Pinghu CMMI classification 1. The initial level of software process is chaotic, sometimes chaotic, almost no process definition, success depends on individual effort. Management is reactive. 2. Managed established a basic project management process to track cost, schedule, and features. To develop the necessary process discipline, can repeat the successful experience of previous similar applications made in the project. 3. Defined level software management and engineering process has been both documented, standardized and integrated into a standard software process for the organization. All projects use an approved, tailored standard software process for developing and maintaining software, software products throughout the software process is visible. 4. Quantitative management-level analysis of the software process and product quality, detailed metrics for software process and products are quantitatively understood and controlled. Management has made a conclusion on the basis of objective, management can predict performance in a quantitative range. 5. Quantify the feedback process to optimize the management level and advanced ideas, new technologies to promote the process of continuous improvement. Each level is broken down into process areas, specific goals and specific practices, common goals, common practice and common characteristics: Each level has several process areas composed of several process areas together to form a software process capability. Each process area, there are some special goals and common goals, through the appropriate special practice and general practice to achieve these goals. When all the practices and common practices of a particular process area are required to be implemented, will be able to achieve the goals of the process area. Ability grade: below the continuous representation, a total of six ability grade (0-5), the ability of each level corresponds to a general goal, as well as a set of general and specific methods execution method. 0 incomplete executed Level 2 Level 1 Level 3 Managed Defined Level 4 Level 5 quantitative management optimization level