Conclusion
The basics of ISO Tolerancing with functional approach

This article provides only the essential notions of ISO dimensioning, with the aim of reducing the diversity of terms used, simplifying definitions as much as possible and providing the most generic tolerancing model possible.

Some may think that this is already very complicated. Others will observe that the diversity of business needs is enormous. The apparent complexity of specifications is intended to express functional requirements in the right way, to maximize tolerances and reduce production and inspection costs.

In terms of cost, when a designer clearly writes, for example, an association criterion based on the characteristics of a link, he does this only once, when drawing up the design, with all the information on how the mechanism works. He takes responsibility for it. The cost is therefore limited, and the definition drawing is...