Tolerance analysis is a name given to a number of approaches used today in product design to understand how imperfections in parts as they are manufactured, and in assemblies as they are put together, affect the capability of a product to meet customer expectations.
Also know, how is tolerance determined?
The assembly yield is the quality level. It is the percent of assemblies which meet the engineering tolerance requirements. It is calculated by summing the component tolerances to determine the assembly variation, then applying the upper and lower spec limits to the calculated assembly distribution.
What is fit and tolerance?
'The extreme permissible values of a dimension are known as limits. The degree of tightness or looseness between two mating parts that are intended to act together is known as the fit of the parts. Tolerance on the other hand is the total amount that a specific dimension is permitted to vary.
Why are tolerances important?
Tolerance optimization during design has a positive impact on the yields coming out of manufacturing, and better yields directly affect product cost and quality. Analyzing tolerances and variations before trying to produce a product also helps engineers avoid time-consuming iterations late in the design cycle.