Tolerance

In the world of manufacturing, nothing can be manufactured or built to perfection. It is the work of the designer or engineer to look at the parts, and determine how precise they have to be to still function.

A tolerance is a range of how far a true measurement can range from what's intended. In other words, it is The maximum allowable deviation from a specified standard, as the range of variation permitted, expressed in actual values, or more often as a percentage of the nominal value. Creating a tolerance requires in depth knowledge of the function within a system, and what would happen if it was below the specified tolerance. There are two major tolerances that are important to consider: a physical measurement (dimension) or an attribute (time, temperature, sound level).