![From](https://i0.wp.com/pangaro.com/designconversation/wp-content/uploads/screen-shot-2015-10-15-at-10-27-15-pm.png?resize=300%2C184)
When we understand something—let’s say a concept, like a table—we have some formulation of that “in our head”. That formulation is something we can manipulate while we’re thinking or conversing or acting.
Why Design is Conversation and Why Conversation for Every Design
Models—good ones, anyway—are valuable in a number of ways.
The best resource I know on the topic is the paper Models of Models by Hugh Dubberly.