CMMI Maturity Levels:

• Level-1:  Chaotic, individual heroics  
• Level-2: Managed processes are planned, documented, monitored, and controlled at the project level  
• Level-3: Defined  processes are described in standards, procedures, tools and methods  
• Level-4: Quantitatively Managed Processes are controlled using quantitative techniques  
• Level-5: Optimizing Continually improving process performance