Process owner

The process owner is the person who co-ordinates the various functions and work activities at all levels of a process. This person might have the authority or ability to make changes in the process as required, and manages the entire process cycle to ensure performance effectiveness. This person is surely the contact person for all information related to the process.
See more at Wikipedia.org...

The person who coordinates the various functions and work activities at all levels of a process, has the authority or ability to make changes in the process as required and manages the entire process cycle to ensure performance effectiveness.