Statistical Dynamic Specifications Method for Allocating Tolerances

The assembly of components coming from manufacturing process characterized by high dimensional variation could be difficult if their cumulative variation is in the order of magnitude of the allowed tolerance. The problem was approached by managing dynamically the specifications and the allocation of tolerances. By means of simulating the production of multi-component assemblies different scenarios were defined to demonstrate the advantages of the Statistical Dynamic Specifications Method (SDSM). Simulation results showed an average increment of 46% in the tolerance of the intervened component. With this, the corresponding potential capability index cp varied from 1.29 to 1.85. Thus, it was shown that SDSM is a useful tool to deal with the high variation problem without focusing directly on the variation sources.