### 3.1.4 DEFINITIONS OF MODELLING

Mathematical techniques appeared at a later stage.

Modelling is purposeful and assumes purpose?

Modelling is what modellers do.

Modelling is not simply applied mathematics as know it.

Stages purpose, variables, relationships, testing evaluation

Conjecture.

Model is a representation of an experience capable of being validated and used for further study of the experience represented

Modelling is a process.

Modelling is for explanation, prediction, solving problems and decision making