The Operational Concept Document (OCD) is used to: a. describe the characteristics of the Mission System and Support System from an operational perspective; b. facilitate an understanding of the overall system goals for both the Mission System and Support System; c. detail missions and scenarios associated with operations and support of both of the Mission System and Support System; and d. provide a reference for determining 'fitness for purpose'. The Contractor and the Commonwealth rely on the OCD as the basis for common understandings by all stakeholders, including warfighters (end-users) and system developers. It can be viewed as a translation vehicle between the various specialty domains of the stakeholders.