VARIETY
OF MODELS
| PHYSICAL |
Wind tunnel & blade
planetarium, global, structure, architect’s model of building
design |
| GRAPHICAL |
Representation of variables
in 2 or 3 dimensional space. (demand history, population, food
production, traffic intensity) |
| PICTORIAL |
Visual
pictures, Cartoons, Road signs 
|
| SCHEMATIC |
Organization chart
with authority relationships, information flow, current flow
|
| MATHEMATICAL |
Symbols used to represent
real world situation |
| SIMULATION |
An approximation of
the real world generally carried out with a high speed computer |
|
