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Advanced Geometric Dimensioning and Tolerancing


Advanced Geometric Dimensioning and Tolerancing is taught in a problem solving team format that will stimulate discussion and provide participants with the tolerancing tools and techniques to:

  • Design and interpret drawings requiring complex GD&T concepts
  • Focus on practical applications of GD&T for mating parts
  • Communicate design intent to persons in manufacturing and inspection

Preview the Advanced Geometric Dimensioning and Tolerancing Course Introduction (pdf)


Participants will be able to properly apply and interpret:

  • Complex datum features
  • Composite positional tolerancing
  • Multiple single–segment positional tolerancing
  • Fixed and floating fasteners
  • Multiple patterns of features located to common datum features
  • Pattern of features located to a common datum feature of size
  • Bidirectional positional tolerancing
  • Coaxial positional tolerancing
  • Profile control of form, orientation, and location
  • Graphic analysis of composite positional tolerancing and patterns of features located to common datum features of size


  • Mechanical Engineers
  • Design Engineers
  • Quality Engineers
  • Manufacturing Engineers
  • Quality Inspectors
  • Anyone who is required to produce or interpret engineering drawings


  1. Introduction
  2. Datum Features
    1. Implied datum features
    2. Features of size
    3. Inclined datum features
    4. Multiple datum features
    5. Coplanar datums features
    6. Partial surface as a datum feature
  3. Composite Positional Tolerancing
    1. Primary datum reference repeated
    2. Primary and secondary datum references repeated
    3. Multiple single–segment feature control frames
  4. Fasteners
    1. Floating fasteners
    2. Fixed fasteners
    3. Fasteners at zero positional tolerance
  5. Multiple Patterns of Features Located to Common Datum Features
    1. Datum–to–pattern relationship
    2. Feature–to–feature relationship
    3. Inspection requirements
    4. Separate and simultaneous requirements
  6. Pattern of Features Located to a Common Datum Feature of Size Controlled by a Geometric Tolerance
    1. Shift tolerance from datum features of size at MMC
    2. Inspection requirements
  7. Bidirectional Positional Tolerance
    1. Rectangular coordinate method
    2. Polar coordinate method
    3. Noncircular features
  8. Coaxial Positional Tolerancing
    1. Coaxial plug and socket
    2. Coaxial holes the same size
    3. Coaxial holes the same size and parallel
    4. Coaxial holes of different size
  9. Profile
    1. A form control
    2. A form and orientation control
    3. A form, orientation, and location control
  10. Graphic Analysis
    1. Composite positional tolerancing
    2. Pattern of features located to common datum features of size controlled by a geometric tolerance