.
2. ® CMMI is registered in the U.S. Patent and Trademark Office by Carnegie Mellon University.