[itsm] Custom status for a queue.

Hi All I have a 5 queues and one of the queue should have custom status like "Development", "Unit Testing", "Tested" etc. When agent views the ticket in the above queue, he should view the status of ticket like "Development", "Unit Testing", "Tested" etc. Can any one of you guide me how to create the custom status for a queue in the otrs system? Any help greatly appreciated, Thanks John