Operational concepts and scenarios are evolved to facilitate the selection of product-component solutions that, when implemented, will satisfy the intended use of the product. Operational concepts and scenarios document the interaction of the product components with the environment, users, and other product components, regardless of engineering discipline. They should be documented for operations, product deployment, delivery, support (including maintenance and sustainment), training, and disposal and for all modes and states.
The environments (operating, support, training, etc.) also need to be evolved. The environment of any given product component will be influenced by other product components as well as the external environment.