Type Ii Error
Meaning ~ Probability of accepting an incoming shipment of manufactured goods that exceeds the maximum allowable defect rate, exposing the buyer to assembly line failures.
Manufacturing Tolerance
Meaning
Permissible variations define the allowable limits of size, weight, or other physical properties of a finished component. This variance, called the manufacturing tolerance, is specified by engineers to ensure that parts fit together and function correctly. It recognizes that perfect precision is impossible in mass production.
Design Parameter
Industrial drawings show the target dimensions and the allowed deviation above and below that value. Setting a tight manufacturing tolerance increases the cost of production because it requires more precise machinery and more frequent checks. Engineers must balance the functional needs of the part with the cost of making it.
Operational Influence
Machinists adjust their equipment to keep the output as close to the target dimension as possible. If the parts exceed the specified manufacturing tolerance, they are rejected and cannot be used in the final assembly. Regular tool maintenance prevents the drift that causes these dimensional failures, which protects the factory from unscheduled downtime.
Commercial Clause
Supply contracts specify the allowed deviations to avoid disputes over the quality of delivered components. When a supplier delivers parts that are outside the manufacturing tolerance, they are liable for the cost of replacements. The buyer has the right to reject any shipment that does not meet these technical standards.