Abstract
Agile development has been regarded as a special technique that has limited application area. But IBM Rational states Agile development as "coming to mainstream" and strengthens its guidance to Agile development. In there, to extend the application area as a mainstream, the best practices including the environmental actions are provided. On the other hand, a survey within IBM Japan, which was conducted as a part of study group, revealed that Agile principles are recognized to be beneficial to common development whilst degree of understanding of Agile development affects the recognition of problem. Agile development is a change of culture and consciousness, and it is related to various areas. To understand it correctly and to be conscious about problems are the pressing needs.
