Concurrent tolerancing based on process factors and signal-noise ratio quality loss

Modern manufacturing industries require balancing products´ tolerances and manufacturing cost. In terms of different given process planning, there are always exist different process factors which correspond to different manufacturing cost. A number of papers have been published in the general area of tolerance models, but little work has been carried out for the research of process factors in tolerance allocation. In this paper, the relationships between process factors and manufacturing cost are investigated. In addition, signal-noise ratio (SNR) is employed to scale the quality loss of each machining process. Concurrent tolerancing optimization model based on process factors and SNR quality loss is then proposed. A practical example is also introduced to validate the presented method