Abstract: Based on the definition of concurrent tolerance design, the optimum mathematical model which is composed of sum machine cost minimum as objective function and assembly functional requirement, machine methods, stock removal tolerance, economically attainable accuracy as constraint condition is first put forward, The model can access partly quantitatively the technology economy of process route, It is proven that the model is non-convex program Finally, one simulation of concurrent tolerance design is given.

Key words: Concurrent tolerance design, Economically stainable accuracy, Process route, Stock removal