training & development
PD449 - Mechanical Tolerancing for Six Sigma

PD449 - Mechanical Tolerancing for Six Sigma

Pricing and Availability

Pricing and dates are pending, please check back.



This two-day course teaches participants how to solve assembly stacks using both traditional and Six Sigma methods. We highlight the design risks that are associated with the classical methods of tolerance analysis, and introduce Six Sigma methods that will eliminate these risks.

The goal of the Six Sigma techniques is to teach the participants how to assess the manufacturing and design risk of their tolerances. This risk is quantified in terms of manufacturing defects and assembly defects. These methods are unique because they allow the participants to optimize their designs by making trade-offs between assembly defects and manufacturing defects.

This is a lecture course, with many opportunities for participants to work on problems. We walk the participants through each of the tolerance analysis and allocation methods.  After they master each method, we show them an Excel® spreadsheet that automates each method. This course is unique because it teaches participants to apply Six Sigma techniques to predict their design and manufacturing risk before they build parts.

Participants receive an Excel® spreadsheet to automate the tolerance analysis and allocation methods and a participant guide as a hands-on reference.

Special Requirements
It is recommended that participants bring a laptop, which has the Excel® software loaded onto it.  Additionally, participants must bring a calculator with square and square root functions.

You Will Learn To
 - Create one-dimensional loop diagrams
 - Explain the development of assembly requirement equations
 - Conduct an analysis of mechanical assembly requirements using Worst Case (WC), Root Sum of the Squares (RSS), and Modified Root Sum of the Squares (MRSS) methods
 - Document risks associated with using the WC, RSS, and MRSS analysis methods
 - Describe the analysis of Geometric Dimensioning & Tolerancing (GD&T) controls in a tolerance analysis
 - Describe the allocation of mechanical tolerances based on process capabilities using WC and Six Sigma statistical methods
 - Provide estimates of manufacturing piecepart defect rates and assembly tolerance defect rates
 - Use MechTOLTM Lite spreadsheet to automate tolerance analysis and allocation processes

Please click HERE to view the course outline.

Who Should Attend
This course is for anyone who is responsible for putting tolerances on mechanical drawings.  This includes:
 - Mechanical design engineers
 - Drafting designers
 - Fabrication engineers
 - Assembly engineers
 - Quality engineers

For venue information, please click HERE.

  • Course Type: Public Course
  • Course Number: PD449
  • Language: English
Final invoices will include applicable sales and use tax.


Paul Drake developed the successful application of Six Sigma mechanical processes at Raytheon Systems Company, where he co-managed the Mechanical Tolerancing and Performance Sigma Center for Excellence. Mr. Drake is an ASME certified senior level geometric dimensioning and tolerancing professional, a registered professional engineer and has earned a Six Sigma Blackbelt.
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