Summarize several important features of level 3:
1) clearly defined requirements development, design, coding, testing, integration, software development requirements of each process.
2) project management put forward higher requirements, to take advantage of the organization-level data to manage the project.
3) the emergence of specialized PA for the organizational level, requiring a special organization to be responsible for process improvement work.
4) provides a guide to make the best decisions, and this method can be used for software engineering, can also be used for process improvement organization level.
From these characteristics, we can see that the three have detailed requirements for various aspects of software development, two areas many do not detail all been clear. A reach three companies will certainly define a lot of the various aspects of the software development process, and there will be organization-wide asset library. So three is called "defined" level.
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