What excellent material has been posted by Mr. Simhan and Mr. Ankit! Thanks a lot.
Dear Janani, I would suggest - please do a good search on what competency mapping means and try to understand the concept. Your question on how long it will take to implement completely depends on the nature of the industry, the limitations in gathering information, the initiatives from others to cooperate with you, the chances of the implementation being successful in the very beginning, and above all - your involvement.
Among these 250 employees - how many levels and grades are there? This information is not only for our knowledge but also for your understanding.