The basic definition of a part starts with its drawing and unambiguous representation in drawing is very important to avoid disastrous effects during production and assembly stages.

Geometric dimensioning and tolerancing (GD&T) is a language used in mechanical engineering drawings. It is composed of symbols that are used to efficiently and accurately communicate geometry requirements for associated features on components and assemblies. It is the new tool that eliminates ambiguities and brings out the designer’s intent very clearly in the engineering drawings.

In today’s modern and technically advanced design, engineering and manufacturing world, effective and accurate communication is required to ensure successful end products. Success oriented organizations which require accurate and common lines of communications between engineering, design, manufacturing and quality teams should consider GD&T as their mechanical drawing standard.