Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
In situations where you're unable to identify one excellent Responsible Party for a role (which is always best), find two or three believable people who care deeply about producing excellent results and are willing to argue with each other and escalate their disagreements if necessary. Then set up a design in which they check and balance each other (to do this well, see principles on how to hire, design and manage well). Though it's not optimal, such a system will have a high probability of effectively sorting the issues you need to examine and resolve.