Operational Focus Area (OFA)
milestone in the project schedule and represent key point in the life cycle of a project by which time appropriate deliverables/internal project milestones (highlighting, for instance, the availability of draft deliverables or other, informal documents supporting the Exercise) need to have been produced and provided to the Operational Focus Exercises to which the project contributes in function of the OFA validation path.
SESAR (2015), WP & Project Management Execution Guidelines, Ed. 02.02.00
Lexicon Release 2015.2