Modeling a System

Model
=>pattern, plan, representation (especially in miniature), or description designed to show the main object or workings of an object, system, or concept

Four major types of models
=>Narrative (based on words);
=>Physical (tangible);
=>Schematic (graphic representation);
=>Mathematical (arithmetic representation)

Data Models
=>Abstract model that describes how data is represented and accessed

=>An integrated collection of concepts for describing and manipulating data, relationships between data and constraints on data in an organization

=>Data modeling: a method used to define and analyze data requirements needed to support the business processes of an organization