Automotive Industry

Automotive parts tolerance analysismotrized assembly tolerance analysis3d tolerance analysis software for parts assembly

Precision is the engine that drives reliability.  The application of CETOL 6σ in the automotive industry provides a powerful example of the successful use of Sigmetrix’s tolerance analysis and GD&T software solutions.
Applications include:

  • Powertrain
  • Chassis
  • Electrical
  • Interiors
  • Body/Vehicle Engineering


APPLICATION – Injector Axis

Objective: CETOL 6σ used to the design change required to shorten line for injector axis and to represent true length of feature.

automotive industry app

 For software demonstration or application specifics contact a GD&T specialist at Sigmetrix.

APPLICATION – Manifold Seals-V Block Engine

Objective: CETOL 6σ tolerance analysis software was used to evaluate clearance between critical features for head assembly and manifold sealing surfaces


– Highly non-linear assembly problem

– Consider joints biased in opposite directions to address “keystone” condition of the manifold between the heads
– Analyze sensitivities of assembly constraints and critical dimensions to key characteristic measurements including engine block fabrication tooling datums and manufacturing process steps

APPLICATION – Door Latch Assembly

Objective: See if application of CETOL 6σ software would shorten analysis time and save money


– Up to 60 hours per design on simple stack-up analyses. Conservative in tolerance application

– Multiple prototype iterations costs thousands of dollars and meant numerous weeks added to production time

– Door latch mechanism could potentially send a signal to the instrument panel that the latch on the door was locked when it was not; significant safety concern


– Less time spent on analysis
– Designs are free of surprises
– Able to relax tolerances in some areas
– Customers have increased confidence
– Able to deliver designs on-time
– Hundreds of thousands of dollars saved annually


Objective: Ensure correct performance of gearbox and beat competitors to market with a more innovative, higher-quality product

Results: CETOL 6σ allowed the customer to analyze the shift mechanism in one-third of the usual time. It also enabled prediction of failure modes, correct application of GD&T and improved design confidence and production time.

Software & Usage Training is provided by a highly skilled team of GD&T advisers. Contact us now for an online demo, or a meeting to analyze CETOL 6σ‘s implementation strategy for your engineering and design team.