This chapter presents the following content: Introduction, a modern approach to systems analysis and design, types of information systems and systems development, systems development life cycle (SDLC), SDLC maintenance phase, alternatives to traditional waterfall SDLC,. | Business System Development CSC581 Lecture 31 Course Revision 2 Introduction Information Systems Analysis and Design Complex organizational process whereby computer-based information systems are developed and maintained Application Software Computer software designed to support organizational functions or processes Systems Analyst Organizational role most responsible for analysis and design of information systems 3 Introduction (cont.) 4 A Modern Approach to Systems Analysis and Design 1950s: focus on efficient automation of existing processes 1960s: advent of 3GL, faster and more reliable computers 1970s: system development becomes more like an engineering discipline 1980s: major breakthrough with 4GL, CASE tools, object oriented methods 1990s: focus on system integration, GUI applications, client/server platforms, Internet The new century: Web application development, wireless PDAs, component-based applications Types of Information Systems and Systems Development Transaction . | Business System Development CSC581 Lecture 31 Course Revision 2 Introduction Information Systems Analysis and Design Complex organizational process whereby computer-based information systems are developed and maintained Application Software Computer software designed to support organizational functions or processes Systems Analyst Organizational role most responsible for analysis and design of information systems 3 Introduction (cont.) 4 A Modern Approach to Systems Analysis and Design 1950s: focus on efficient automation of existing processes 1960s: advent of 3GL, faster and more reliable computers 1970s: system development becomes more like an engineering discipline 1980s: major breakthrough with 4GL, CASE tools, object oriented methods 1990s: focus on system integration, GUI applications, client/server platforms, Internet The new century: Web application development, wireless PDAs, component-based applications Types of Information Systems and Systems Development Transaction Processing Systems (TPS) Automate handling of data about business activities (transactions) Process orientation Management Information Systems (MIS) Converts raw data from transaction processing system into meaningful form Data orientation Decision Support Systems (DSS) Designed to help decision makers Provides interactive environment for decision making Involves data warehouses, executive information systems (EIS) Database, model base, user dialogue 6 Types of Information Systems and Systems Development (cont.) 7 Systems Development Life Cycle (SDLC) Traditional methodology for developing, maintaining, and replacing information systems Phases in SDLC: Planning Analysis Design Implementation Maintenance 8 SDLC Planning Phase Identify, analyze, prioritize, and arrange IS needs SDLC Analysis Phase Study and structure system requirements SDLC Design Phase Convert recommended solution to system specifications Logical design: functional features described independently of computer platform .
