CI is Integrate Constantly
What’s the CI? Most of us will answer: it’s continuous integration. Continuous Integration is a so beautiful name that we often forget its real meaning. In our project teams, we use SVN tool, we build our CI-Server using CruiseControl or Jenkins, that’s CI? No! They are just tools which are used to help us more effectively apply CI.
Continuous integration means integrating early and often to avoid the pitfalls of "integration hell". The practice aims to reduce rework and thus reduce cost and time.
One word, CI is “Integrate Constantly”.