上充大1.3 The Purpose of System Design SHANGHAI JIAO TONG UNIVERSITY Bridging the gap between Problem desired and existing system in a manageable way © Use Divide and Conquer New We model the new system to be developed as a set of System subsystems Existing System Software EngineeringSoftware Engineering 1.3 The Purpose of System Design Bridging the gap between desired and existing system in a manageable way Use Divide and Conquer • We model the new system to be developed as a set of subsystems Problem Existing System New System