Product and service development -CMMI Development Model (English: CMMI for Development, referred to as the CMMI-DEV), the model is currently the most widely used in the national model, CMMI model refers often said that model, which is mainly used for software engineering hardware engineering, systems engineering and other product development. This model is basically covering all areas of product development process, including: project management, requirements, design, development, verification, validation, configuration management, quality assurance, decision analysis, and so on to develop a series of improvements and training activities.