GD&T analysis

Geometrical dimensioning and tolerancing

Effective communication and consistent measurement across all engineering disciplines and processes are fundamental to the design and manufacturing of the highest quality products. GD&T is crucial to achieving these goals.

As a tool, GD&T has been used in the automotive, aerospace, electronics, commercial design, and other manufacturing industries for the last few decades to improve product quality. Its use has grown in tandem with the industries’ move from mechanical drawings to digital design.

GD&T ensures that parts fit and function properly. It is a symbolic language to perfectly capture the design intent.


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Manage part complexity with Metrolog X4 GD&T processing engine

How GD&T can improve your quality control

More GD&T are currently embedded into CAD files with Product Manufacturing Information (PMI). Not only do quality engineers have to access these data sets, but they also need to decode the engineering intent. Additionally, international GD&T standards keep evolving adding rooms for interpretation and costly errors.

Our Metrolog X4 software provides a comprehensive set of GD&T tools to intelligently guide the user through an effective workflow with precise understanding of the state of the part, possible sources of stack-up errors in assemblies by simultaneously working with many results, and obtaining sharp and usable information from the analysis.

The hands-on approach of advanced algorithms and calculation methods makes GD&T easy to master for busy engineers who have many other responsibilities or users without extensive GD&T proficiency.


Ensure inspection consistency

Metrolog currently support the following CAD files embedded with PMI:

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Increase production rates

Metrolog has a GD&T processing engine for handling the most complex cases in record time.

NIST-PTB certified results give you the confidence to inspect accurately and quickly. Metrolog features allow you to shape reliable and consistent inspections with total traceability throughout the entire process.

The Metrolog engine allows deleting intermediate steps; no need any more for operator to know which algorithm or constraints need to be apply to such feature or datum. Metrolog will handle it automatically in respect to standard requirements. When evaluating a GD&T in Metrolog, Datum reference frame (DRF) are automatically created; degrees of freedom are automatically selected depending on DRF, avoiding possible user interpretation errors. Optimization is also carried depending on tolerances zone shape.

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Ensure all aspects of manufacturing, from engineering to final inspection, are performing to their full potential in producing good parts quickly and inexpensively.

Reduce scrap and rework

Metrolog provides stunning GD&T report capabilities:

  • Table results with numerical values, go no go states…
  • Graphical views with labels presenting results of GD&T calculation next to the GDT cartridge…
  • In addition, provide many dedicated detailed views to illustrate the GD&T results. Those details view are readable and very useful for machining operator to show them where, why and how to setup/adjust correction to their production machine.

Metrolog GD&T engine can handle both ASME and ISO standards.



Updated Thursday April 9th, 2020


In these times of change, we need to be proactive and adapt to a world that will be different.  Not only does this apply to us as a technological company but most importantly to our customers who will grow different set of expectations. More than ever, time has come to step up to evolving market demands: we are committed to implementing radical changes to support our end-users. Starting today.


Updated Tuesday March 17th, 2020


At Metrologic Group, safety is our number one priority. We are committed to providing you with the best possible customer experience while protecting our staff. As of Tuesday March 17th noon France is in partial lockdown and we will be applying government mandatory measures.  All of our team is able to operate and work remotely in secured locations.

Preventing the further spread of COVID-19 is a shared responsibility for us all.

We are monitoring and enforcing all guidelines set out by local governments in the countries in which we operate, whether related to local requirements, general hygiene or to travel restrictions.

During this time, we are doing our best to maintain 100% of our technical support services by phone, email or remote assistance.  If you have any technical problems using our solution or need simple assistance, you can contact us normally through the usual channels and locally available phone numbers:


  • • Technical Support: hotline [at]  (replace [at] by @)
  • • Find and contact your local support
  • • Technical Support for France Hotline Direct Access Number: +33-476-043-033
  • • Or locate your nearest Subsidiary/resseller for local support.
  • • General or Commercial Inquiries: +33-476-043-030
  • • Extranet Link


Trainings, on-site assistance and business trips are cancelled until further notice.

However, our team of experts is available to perform virtual/remote training to support your needs:  contact your local focal to learn more on how we have adpated to the situation to keep providing training on our full range of software solutions.

We will continue to keep you informed as we go along and we invite you to regularly consult this page for the latest information.


Thank you and stay safe,

The Metrologic Group Team

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