Engineering essentials

Geometric dimensioning and tolerancing (GD&T): BS 8888 and ISO

Establish product quality, save money and reduce development time over the lifecycle of a product.

3 days

Next available:

Members: £1,495 + VAT
Non-members: £1,695 + VAT

Course Location & Date
Geometric dimensioning and tolerancing (GD&T): BS 8888 and ISO
£1,495.00 Plus vat
Non Members:
£1,695.00 Plus vat


Establish product quality, save money and reduce development time over the lifecycle of a product.

GD&T is recognised around the world as the only way of defining engineering drawings unambiguously. In an age where products are expected to be designed, manufactured and assembled by multi-functional teams working together across multiple continents the application of GD&T in ensuring product quality has never been more relevant . 

This course provides an essential understanding of the symbolic language of GD&T within the context of BS 8888 and ISO GPS standards. Newly updated to the latest BS 8888:2020 and ISO GPS standards, delegates will learn how GD&T is used to convey design intent, guarantee both assembly and function and, maximize tolerances.

Applied at the outset of a project GD&T can establish robust product quality, save months of development time, tens even hundreds of thousands of pounds, and potentially millions over the lifecycle of a product. 

The course is delivered by a dimensioning and tolerancing expert of over 20 years experience in multiple industries and, supported with demonstrations, animations, models, real parts, case studies, discussions, written exercises, questions and calculations. Intense but engaging it provides delegates with the hard skills needed to solve problems and make a real difference to product quality. 

Verified Logo
Verified by an engineer, Heather Lamming, CEng MIMechE
"Dave Masson had spent so long in industry at so many different companies with so many different products; he really does know the subject. This meant that the sometimes-abstract concepts covered in the course could be illustrated with real world examples that brought the ideas to life."
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Verified by an engineer, Lucy Weedon

"By the end of the course, I knew I understood the symbols and data, what the data was telling me, and how to make changes if something had failed. I am really satisfied with everything I’ve learned."
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Who should attend?

Design, development, manufacturing, assembly and quality engineers, CMM and CNC programmers, tool designers, toolmakers, technicians, inspectors, buyers and technical project managers. In short anyone who creates , reads or edits mechanical part drawings and models.

How will I benefit?

After the course you will be able to: 

  • Have an essential understanding of all the symbology used in BS 8888 and ISO GD&T and, how it's used to to meet design intent and remove ambiguity
  • Understand how the geometrical charactistics of features determine their functionality
  • Understand how datums and theoretically exact dimensions work, what they are for and how to select them
  • Understand the 14 types geometric tolerances, how they are related and what each one will control
  • Dimension and tolerance a feature to guarantee it will assemble with a mating part and provide additional tolerance in the process
  • Calculate tolerance zone boundaries
  • Understand how each and every one of an array of tolerance zone modifiers may used to increase or refine tolerance whilst ensuring the features meet their functional requirements
  • Understand how to dimension and tolerance patterns of features
  • Recognise the correct functional application of GD&T
Contributes 21 CPD hours

Key topics

  • Design intent
  • Fundamental principles of dimensioning and tolerancing
  • Size and the envelope requirement
  • The differences between +/- tolerancing and GD&T
  • TEDs, datums and constraint
  • The 14 geometric tolerances, their applications and tolerance zones
  • How to apply geometric tolerances
  • Guaranteeing the assembly of mating parts
  • Ways of modifying geometric tolerances
  • Edge conditions
  • Surface finish

Mapped against UK- SPEC competencies: A, B, C, D and E

  1. Knowledge and understanding - For Chartered Engineers: ‘Use a combination of general and specialist engineering knowledge and understanding to optimize the application of existing and emerging technology’ For Incorporated Engineers: ‘Use a combination of general and specialist mechanical engineering knowledge and understanding to apply existing and emerging technology’
  2. Design and development of processes, systems, services and products - For Chartered Engineers: ‘Apply appropriate theoretical and practical methods to the analysis and solution of mechanical engineering problems’ For Incorporated Engineers ‘Apply appropriate theoretical and practical methods to design, develop, manufacture, construct commission, operate, maintain, decommission and re-cycle mechanical engineering processes, systems, services and products’
  3. Responsibility, management or leadership - For Incorporated and Chartered Engineers: 'Provide Technical and commercial leadership’
  4. Communication and inter-personal skills - For Incorporated and Chartered Engineers: 'Demonstrate effective interpersonal skills’
  5. Professional commitment - For Incorporated and Chartered Engineers: ‘Demonstrate a personal commitment to professional standards, recognising obligations to society, the profession and the environment’

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At a glance

  • Duration:
    3 days
  • Location:
    Coventry, London
  • CPD Hours:
  • UK-Spec:
    A, B, C, D, E

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Available dates for Geometric dimensioning and tolerancing (GD&T): BS 8888 and ISO

3 day course

9-11 Jul 2024 SOLD OUT
17-19 Sep 2024 10% discount available until 17 July

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