Meaning
The single designated individual responsible for executing and reporting back on an agreed action item.
Three examples from work
Meeting hygiene
PMEvery action item must have a clear deadline and a single action owner.
DevAssign the database indexing ticket to me; I am the action owner.
Post-mortem tracking
LeadWho is the action owner for the automated backup restore test?
DevOpsI am the action owner and will post verification evidence by Friday.
Steering committee
DirectorUnassigned tasks never get done; let's name an action owner for each milestone.
Project ManagerUpdated the tracker with owners and target completion dates.
Ensures accountability. If everyone owns an action item, no one owns it. Always designate one person as the action owner.