Which role is accountable for the operational management of a process?

A process practitioner executes process activities and tasks but does not hold accountability for the overall operational management of the process.

In ITIL, the process manager is explicitly defined as the role accountable for operational management of a process, including planning, coordinating, monitoring, reporting, and managing the process resources and activities on a day-to-day basis. This distinguishes the role from the process owner, who holds strategic accountability.

A service manager is responsible for managing end-to-end IT services from the customer perspective, not for the operational management of individual processes.

A change manager manages specifically the change management process and is an example of a process manager, not a separate generic role accountable for all process operations.