This introductory user's guide to systems analysis and systems design focuses on building sustainable information systems to meet tomorrow's needs. It shows how practitioners can apply multiple participatory perspectives in development so as to avoid future problems. As a practical guide it is presented to be readily comprehensible and is organized to enable users to concentrate on their goals efficiently and with minimum theoretical elaboration. The chapters follow the sequence involved in planning an information system explaining key words the time involved in each step ending with a tutoria.