Abstract
Design tolerance has tremendous influence on both manufacturing cost and quality of a product. The purpose of the paper is to propose a new way of the product optimal tolerance design based on service quality, which is more realistic because the service quality loss model describes the present worth model of quality loss based on the service life distribution, and expresses an actual loss that a product imparts on society after the product is put into service by considering the parts processing equipment during product manufacturing process, operating environment, and lubrication condition during product service. However, many scholars consider manufacturing cost and quality loss for the optimal tolerance design of product at present, in which uses Taguchi quality loss model or Teran quality loss model. The former reflects the forecast of a loss that a product may bring to the society on the time node before it leaves the factory. Although the latter involves the changes of the product quality characteristics after the product is put into service, but its essence is to transform the product quality loss in a certain service life into the present worth on the time node before the product is put into service, and it is still the forecast of a loss for the society, and has many shortages that it takes quality loss cost as cash flow and service life as a certain value. So the proposed way can extend the product tolerance design from the manufacturing stage to the service stage, and enriches the theory of the product optimal tolerance design.
Published Version
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