ITEC 3010 Lecture Notes - Data Flow Diagram, Industrial Control System, Pseudocode

• School: York University
• Department: Information Technology
• Course: ITEC 3010
• Professor: all

Document Summary

Lecture 5 modeling system requirements: events and things oct 19. A model: a representation of some aspect of the system being built. A variety of models: many are graphical (e. g. data flow diagram, er diagram, can show different levels of detail, some focus on data, some focus on processing. Purpose: creating a model can help clarify and refine the design: developing the model raises questions that need to be considered, models help to simplify complex aspects of systems. Learning from the modeling process: new pieces are found to be needed, new questions arise that need to be answered to complete the model. Reducing complexity by abstraction: systems can be complex and intangible, models of parts of the system help to clarify and focus on important aspects. Remembering all of the details: models are a way of storing information for later use in a form that can be digested (e. g. a picture can say a lot)