engineering, of merging all developer working copies with a shared mainline several times a day. It was first named and proposed by Grady Booch in his method,[1] who did not advocate integrating several times a day. It was adopted as part of extreme programming (XP), which did advocate multiple integrations a day, perhaps as many as tens a day. The main aim of CI is to prevent integration problems, referred to as "integration hell" in early descriptions of XP. CI isn't universally accepted as an improvement over frequent integration, so it is important to distinguish between the two as there is disagreement about the virtues of each…… http://en.wikipedia.org/wiki/Continuous_integration