Quality computation model of complex assembling process using multivariate process capability index

Assembling is the last phase of producing, which is influential to product quality directly, and estimating the quality of total assembling process is the prerequisite to identify the latent problems and implement quality improvement. In this paper, a quality assurance model of assembling is put forward firstly, then based on the relationship of machining and assembling, the multivariate process capability index mainly used in machining process is applied to measure the quality of assembling process. Furthermore, a method of assembling quality computation for complex products based on process capability index is proposed. Finally, an application example of a mechanical product is provided to show the correctness and validity of the method.