Use of Modelling Foam in prototyping/modelling

Question 1

How and why are prototypes tested when completed?

Answer 1

Against a specification
In the intended environment

To obtain third party feedback
To obtain expert opinions
To suggest further developments.

Question 2

What are the pros of modelling foam?

Answer 2

Cheep (£10 per kg)
Quick to use
Can be used for a variety of products
Shows scale and ergonomic issues that cant be detected in CAD- tangible.
Durable- both lightweight and strong.

Question 3

How is modelling foam shaped?

Answer 3

Cut- a knife, blade, jigsaw or hot wire cutter.
Sanded- to remove tool marks, starting with a low grit and working up.
Held- shaped around parts of the body.