Software Reverse Engineering to Requirement Engineering for Evolution of Legacy System

Now a days new technologies are introducing in market. Legacy Systems are the old systems that have old technologies. Large organizations are transferring their data from legacy systems to new technology systems. This paper focus on reverse engineering of legacy systems to get requirements from it. By reverse engineering of legacy system we can get all old requirements and construct our new system easily. This method will give high efficiency and it will develop confidence of user on the system. This method will provide easiness for the users that are working on legacy system. Those users can easily switch on new systems because new systems will not have so much difference from old systems.