Comparison of the CMM and CMMI
CMMI's full name: Capability Maturity Model Integration, the Capability Maturity Model Integration. Since 1994, SEI CMM software has been officially released, have they developed a systems engineering, software procurement, human resources management and integrated product and process development of multiple capability maturity model. Although these models have been in many organizations, a good application, but some large software companies, it may arise which require the concurrent use of various process models to improve his own capacities. Then they will find some problems, mainly problems reflected in:
鈻?can not focus on process improvement of their different capacities to achieve greater results;
鈻?To some duplication of training, assessment and improvement activities, thus increasing the number of cost;
鈻?different models for the same thing quite different, or activities inconsistent, even contradictory.
So, I hope the demand for integration of different models produced CMM. In 1997, the U.S. Federal Aviation Administration (FAA) developed the FAA-iCMMSM (Federal Aviation Administration's Integrated CMM), the model incorporates applied system engineering SE-CMM, software for the SA-CMM and SW-Software All three models of CMM principles, concepts and practices. The model is considered the first integrated model.
CMMI and CMM biggest difference is:
鈻?CMMISM-SE/SW/IPPD/SS 1.1 version has four integrated components, namely: systems engineering (SE) and Software Engineering (SW) is the basic subjects, some organizations can also be used for integrated product and process development (IPPD ) content, if related to the outsourcing supplier management can be applied accordingly SS (Supplier Sourcing) part.
鈻?CMMI has two representations, one is all very familiar, and the same software CMM-stage performance, and the other is the method of continuous performance. The performance difference between these two methods are:-stage performance approach is still in the CMMI process area into a number of 5 maturity levels of organizations to help implement CMMI recommendations to achieve a relatively easy process improvement path. The method of continuous performance through the course of the CMMI in the region is divided into four categories: process management, project management, engineering and support. For each category in the process of the region, is further divided into basic and advanced. In this way, 鍦?expressed as approach to the implementation of continuous service when the CMMI, project management can be an organization or other certain of practice had to do the best, Er Qitafangmian of Guocheng region can Wanquan not Kaolv.
鈻?Software CMM 2 绾?total of six key process areas in CMMI increase of 1: Measurement and analysis. The original six key process areas of CMMI in the name and content in the paper improved, but there is no significant adjustment of the main content. Software CMM 4 绾?total of two key process areas in CMMI is still the two, only the name and content improvements. Software CMM 5 绾?Total 3 KPA, carried out in the CMMI merged into two, but mainly unchanged. The most significant change in the CMMI 3-Class, the original seven KPA into a 14, which originally requested the project activities in software product engineering KPA-a detailed split, combined with common software life cycle model were mapped. CMMI process in new regions also involved in the past did not mention the content, such as decision analysis and solutions, such as integrated team.
CMM or CMMI in the end the choice is mainly based on the following aspects to consider:
鈻?implementation of the company's business characteristics: If the size of the business is not large, the business concentrated mainly in software development, it is more applicable to the software CMM. If the relatively large size of the business (more than 100 developers) and business not only focus on software development, hardware development including even the hardware agent (procurement) can consider implementing CMMI.
鈻?implementation of business process improvement familiarity: if companies had already implemented ISO 9000, and achieved good results, you can consider implementing CMMI. If the business while not imposing a CMM, but for the process improvement has been more concerned, who are related to training, and even some spontaneous process improvement, then you can consider implementing CMMI. If no contact in the past similar work, the best start with the software CMM 2 grade levels, first of all establish a continuous process improvement ideas. In addition, the requirements of the software CMM to be slightly lower than CMMI. The difficulty of implementation can be reduced.
鈻?implementation of business process improvement project budget: In any case, is almost certain that the cost of implementing CMMI certainly higher than some of the implementation of CMM. The look on the model itself, CMMI Level 2 process area 7 is not in its content than the software CMM level 2 key process areas more than 6 months how much. In this case, we fully can "do more with less work," that can be used CMM implementation and assessment methods, but when in reference to CMMI process improvement requirements, so that the economic lot.
鈻?implementation of the enterprise can use the-stage evolution line: if companies just want to improve their unilateral in project management, engineering activities in support of activities or process management in some aspects of the four aspects of the capacity it can only be used on CMMI continuous representation. If the implementation of the company can accept the idea of maturity levels (currently the majority of companies still see more accustomed to domestic maturity level), then it does not necessarily have to choose a CMMI.
鈻?implementation of the CMM and CMMI can be a smooth transition.
Firstly, CMMI does not require a company to do first CMMI level 2 and then back to a higher maturity level of evolution, when the assessment is also required to do so.
In addition, CMMI assessment will be assessed according to the maturity level, check all the process is not higher than the regional level. In other words, a company official in the CMM level 2 assessment reached maturity in the future to carry out process improvement based on CMMI. CMMI 3 level in the formal assessment, CMMI 2 level content also has to be checked. If we can do CMM 2 level when implemented in accordance with the requirements of CMMI, the effect there is no discount, but implementation of the enterprise, will save a lot of training and assessment in the "extra" costs. (Where the "extra" cost of CMMI is part of higher fees than the CMM)
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