Modernização de sistemas legados fazendo uso de um processo de reengenharia

Abstract

Over time the software that support the business processes of the companies will suffer modifications in their original requirements as the business needs change. These changes end up compromising the quality of the system and making it more difficult to maintain, to the extent that they begin to have difficulty meeting the business. When a system reaches this stage, an assessment must be made in order to identify candidates for modernization and reach the best strategy applicable at that time, i.e. whether it is more feasible to continue giving maintenance, replace or modernize the system. Coming to the conclusion that the best strategy for the system is modernize it, a detailed study must be done in order to obtain the understanding and define the target architecture, as well as the modernization strategy applicable to it and validate if it is feasible or not. This process aims to minimize the risks of the modernization project since it includes an assessment of the legacy system, of the technology used, the target technology and the proposed solution before start the modernization project. The process for the modernization project is to apply the concepts of reverse engineering and forward engineering within a spiral process of reengineering that aims to deliver new parts of the modernized system to each iteration, where the legacy and modernized system run in parallel at the same time that the data are being gradually migrated with the use of bridges to convert them to the new format, until all of the legacy has been replaced