Sigmetrix helps enterprise leaders build higher quality, cost effective solutions—faster than ever before. 

    Our comprehensive solutions are trusted by teams across the enterprise in a variety of industries to help identify mechanical variation faster, resulting in more efficient processes and more cost-effective products


      How We Help

      Produce higher-quality, cost-effective products across the enterprise.

      Who We Help

      Solutions for manufacturers, engineers, and designers in a variety of industries.

      Where We Help

      Build better products and processes across the enterprise. 

      Robust solutions that streamline and enhance the mechanical variation management process.

      Our tolerance analysis and GD&T solutions  unite the ideal world of product design with the real world of manufacturing and assembly—where mechanical variation has a significant impact on product cost.



        Tolerance Analysis

        Predict, manage, and optimize mechanical variations.


        Understand permissible variation earlier in the design process.

        Model-Based Definition

        Optimize tolerances within 3D models.

        Meet the Team

        We've been helping build better products for 25+ years. 

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        We integrate directly with several major CAD platforms.

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        Tolerance analysis and GD&T solutions for a variety of industries worldwide.

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        Resources to help you better manage mechanical variation. 

        Case studies, whitepapers, webinars, and more resources backed by our tolerance analysis and GD&T experts.


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          Learn how you can produce better products, reduce development costs, and more.


          We publish frequently on mechanical variation management, GD&T best practices, and more.

          Press Releases

          CETOL 6σ v11.5 3D Tolerance Analysis Software Now Available from Sigmetrix

          2 Minute Read

          CETOL 6σ v11.5 tolerance analysis software adds improved support for inseparable assemblies and ease of use.  

          MCKINNEY, Texas –February 20, 2024— Sigmetrix, experts in mechanical variation management, announced their latest version of CETOL 6σ tolerance analysis software, version 11.5, is now available for immediate download. Tolerance analysis benefits businesses in many ways. It helps improve profitability by balancing quality with manufacturing cost. Companies can also realize faster time to market by reducing the need for additional design and prototype cycles. Finally, it allows companies to gain confidence in their product and process decisions before making costly investments.

          CETOL 6σ enables product development teams to understand the often-complex impact of dimensional and assembly variation easily and fully on their designs. This knowledge enables them to make the proper adjustments before problems appear in manufacturing or, even worse, in their customers’ hands. Users of all expertise levels will appreciate the multiple levels of assistance available within the software. This new version of CETOL 6σ builds upon the powerful features already in place and adds many improvements, including: 

           Inseparable Assemblies: 

          • Users can now indicate that an assembly is inseparable in the CETOL 6σ model, in which case the software treats the assembly as a part. No changes to the CAD model are required. 

          {Optional and only available for PTC Creo) Create Feature Annotations from Tolerancing Information First Defined within CETOL: 

          • This optional feature supports alternative workflows in which CETOL 6σ is used earlier in the design process to help determine datum features, datum reference frames, and appropriate tolerance types and values based on the function of the part in the context of the entire assembly. Once the user completes the definition of the dimensioning schema in the CETOL 6σ model, the software will automatically create the associated semantic annotations, also referred to as Product Manufacturing Information, or PMI, in the part files that can also be shown on the drawings.

          Several Enhancements to Improved Ease of Use:  

          • Add geometric tolerance to multiple features – You can select multiple features and then apply the geometric tolerance to each of the selected features.  
          •  You can select multiple size dimensions, non-size dimensions, or geometric tolerances and modify their properties all at once. 
          •  The values for all tolerances for the selected part are reset to the default values (as defined on the Variation Defaults tab in Options). 
          •  Now there is an optional notification window that pops up when there is a loss of synchronization with the CAD model. 

          As with prior releases, CETOL 6σ v11.5 is available in English, Japanese, and Simplified Chinese. 

          Sigmetrix President and CEO, James Stoddard states, “we are excited to release CETOL 6σ v11.5 to the market. We feel this release is a major step forward in ease of use, supporting our larger solution strategy.  We feel confident that companies will see improvements in their journey to build better products through mechanical variation management.”

           A short webinar of this new CETOL version is coming soon!

          Sigmetrix’s comprehensive, integrated portfolio includes other products and services including: 

          • CETOL 6σ, a 3D tolerance analysis solution that works directly with NX, SOLIDWORKS, PTC Creo and CATIA V5-6 models. 
          • EZtol, a 1D tolerance analysis software that works directly with NX, SOLIDWORKS, and CATIA V5-6 models. The same technology is used in PTC Creo’s EZ Tolerance Analysis (EZTA) tool and Autodesk Inventor’s Tolerance Analysis tool. 
          • GD&T Advisor, an interactive tool that provides expert guidance on the correct application of GD&T within the PTC Creo and Autodesk Inventor environments. 
          • Training provided through more than a dozen instructor-led and computer-based courses covering basic to advanced GD&T/GPS, MBE, tolerance analysis, and instructional courses for software developed by Sigmetrix. 
          • Consulting and Implementation services team with years of experience in tolerance analysis and GD&T definition offers a variety of consulting services to augment your team, speed your project along and run analyses for your assemblies. 

          Learn more at and

          About Sigmetrix 
          Sigmetrix has been helping companies produce better solutions for 25 years through a combination of software solutions, training, and consulting services that focus on managing the impact of mechanical variation. For more information, visit their website at  

          Sigmetrix Team

          Sigmetrix Team

          For more than 30 years, we’ve developed innovative software solutions to help enterprises produce better products. Our expertise helps companies ensure design intent aligns with manufacturing processes, enabling companies to achieve higher quality and efficiency in product development and manufacturing.