A process-based approach has the potential to become a/the mainstream approach to safety assurance as regards human aspects of systems (and possibly for all aspects).
Design principles complement process measures, but are dependent upon process capability for their achievement.
Process metrics can (rightly) relieve safety culture of a role in safety assurance.
The possibility of using process metrics in the context of Regulation is intriguing and appears to be under consideration in a number of places.
To pilot ISO PAS 'HS', in conjunction with ISO CD 15288, for an explicit role in safety assurance.