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Design a Class Infusion Project of ASME Geometric Dimensioning and Tolerancing Standard

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2020 ASEE Virtual Annual Conference Content Access


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Publication Date

June 22, 2020

Start Date

June 22, 2020

End Date

June 26, 2021

Conference Session

Capstone/ET Projects III - Mechanical and Manufacturing Focus

Tagged Division

Engineering Technology

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Paper Authors


Cheng Y. Lin P.E. Old Dominion University

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Dr. Lin is a Professor of Mechanical Engineering Technology at Old Dominion University. He received his PhD of Mechanical Engineering from Texas A&M University in 1989, and is a registered Professional Engineer in Virginia. Dr. Lin has expertise in automation control, machine design, CAD/CAM, CNC, geometric dimensioning and tolerancing, and robotics. He has been active in the technology application research and teaching training courses for the local industries and technology application center

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Hamid Eisazadeh Old Dominion University

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Dr. Hamid Eisazadeh is an Assistant Professor of Mechanical Engineering Technology at Old Dominion University. Dr. Eisazadeh has more than 12 years of experience in education, having taught at Clarkson University and Chabahar Maritime University. His engineering experience includes manufacturing, welding, additive manufacturing. He has been lecturing Introduction to Welding Processes, Manufacturing Processes, Material Science, and Additive Manufacturing courses.

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Alok K. Verma P.E. Old Dominion University

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Dr. Alok K. Verma is Ray Ferrari Professor at Old Dominion University. Dr. Verma received his B.S. in Aeronautical Engineering from the famed institution IIT Kanpur, MS in Engineering Mechanics and PhD in Mechanical Engineering from ODU. Prof. Verma is a licensed professional engineer in the state of Virginia, a certified manufacturing engineer and has certifications in Lean Manufacturing and Six Sigma. He has organized several international conferences as General Chair, including ICAM-2006 and ICAM-1999 and also serves as associate editor for three International Journals. Dr. Verma’s scholarly publications include more than 87 journal articles and papers in conference proceedings and over 50 technical reports. He has served as a PI or Co-PI on several funded competitive grants exceeding $4.0 million from agencies like NSF, DOE, NSRP etc. He is well known internationally and has been invited to deliver keynote addresses and invited papers at more than 12 national and international conferences. Dr. Verma has received the Regional Alumni Award for Excellence for contribution to Lean Manufacturing research, International Education Award at ODU and Ben Sparks Medal by the American Society of Mechanical Engineers (ASME). He is active in ASME, American Society for Engineering Education (ASEE) and Society of Manufacturing Engineers (SME). Alok was active in ASEE during eighties and nineties and was instrumental in organizing the ETLI institute at ODU with Prof. Gary Crossman. Dr. Verma has served the Hampton Roads community as board member of several non-profit organizations like Norfolk Sister City Association, World Affairs Council and Asian Indians of Hampton Roads.

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Design a Class Infusion Project of ASME Geometric Dimensioning and Tolerancing Standard

As both mechanical engineering (ME) and mechanical engineering technology (MET) students need to have the knowledge of designing a product, it is critical for them to be aware of the GD&T standards developed by the American Society of Mechanical Engineering (ASME). ASME offers standards across a wide range of topics, including pressure technology, power plants, elevators, construction equipment, piping, nuclear components, and geometric dimensioning and tolerancing (GD&T) etc. Application of these ASME Standards in the design is important for both the quality and safety of a product.

This paper describes the development of a short course in Geometric Dimensioning and tolerancing titled: “Introduction to ASME Geometric Dimensioning and Tolerancing (GD&T) Standard” designed for ME/MET freshman/sophomore classes. The motivation for the development of this course came from the ASME Vision 2030 survey which identified key areas lacking in the engineering curriculum. This development project was assisted and validated by an ASME Standards and Certification Engineer and was jointly sponsored by the ASME Committee on Engineering Education and the ASME Council on Standards and Certification. GD&T uses a symbolic language to improve the communication for designers, manufacturers, and inspectors. A part function can be fully and concisely described when using the standard correctly. Therefore, many companies are migrating their conventional drawings using coordinate tolerancing to GD&T drawings. Having knowledge of the standard will certainly help students in their design capability and future career development.

One of the goals of this project was to infuse GD&T concepts within existing engineering courses using short modules. A short twenty-five-minute PowerPoint presentations were developed covering the following topics:

a. Traditional dimensions and tolerances. b. Types of traditional tolerances. c. An interesting example/problem of stacked tolerance. d. Inadequateness of traditional dimensions & tolerances. e. GD&T symbols and GD&T standards.

To assess the performance of the project, an instrument was developed with multiple-choice problems. In addition a survey consisting of four questions was conducted among the students: (1) This topic presents a clear description of traditional dimensions and tolerances, (2) Explanation of a stacked tolerance is clear, (3) The reasons of “why GD&T?” is clear, and (4) Definition of GD&T standards is clear.

The survey was given to students in a manufacturing-process course. Results of the survey are presented below:

a. 94% students agree or strongly agree that a clear description of traditional dimensions and tolerances is well addressed. b. 94% students agree or strongly agree that the stacked tolerance is well addressed. c. 88% students agree or strongly agree that “why GD&T?” is clearly addressed. d. 100% students agree or strongly agree that definition of GD&T standard is clear. e. Students received an 84% test average in multiple choice problem assessment.

The module is available at the ASME Dropbox and the developers are seeking other colleges to promote the project and participate the field test.

Lin, C. Y., & Eisazadeh, H., & Verma, A. K. (2020, June), Design a Class Infusion Project of ASME Geometric Dimensioning and Tolerancing Standard Paper presented at 2020 ASEE Virtual Annual Conference Content Access, Virtual On line . 10.18260/1-2--34383

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