1. Common names

To understand the application of functional dimensioning, you need to understand the difference between the various drawings used in industry (assembly drawing, definition drawing, manufacturing drawing), their role in obtaining the product, and what is meant by a good or bad part in terms of minimum production cost. The advantages of functional dimensioning over conventional (or arbitrary) dimensioning, and the respective roles of the design and engineering departments in the dimensioning of parts, will be readily apparent from these concepts.

NF E 04-550 "Dessins techniques : cotation et tolérancement fonctionnels" (Technical drawings: functional dimensioning and tolerancing) will be very useful, particularly for the definitions of certain terms partially reproduced here