List the process maturity levels in SEIs CMM.

Level 1: Initial - Few processes are defined and individual efforts are taken.
Level 2: Repeatable – To track cost schedule and functionality basic project management processes are established.
Level 3: Defined – The process is standardized, documented and followed.
Level 4: Managed – Both the software process and product are quantitatively understood and controlled using detailed measures.
Level 5: Optimizing – Establish mechanisms to plan and implement change.