Wiktionary
operating concept
n. An operating concept or OpCon or OPCON (or sometimes incorrectly OPSCON) is a description, usually graphical, showing major, interactive participants, players or subsystems and their interrelationships.
Usage examples of "operating concept".
Then, with an increasing sequence of personal experiences, it's no longer a question of blind belief but rather a real operating concept that has a firm basis for each person.