EVANS, M., 1992. Model or prototype which, when and why? IDATER 1992 Conference, Loughborough University
The translation of design ideas from the drawing board to a three dimensional representation marks a
key stage in the development of a product. This translation may occur at any time during the design
activity, involving resources appropriate to the required outcome.
Techniques adopted to generate three dimensional models or prototypes vary according to the nature of
the evaluation required, ranging from card and foam ‘sketch models’ to precision engineered components.
This paper will discuss techniques adopted in the representation of three dimensional designs that lead
to the effective evaluation of product attributes. The terms ‘model’ and ‘prototype’ will be defined in the
context of New Product Development (NPD); techniques of modelling and prototyping will be addressed;
and indications will be given of the reasons for the adoption of particular techniques.