Data Governance is the overall managementof the availability, usability, integrity and security of data used in an enterprise. A sound data governance program includes a governing body or council, a defined set of procedures and a plan to execute those procedures.
Data Governance is not a Project which has start date and an end date. Data Governance is a Program which is a must in some industry and with is good to have in other industries. If an organization is looking to start a Data Governance program, its advisible to start as a project for one year and later make it a program.