Responsible
The person or role that performs the work or produces the deliverable. There may be more than one Responsible party, but too many can dilute clarity.

A practical tool for defining who performs work, who owns the outcome, who must be consulted and who needs to be informed. Build a project or process RACI matrix, analyse it automatically for missing ownership, multiple accountabilities, overloaded roles and communication complexity, then generate a professional governance report for print or PDF.
The person or role that performs the work or produces the deliverable. There may be more than one Responsible party, but too many can dilute clarity.
The single role ultimately answerable for the outcome and with authority to approve, accept or ensure completion. A strong RACI normally has one A per activity.
Provides input, expertise, review or advice. Communication is two-way. Excessive consultation can slow decision-making and is worth challenging.
Needs visibility of progress, outcome or decisions but does not actively participate in the work. Communication is mainly one-way.
Some organisations add S = Support. Use it only when distinguishing active support from Responsible genuinely improves clarity. Avoid adding letters simply to make the model more complex.
Looks across each activity: Is there an A? Is there an R? Are there multiple As? Is the row overloaded with consultation or information?
Looks down each role: Is one person Accountable for too much? Is a role involved in nearly everything? Is a stakeholder never meaningfully engaged?
Scores structural completeness and clarity. It does not judge competence or organisational politics and should never replace management agreement.