Course catalog 2024

ISO-GPS (Geometrical Product Specification) and tolerance analysis

Course category





18 hours [3 days / 6 hours]


9.00 - 12.00 | 14.00 - 17.00




Enrico Boesso


Tolerance management during the product development process is based on a method called “Dimensional Management”. It defines the activities and their sequence to obtain the desired quality at the lowest possible cost through the management of mechanical variations.
ISO-GPS is a standardized technical language that enables the robust practical application of Dimensional Management through functional description of the dimensional/geometric requirements and unambiguous specifications. Its prescriptions are used to describe the dimensional and geometric variations that can be accepted in the production of a single component, it clearly indicates what you need to measure and allows to explicitly control all the aspects of such variations.
Tolerance analysis is the only possible way to understand if the “as designed” tolerances values are too large (poor quality) or too small (unnecessary demand for high process capability) to optimize them finding a balance between these two conflictual requirements.

Learning Outcomes

  • Understanding how Dimensional Management can improve the quality of products and the effectiveness of manufacturing processes.
  • Discover how ISO-GPS can reduce scraps and inefficiencies due to poor specifications.
  • Gain insight into and appreciate how ISO-GPS can provide a competitive advantage to your organization.

Target Audience

  • Design: creation of functional drawings, tolerance chain calculations, non-compliance management.
  • Industrialization: interpretation of functional drawings, creation of manufacturing specifications.
  • Procurement - Supply chain: relationships/negotiations with and scouting of suppliers.
  • Quality: dimensional checks according to functional requirements.


Experience in technical drawings management could be useful, but not mandatory.


The training program includes:

Introduction to Dimensional Management

ISO-GPS (Geometrical Product Specification)

  • Basic definition and tools.
  • Comparison between functional dimensioning & tolerancing and coordinate tolerancing: benefits of geometric functional dimensioning.
  • Envelope principle (ISO 8015) VS independence principle (ASME Y14.5): impacts on dimensional controls.
  • Datum Systems, datum features and datum targets.
  • Correct interpretation of the Geometric tolerances: straightness, flatness, circularity, cylindricity, profile of a line, profile of a surface, angularity, perpendicularity, parallelism, position, concentricity/coaxiality, symmetry, circular runout and total runout.
  • Maximum material condition – Least material condition: their application and interpretation, practical effect of the use of material modifiers in the variation of the width of the permissible tolerance zone, impact on the calculations of the tolerance chains.
  • ISO 10579 - “Non – rigid” parts.

Introduction to tolerance analysis

  • Product requirements: evaluation of the assemblability and functionality.
  • Metrics to quantify quality of the design: Cp, Cpk, DPMU, σ.
  • Basic notions of statistics applied to tolerance analysis.
  • Different approaches to calculation: worst case, RSS, statistic. Differences, limits and advantages.
  • Increasing project quality: contribution and sensitivity analysis for smart corrective actions. Correlation matrix. Introduction to tolerance optimization.
  • Tutorial: Setup of a 3D tolerance analysis, calculation, results interpretation and definition of the corrective actions.

Training on demand: please contact us!

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You will receive a personalized offer for each course, based on your preferred delivery method (live online, in person in one of our classrooms or in-house at your company), and requirements (number of participants, curriculum, level and technology).

Delivery method

Dates, times and provision methods (live online, in person in our facilities or in-house at your premises) will be agreed with the customer: the information provided in the course overviews is merely indicative.

For live online courses, we use a web platform that does not require installation of local software. It enables participation in the sessions via Mac, PC or any mobile device. The EnginSoft Training Secretariat will send the participation link and credentials to the individual trainees.

Training Secretariat

Silvia Galtarossa
Ph. +39 049 770 5311 |

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