Apple has a concept called the Directly Responsible Individual (DRI). On a particular project, that person is solely held accountable for the project’s success (or failure). The DRI can be anyone from an executive to a manager to an individual contributor.
Done right, the DRI system should:
- Clarify responsibility. Who should I talk to? Who makes the final decision? Where does the buck stop?
 - Increases individual ownership. When individuals feel a sense of ownership, they perform better (at least accurate, in my experience).
 - Delineate responsibility. The DRI model requires tasks to be explicitly assigned.
 - Streamline the decision-making process. More unilateral decision-making can be better for risky projects (see veto power and decision-making processes).
 
Some of the challenges:
- Potential overemphasis on individuality. Need to balance individual prerogative and collective teamwork.
 - Not ideal for all decisions. Some situations require extra risk mitigation and oversight (i.e., committees, vetos, the board, etc.).
 
For a public description of how this model works in practice, check out the page on how DRI works at GitLab in their employee handbook, which is open-source.