Is an executive sponsor enough to own an AI initiative?
Approving the investment and running the process are two jobs, so name a person for each. The business owner holds the intended result and decides whether it justifies continuing. The process owner handles daily operation.
An executive sponsor can approve investment without being the person who maintains the process. The accountability discussion makes that difference worth writing down.
Whoever owns the business result should be able to explain why the initiative matters. The process owner covers source maintenance, employee questions, exception handling and the review schedule, and should know which technical and specialist people they can call on.
Spell out how the two work together. A recurring error may need an operating fix, while a change in business priorities may need a scope decision. Make the escalation route clear so every issue doesn't wait for an executive meeting.
I'd confirm that the people named accept the duties and have the authority and time to carry them out. A chart with a name in every box isn't finished until the people doing the work know which decision belongs to whom and can get it made.