---
title: All You Need to Know about GD&T
description: GD&T training is crucial for a cooperative, successful manufacturing process in the automotive industry. AIAG offers courses to strengthen that knowledge and apply it effectively.
---

[Powering Performance | AIAG](https://blog.aiag.org)

# [All You Need to Know about GD&T](https://blog.aiag.org/all-you-need-to-know-about-gdt)

 Written by [AIAG](https://blog.aiag.org/author/aiag) | Jun 24, 2015 5:32:00 PM

An important aspect of any product’s design is the engineering process, which has its own set of rules, codes, and languages. This is where GD&T is often used.

What is GD&T?

Geometric Dimensioning and Tolerance (GD&T) is a system for defining and communicating engineering tolerances on mechanical engineering drawings using a symbolic language. It is used in automotive, aerospace, electronic, and commercial industries to effectively communicate how to successfully manufacture products.

AIAG offers a range of courses, including [Basic GD&T](http://www.aiag.org/staticcontent/education/trainingindex.cfm?classcode=GDT) and [Advanced GD&T](http://www.aiag.org/staticcontent/education/trainingindex.cfm?classcode=GDTA) training, to familiarize you with GD&T and its uses.

Who would benefit from learning more about GD&T?

- Quality and layout personnel and support staff who must communicate with engineering and manufacturing, as well laboratory technicians who must perform gauging to layouts.
- Personnel from areas of product engineering, industrial engineering, and quality.

Being better acquainted with the terminology, the symbology, and the concepts of GD&T increases productivity and cooperation between departments and personnel. To learn more about course offerings and how AIAG can help your company improve, [download the 2015 Product and Training Catalog](https://go.aiag.org/2015-annual-product-catalog?hsLang=en-us).

photo credit: [Designer Toolbox, c. 1980](http://www.flickr.com/photos/55497864@N00/6031781280) via [photopin](http://photopin.com) [(license)](https://creativecommons.org/licenses/by/2.0/)

[View full post](https://blog.aiag.org/all-you-need-to-know-about-gdt)

```json
{
  "@context" : "http://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "AIAG"
  },
  "dateModified" : "2022-10-27T18:34:58.981Z",
  "datePublished" : "2015-06-24T17:32:00Z",
  "headline" : "All You Need to Know about GD&T",
  "image" : {
    "@type" : "ImageObject",
    "height" : 425,
    "url" : "http://cdn2.hubspot.net/hubfs/385656/BLOG/GCandT.jpg",
    "width" : 750
  },
  "mainEntityOfPage" : "https://blog.aiag.org/all-you-need-to-know-about-gdt",
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "height" : 60.0,
      "url" : "https://cdn2.hubspot.net/hub/385656/file-698753269.png/aiag_logo.png",
      "width" : 270.0
    },
    "name" : "Powering Performance"
  }
}
```