Advanced Concepts of GD&T (2009) 2-day ET3016

This course teaches the advanced concepts of GD&T as prescribed in the ASME Y14.5-2009 Standard and offers an in-depth explanation of advanced GD&T topics not covered in our Fundamentals training.  Complex topics include expanded use of composite position and profile tolerances, customized datum reference frames, the translation modifier, and applying GD&T to non-rigid parts. Learning is enforced interactive engagement between the instructor and the students, followed with numerous exercises at the end of each chapter.

Each attendee receives a robust collection of learning resources including:
  • Advanced Concepts of GD&T coursebook (ASME Y14.5-2009)
  • A GD&T Ultimate Pocket Guide (2009)
  • 90-day access to Fundamentals of GD&T 2009 web training course 

Students who attend courses like this one walk away with more than knowledge. They gain on-the-job skills because the learning materials are performance-based and taught by experienced instructors who have applied GD&T in industry.

Learning Objectives

By attending this class, you will be able to:

  • Explain the concept of functional dimensioning
  • Describe advanced applications of form controls
  • Review and describe the uses, advantages, misconceptions, and common application errors of the datum system
  • Describe six additional datum feature types
  • Describe four complex datum feature types
  • Describe how to use the translation modifier and a customized datum reference frame
  • Review datum targets and understand expanded datum target concepts
  • Explain the difference between a rigid and a nonrigid (flexible) part
  • Describe the requirements for tolerancing parts measured in the restrained condition
  • Describe how datum targets and datum feature shift are used on restrained nonrigid parts
  • Describe the effects of simultaneous and separate requirements and how they apply to position tolerances
  • Explain multiple single-segment position tolerancing
  • Explain composite position tolerancing
  • Explain when to use profile tolerances
  • Describe the effects of simultaneous vs. separate requirements with profile
  • Explain multiple single-segment profile tolerancing
  • Explain composite profile tolerancing

Who Should Attend

This course is valuable for individuals who create or interpret engineering drawings, product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/professionals; CMM operators; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals.


Please be aware that this is not an introductory course. In order to understand the course content, students should have completed the Fundamentals of GD&T course or equivalent.


You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

Functional Dimensioning

  • Understand the functional dimensioning process and its

Advanced Application of Form Controls

  • Flatness refining notes
  • Flatness and straightness per unit basis
  • The AVG modifier with circularity
  • Applying cylindricity to a portion of a feature

Overview of the Datum System 

  • When to use the datum system
  • Advantages and common misconceptions of the datum system
  • Common errors in datum application

Additional Datum Feature Types

  • Six additional datum feature types
  • Degrees of freedom each datum feature type constrains
  • Default conditions and overriding defaults for threaded features used as datum features
  • Features of gears or splines used as a datum feature
  • Temporary and permanent datum features

Complex Datum Feature Types

  • Four complex datum feature types and the number of degrees of freedom each datum feature type constrains
  • Multiple datum features and patterns used with complex datum features

Translation Modifier

  • Datum precedence as it relates to degrees of freedom (DOF)
  • Requirements for using the translation modifier

Customized Datum Reference Frame (CDRF) and Datum Targets

  • Overriding the DOF constrained by a datum feature using CDRF
  • Requirements for using a customized datum reference frame (CDRF)

  Datum Target Overview and Expanded Concepts 

  • How datum target support repeatable measurements
  • Datum target selection and how it affects function, downstream users and tooling costs
  • Datum targets used to support nonrigid and countered parts
  • Moveable datum target uses and requirements

Rigid and Non-Rigid Parts Definitions

  • Free state condition
  • Restrained condition
  • Rigid part
  • Non-rigid part and non-rigid part features

Datum Target Usage on Restrained Parts

  • Multiple datum targets used on a nonrigid part
  • Datum feature shift on a restrained part

Simultaneous and Separate Requirements

  • Recognize where simultaneous requirements apply
  • Effects of a simultaneous requirements vs separate requirements
  • Simultaneous requirements with datum references at RMB and LMB for profile and position tolerances
  • Tolerance of position as separate requirements
  • Simultaneous requirement exception

Multiple Single-Segment Position Tolerancing

  • When to use it,  rules, and advantages
  • Multiple single-segment position tolerances vs. composite position tolerances

Composite Position Tolerancing

  • “FRTZF” and “PLTZF”
  • When to use it, rules, and advantages

Profile Tolerances

  • Misconceptions about profile tolerances
  • Five profile applications
  • Profile applied to complex features
  • Affects of a profile tolerance
  • Self-datum reference
  • Applied to coplanar and offset surfaces
  • Non-uniform profile tolerance
  • Combining profile with other geometric tolerances
  • Profile with MMB datum feature references

Simultaneous and Separate Requirements with Profile

  • Simultaneous requirement applied to profile
  • Profile tolerances with separate requirements

Multiple Single-Segment Profile Tolerancing

  • When to use it, rules, and advantages

Composite Profile Tolerancing

  • When to use it, rules, and advantages 



All SAE GD&T instructors are industry professionals with years of experience applying GD&T on the job. Our trainers have:

  • Expert knowledge of the Y14.5 Standard
  • ASME certified and/or ASQ certified
  • Current or recent industrial experience using GD&T 
  • At least five years experience using GD&T
  • Experience and skill using ETI teaching materials

Our instructors use identical training materials and lesson plans, so you receive the same class presentation from every trainer.

Duration: 2 Days
CEUs: 1.3

Format: Virtual

Event ID: 6788

Location: Live Online

Session Info:

  • Session 1 - April 20 (8:30 a.m. - 4:30 p.m. ET)
  • Session 2 - April 21 (8:30 a.m. - 4:30 p.m. ET)
    2 Sessions

  • Fees: $1299.00

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