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Lecture 1: Systems Analysis and Design I -

System Analysis - the process of understanding and specifying WHAT an information system should accomplish System Design – the process to define and describe in detail HOW the information system should be implemented to provide the desired solution Systems analyst – a business professional who uses analysis and design techniques to solve business problems using information technology System – a collection of interrelated components that function together to achieve some outcome Computer Application (App) – a software program that executes on a computing device to carry out a specific set of functions Information System – a set of interrelated components that collects, processes, stores, and provides as output the information needed to complete business tasks.

The analyst approach to the problem 1. 2. 3. 4. 5. 6. 7.

Research and Understand the problem Verify that the benefits of solving the problem outweigh the costs Develop a set of possible solutions Decide which solution is best, and make a recommendation Design the details of the chosen solution Implement the solution Monitor to make sure that you obtain the desired results

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Characteristics of Systems o Functional decomposition – dividing a system into components based on subsystems o System boundary – the separation between a system and its environment  Completed by people o Automation boundary – separation between the automated part of system and manual part  Completed by computer automatically

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Types of information Systems o Transaction Processing Systems (TPS) – Workers  Capture and record information about the transactions that affect the organization o Management Information Systems (MIS) – Middle Managers  Take information captured by the transaction processing system and produce reports management needs for planning and controlling business o Decision Support Systems (DSS) – Senior Managers  Support human decision making and allows users to explore the potential impact of available options or decisions o Executive Information Systems (EIS) – Executives  Provide information for executives to use in strategic planning

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Information Systems Development Process o Incremental Development  where the information system is designed, implemented and tested incrementally until the product is finished o Iterative Development  an approach to system development in which the system is grow piece by piece through multiple iterations o Agile Development  an information system development process that emphasizes flexibility to anticipate new requirements during development...