Author(s)

T. Fotiadis & G. E. Haramis

Abstract

Experience has shown that the everyday use of information systems creates reasons for systems changes and improvements (systems maintenance). The paper refers to the systems development phases, to systems maintainability and to maintenance in general, to systems sections maintenance, and systems operation. It defines the presuppositions for successful systems maintenance, and proposes the steps to be followed for its implementation. 1 Introduction The project for the development of one System should be divided in clearly defined phases. These phases are valid for the development of every information system and are the following: - Systems Analysis. Study the existing system. Requirements Definition (RD) of the new system. - Systems Design. External. Internal. - Programs Development. - Systems Test. \“The outputs of each phase will be produced by the performance of tasks such as following: fact finding system selection data analysis system analysis scenario design

Keywords