ABSTRACT
Symbology contained in a feature control frame can convey information vital to the functionality of a part. In order to understand this symbology, one must not only be able to read the individual name of a symbol but also the implications and ramifications of the symbols when strung together in sentence or paragraph form. This chapter begins to explain some of the vital nuances in reading part functionality from a feature control frame. The maximum material condition symbol allows the geometric tolerance of location to grow as the hole grows and thereby creates a reduction in part cost by the acceptance of more of the parts that have been produced. This increase in geometric positional tolerance is only allowed because the functional requirements of the part are not endangered by this tolerance zone growth.
