Agile methodologies, such as XP and Scrum, focus on lightweight processes which allow for rapid changes (without necessarily following the pattern of SDLC approach) along the development cycle.
敏捷的方法，如XP和Scrum，专注于轻量级进程，这些轻量级进程在开发周期中允许快速的变化(不一定要按照SDLC的开发模型)。