استخدام هندسة البرمجيات في تطوير وتقويم الانظمة الالية : دراسة حالة الادارة العامة للشئون المالية بوزارة الدفاع

Abstract

Abstract The Financial system interest increased significantly so increased interest in the development of these systems to a more flexible environment that allows quick reaction responses to customer needs. But we find that there is a Legacy system has been developed for more than 10 years, but it still works and effect of in their environment and providing services. The main problems of legacy systems are the enlarging technology gaps between them and their surrounding systems and their resistance to modification and evolution. And Documentation is usually incomplete and out-of-date. Leading to difficulty and high cost of maintenance. Re-engineering a legacy system mainly focuses on improving quality and maintainability of the existing system by introducing new designs. In this research was to explore object-oriented methodologies and propose a methodology for re-engineering the software-based object-oriented model and propose a link. A The Unified Modeling Language (UML) is a standard language provides graphs to describe and document the system used in the system documentation. It was also suggested linking model to link the financial systems between the units and the various departments and branches of public financial management. In the case study, the proposed methodologies are successfully applied to Re-engineer the legacy system. Results indicate that objected-oriented Methodologies help improve system flexibility, usability, maintainability and extendibility. Also results indicate that the existing system was its sub-systems, but it is incomplete and the structures are not defined properly. Also it has added new possibilities in the new system using ORACLEI lG databases and developer6i.