- [Instructor] Geometric Dimensioning
and Tolerancing standards build upon
and improve existing dimensioning practices
by giving designers new symbols and methods
to completely and precisely communicate design intent.
By using the geometric dimensioning
and tolerancing methodology, a designer can define
the range of acceptable variations
for the geometry of a part as it goes
from CAD to manufacturing.
Geometric dimensioning and tolerancing standards
provide a system of datums that define which features
are reference features.
These standards also provide a set of symbols
for defining how a feature will be controlled
by a given tolerance.