The history of the origins edit CMMI CMM With the deepening of the study, combined with other disciplines are also characteristic of this system, launched its own CMM model. For example, HR Capability Maturity Model, Systems Engineering Capability Maturity Model and so on: (1) SW-CMM (Software CMM) Software CMM (2) SE-CMM (System Engineering CMM) systems engineering CMM (3) SA-CMM (Software Acquisition CMM) software procurement CMM (4) IPT-CMM (Integrated Product Team CMM) Integrated Product Groups CMM (5) P-CMM (People CMM) Capability Maturity Model for human resources in order to show the difference, a lot of information at home and abroad The CMM called SW-CMM. SEI according to the original plan, an improved version of CMM 2.0 should be completed in November 1997, then in practice after obtaining feedback from version 2.0 was completed in 1999 quasi CMM2.0 version. Development Introduction Since 1994 SEI officially released software CMM, have also developed a systems engineering, software procurement, human resource management, and more capability integrated product and process development in the maturity model. Although these models in many organizations have been a good application, but for some large software companies, may need to use a variety of models to improve their ability to process a wide range of situations. Then they will find there are some problems, mainly reflected in the question: n can not concentrate their different ability to process improvement to achieve greater results; n to be some duplication of training, assessment and improvement activities, thus increasing the cost of many; n encounter different models have some of the same things quite different, or activities inconsistent, and even conflict. So, I hope to integrate the needs of different models produced CMM. 1997, the US Federal Aviation Administration (FAA) has developed FAA-iCMMSM (Federal Aviation Administration integrated CMM), the model is applied to integrated systems engineering SE-CMM, SA-CMM and Software Software acquired SW- CMM three models of all the principles, concepts and practices. The model is considered to be the first integrated model. CMM and CMMI biggest difference and difference: CMMISM-SE / SW / IPPD / SS 1.1 version has four integrated components, namely: systems engineering (SE) and Software Engineering (SW) is the basic subjects, for some organizations may also Applications integrated product and process development (IPPD) content, if related to the outsourcing vendor management can be applied accordingly SS (Supplier Sourcing) section. CMMI, said there are two ways, one is all very familiar, and software CMM-stage performance of the same method, the other is a method of continuous performance. The performance difference between these two methods is:-stage approach is still the performance of a number of CMMI process areas divided into five maturity levels of the organization to help implement the recommendations CMMI process improvement in a relatively easy path of development. The continuous performance methods through the CMMI process areas will be divided into four categories: process management, project management, engineering and support. For each category in the process zone is further divided into basic and advanced. Thus, in accordance with the time implementing CMMI continuous representation, an organization can practice project management or certain other has to be the best, but other aspects of the process areas can be completely without considering. CMM's success prompted the development background in other disciplines have also developed a similar process improvement models, such as systems engineering, requirements engineering, human resources, integrated product development, software purchases, etc., from the CMM model is derived from a number of improvements, such as: (1) SW-CMM (Software CMM) Software CMM (2) SE-CMM (System Engineering CMM) systems engineering CMM (3) SA-CMM (Software Acquisition CMM) software procurement CMM (4) IPT-CMM (Integrated Product Team CMM) integration Product Groups CMM (5) P-CMM (People CMM) Capability Maturity Model of Human Resources Office of the US Department of Defense requirements for SEI delayed CMM2.0 version, but must first complete a more urgent project CMMI, the reason is the same one the existence of multiple process improvement organization model may cause conflict and confusion, CMMI is to solve how to maintain coordination between these modes. CMMI (Capability Maturity Model Integration) that capability maturity model integration, which is an idea the United States Department of Defense, and all they want to be developed in the various Capability Maturity Model, integrated into a framework. This framework has two functions, the first reform, software procurement methods; second, to establish a process from the perspective of integrated product development and departure, including the principles of sound systems development process improvement. The case of software, CMMI is a revised version of the SW-CMM. It Concurrently the SW-CMM version 2.0 C version of the draft and the SPA is more rational, more scientific and more careful advantages. In his SEI CMMI-SE / SW 1.0 version, announced about two years to complete the transition from the CMM to CMMI. CMMI project more industry and government departments to provide an integrated set of products, and its main purpose is to eliminate the inconsistency between the different models and duplication, reduce costs and improve on the model. CMMI will be more systematic and consistent framework to guide the organization to improve the software process and improve the development of products and services, access and maintenance capabilities. By the industry, the US government and the Carnegie Mellon University Software Engineering Institute pioneered the Capability Maturity Model Integration (CMMI) project aims to help companies alleviate this dilemma. With the original Capability Maturity Model Similarly, CMMI also includes the necessary elements to establish an effective process in different areas, reflecting the industry generally recognized "best" practices; professional fields covering software engineering, systems engineering, product development and systems integration procurement. In this context, CMMI for businesses to build and improve the process of providing guidance and framework for action; at the same time as their business review process provides a reference to the industry benchmark. The key elements of CMMI since his debut, it reached the goal has not changed, the first one is the quality, the second is the timetable, and the third is to use the lowest cost. However, special emphasis is, CMMI is not a traditional, confined to the software development life cycle, it should be applied in a broader category - engineering life cycle. Establish TSP, but also to support the CMMI for such a system. CMMI So what is it? It is not a process, nor is it to tell you how to do a thing. If you use a word to summarize what is CMMI, it is a key element of each process, many areas in which an integrated point. It is such a basic framework that can be used to measure your effectiveness and practicality; able to identify such opportunities, continue to improve the opportunities, including aspects of business goals, as well as risk reduction strategies and other projects in.