Chapter 6: The Traditional Approach to Requirements Systems Analysis and Design in a Changing World, 3rd Edition Learning Objectives Explain how the traditional approach and the object-oriented approach differ when an event occurs List the components of a traditional system and the symbols representing them on a data flow diagram Describe how data flow diagrams can show the system at various levels of abstraction Systems Analysis and Design in a Changing World, 3rd Edition Learning Objectives (continued) Develop data flow diagrams, data element definitions, data store definitions, and process descriptions Develop tables to show the distribution of processing and data access across system locations Read and interpret Information Engineering models that can be incorporated within traditional structured analysis Systems Analysis and Design in a Changing World, 3rd Edition 3 6 Overview What the system does what an event occurs: activities and interactions Traditional structured approach to representing activities and interactions Diagrams and other models of the traditional approach RMO customer support system example shows how each model is related How traditional and IE approaches and models can be used together to describe system Systems Analysis and Design in a Changing World, 3rd Edition Traditional and Object-Oriented Views of Activities Systems Analysis and Design in a Changing World, 3rd Edition Requirements Models for the Traditional and OO Approaches Systems Analysis and Design in a Changing World, 3rd Edition Data Flow Diagrams Graphical system model that shows all main requirements for an IS in one diagram Inputs / outputs Processes Data storage Easy to read and understand with minimal training Systems Analysis and Design in a Changing World, 3rd Edition Data Flow Diagram Symbols Systems Analysis and Design in a Changing World, 3rd Edition DFD Fragment from the RMO Case Syste