A Concept is an expression of the capabilities that are likely to be used to accomplish an activity in the future.
Doctrine is an expression of the principles by which business, or military forces guide their actions and is a codification of how activity is conducted today.
Military doctrine is the expression of how military forces contribute to campaigns, major operations, battles and engagements. It is a guide to action, rather than hard and fast rules. Doctrine provides a common frame of reference across the military.
Doctrine is authoritative, but requires judgement in application.
SEA has Subject Matter Experts (SME) and Suitably Qualified and Experienced Personnel (SQEP) in the fields of both defining doctrine and originating concepts.