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There has been no technique for evaluating or measuring the fit of components until today. Parts have not been developed to fit their intended mating surfaces and no defined method exists for assuring that these fits remain consistent. Design verification and production validation could not be confirmed until the beginning of production while coordinating fits between components was normally ignored. As a result interface contact performance minimums within joints could not be assured so failures from internal stresses or insufficient contact (bond) would result. The following surface match technique provides joint design and development control capabilities necessary for removing the unknowns from joint design and manufacturing. The technique provides insights and controls necessary to achieve reliable joint performance with control starting at the design prototype development phase and continuing through to ongoing quality control.