This textbook teaches how to apply statistics to tolerance stacks. Topics covered include RSS, modified RSS, Monte Carlo, applying capability, specifying capability on the face of drawings, sub stacks, contributors in statistical stacks, defects per million parts vs. defects per million assemblies. The textbook includes exercises and complete solutions for the exercises
You can purchase a pdf version of the textbook by following the link below
A customer testimonial: 

Hi David,

I just want to say thank you for your stats tolerance stack PDF. It has truly helped me to understand the fundamental correlation between tolerance stackups and process capability. The other books and sources I  have used didnt bother to give a derivation of the formula which I think is extremely fundamental to understanding tolerance stackups. I want to truly say thank you. Tolerance stackups is so much deeper than just the RSS formula - it is about understanding quality as a whole and understanding how the process performs to meet the required specifications, many sources fail to explain this!!

Thanks Again - I now know tolerance stacks to a greater level!

Tomisin O