Week 9: Tolerance Analysis, Part 1

"The details are not the details, they make the design." -Charles Eames

Week 9 Summary

For Week 9 of the HPS program, the participants were instructed on the various steps to take when performing a tolerance analysis. The first steps of this analysis would be to make a problem statement and make a tolerance analysis (TA) loop map to describe the effect each component has on the gap size expected in the area inspected. The next step includes listing the assumptions regarding how each component acts to adjacent parts and writing out the tolerance loop based upon how each component contributes to the upper and lower specification limits. The final two steps include making assumptions based upon the combined component tolerances and evaluating the results of the worst case and root sum square tolerance.


Example of dimensions for tolerance analysis of a gap.

Tolerance Analysis Cases

I chose three different cases to analyze for my product for the tolerance analysis. Each of these cases includes an expected gap to account for. Below are the charts displaying the tolerance analysis of the three areas.


Tolerance Analysis Case #1
Rear gap between circuit cover and back cover.


Tolerance Analysis Case #2
Bottom screw setup for front/back covers and bottom case.


Tolerance Analysis Case #3
Gap between AIY speaker and upper case for the rubber sheet.

Google HPS Product Representation

All of what is depicted is representative of the work one would expect from the Google Hardware Product Sprint Program. All educational content depicted belongs to Google.

Made with CSS and HTML5.

Copyright 2021. All rights reserved.