Responsibility assignment matrix

A responsibility assignment matrix, RACI matrix (responsible, accountable, consulted and informed matrix; ) or linear responsibility chart, is a project management technique that describes the responsibilities of various stakeholders in completing tasks or deliverables. The matrix assigns one of four responsibilities to each stakeholder in executing a deliverable: Responsible, Accountable, Consulted, and Informed.

Source: Wikipedia — Responsibility assignment matrix (CC BY-SA 4.0)