Systems Analysis and Design – Sept. 24, 2001

1. Systems Analysis and Design – Sept. 24, 2001 • Background • System – Information system • SDLC • Modeling • Business Model • Group

2. Background • SAD based on systems approach • SAD an approach to systems building • SAD has history of development • SAD has different methodologies • SAD approaches – traditional, prototype, object-oriented

3. System • What is a system – set of interacting components to achieve a common goal • Input, processing, output • Examples – organic, non-organic, other • Systems aspects • Boundary, components, environment, IPO, constraints, limits • System Types – basic, feedback, learning

4. System types • Basic – no adaptations to output • Feedback – output can vary with feedback • Learning – output can change with adaptation. Changes to responses

5. Information system • A system of People, procedures, hardware, and software

6. SDLC • Systems development life cycle • Preliminary investigation • Systems Analysis • Systems Design • Systems Implementation • Systems Maintenance • Other models prototype –object-oriented

7. Modeling • Tools and methods for presenting systems processes and systems data • DFD, ERD, Systems flowcharts, State Transition Diagram, OO • Developing a model – what is a model? • Different types of model – logical – physical • Model behavior

8. Business Model What is a business model What are some basic types? Value

9. Group Identify three other students you will work with Introduce yourselves, exchange information Find five things you have in common What do you know about SAD Develop a resume of your individual skills and group skills