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. 

        Our Partners

        We integrate directly with several major CAD platforms.

        Global Reach

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

        Join Our Team

        Join the brightest, most talented, and most motivated teammates. 

        Resources to help you better manage mechanical variation. 

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


          Resource Center

          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.

          Hands-On, Targeted Training, Geared to Your Unique Environment

          Sigmetrix offers training focused on the subjects of:  

          • GD&T 
          • Tolerance analysis 
          • MBD / MBE 

          All these courses are presented with the big picture in mind, considering the inter-relationship between Design, Manufacturing, Inspection (QA/QC), Assembly, Service, Purchasing and all other facets of the Design/Manufacturing continuum.  Instructors will lead your staff through the required levels of training supplemented by examples, exercises, and applications based on your products and processes. This provides the well-rounded understanding your staff needs for your firm to compete in today’s competitive global marketplace.

          Additionally, Sigmetrix provides software training to ensure proficiency with your dimensional management software including courses for: 

          • CETOL 6σ 
          • EZtol
          • EZTA for Creo ®
          • GD&T Advisor for Creo ® 

          Our engineers bring tolerance analysis and GD&T application knowledge to your environment to blend subject-matter, software expertise, and practical application to your products.

          We go beyond initial training to address complex design challenges, critical deadlines and implementation strategies that work for your product development process. 

          Erich Zwettler
          Erich is an expert-level trainer and practitioner of GD&T, having learned and honed his skills in the Automotive and Aerospace industries prior to joining Sigmetrix. His career started with 4 years as a Product Engineer with Dura Automotive Systems, designing manual seat adjuster mechanisms. Then, he spent 12 years with Rolls-Royce Corporation, checking, training, and consulting on GD&T, writing specifications and standards, and helping to clarify drawing interpretation globally.
          Marius Zvolinschi
          Marius is an expert-level CETOL practitioner and trainer, having learned and honed his skills in the Heavy Equipment Industry prior to joining Sigmetrix. Upon graduating from Transylvania University of Brasov, Romania with a Mechanical Engineering degree, Marius worked as a Product Engineer for a Romanian consultancy company on several Caterpillar design projects.
          Dan Lange
          Dan is an expert-level user and instructor for tolerance analysis software and methods including CETOL 6σ, EZ Tolerance Analysis, and EZtol. With an Industrial Engineering degree from Purdue University, he began his career at Eastman Kodak in assembly operations optimizing throughput and leading multi-discipline problem-solving teams. After 7 years in assembly operations, Dan transitioned into a customer-facing role as a sales and technical specialist.
          Jesse Zahner
          With an extensive background in Model-Based Enterprise, Jesse serves as a voice on Sigmetrix’s MBE efforts. Coming to Sigmetrix with a Master’s in Product Lifecycle Management from Purdue, along with prior experience at Elysium and Boeing, he helps guide product enhancement and delivery. As a student of the piano, Jesse brings the rigor of practicing music to his work at Sigmetrix.

          Resources to Help You Master Mechanical Variation Management

          Get case studies, whitepapers, and more resources backed by our tolerance analysis and GD&T experts. Learn exactly how you can produce better products, reduce development costs, and make your processes more efficient.

          Expert Webinar Series

          The Expert Webinar Series content is developed to answer many of the common questions and misunderstandings related to all things related to mechanical variation, MBD, GD&T, tolerance analysis, dimensional management and more. Our ongoing webinars are designed to deliver superior content with no travel costs. Participants interact directly with our experts and consultants, as well as some customer and partner subject matter experts on crucial topics to enhance expertise. Webinars are recorded and archived for convenient on-demand access.

          EZtol 2.3 is fast and easy to use. See how in this webinar.
          Join us for our webinar to see how this latest release extends EZtol’s advantages over spreadsheets!
          The webinar will provide a demonstration our newest version of CETOL 6σ, v11.
          Join us for our webinar to see how this latest release extends EZtol’s advantages over spreadsheets!
          We all like to think we can tolerance our parts in accordance with ASME Y14.5, but the tolerancing game isn’t always as easy as it seems! Join us at the Home Edition event to view the 1st and 2nd place winning submissions.
          This webinar will introduce users of Autodesk Inventor to Sigmetrix’s 3D tolerance analysis tool, CETOL 6σ.
          EZtol is a tolerance analysis program focused on simplifying the definition of tolerance stackups most commonly performed using spreadsheets.
          This one hour investment of your time will help you understand how companies in all industries are using CETOL 6σ to create designs that optimize the balance of high quality at low costs.
          We will be discussing GD&T/GPS adoption rate, investment, and perceived value based on a number of market segments
          If your company is struggling with GD&T, please join us for this webinar. We’ll get you pointed in the right direction.
          This presentation will cover CETOL 6σ Visualize Sensitivities functionality using simple and advanced use cases.
          Is GD&T important for new graduates to know, or is GD&T something that is only necessary further in one’s career?
          We’ve gathered an all-star team of MBD experts to answer any of your MBD-related questions!
          In this webinar we will dig into some the technical aspects of the assembly constraint modeling used by CETOL and why it is important for proper tolerance analysis.
          Join Sigmetrix for the answers to these and other questions with a discussion on the relationship between GD&T and MBD.
          Why is MBE important? How does MBD fit into a digital enterprise? Why does it matter?!