olemus
Wiktionary, noun
6 a customary action, habit, or behaviour; a manner or routine.
Synonyms: custom, habit, pattern, routine, wont, wone

ISO 37004:
tegevus, mis järjekindlal sooritamisel annab oma panuse spetsiifilise protsessiotstarbe saavutamisse või spetsiifilisse protsessiatribuuti
activity that, when consistently performed, contributes to achieving a specific process purpose or a specific process attribute