Reengenharia do Sistema de Informação de Pessoal (SIP) Direcção de Recursos Humanos (DRH)- MINED

Abstract

This study aims to address concepts about the software maintenance process, specifically with regard to reengineering and reverse engineering. To adequately address software maintenance techniques, three dependent concepts must first be considered: the existence of a software development process, the presence of a system to be analyzed, and the identification of abstraction levels. When the system is not easy to maintain, but is very useful, it must be rebuilt, starting from the existing system (via source code, interface or environment), its functionalities are abstracted and the analysis model and the project are built. of the software. This process is called software reengineering. The traditional technique, which progresses progressively through the phases of the software development process, is called progressive engineering. The execution of this technique consists of starting from implementation-independent projects, which have high levels of abstraction, going towards the physical implementation of the system. The reverse engineering process, characterized by retroactive life cycle activities, which go from a low level of abstraction to a high level of abstraction, is known as reverse engineering. The software reengineering process consists of two distinct phases. In the first, the software being reconstructed is decomposed into parts, in order to be understood. In the second phase, the software is reconstructed, in the desired form, from the product of the first phase, including any necessary adjustments.