Inertial tolerancing in the case of assembled products

In the case of assembled products, tolerancing is a key factor for quality and reliability. Traditionally, tolerances are defined by an interval [LSL; USL]. Several approaches have been proposed to determine this tolerance, the main results of which be referred. Inertial Tolerancing consists in tolerancing the mean square deviation from the target rather than the distance. This alternative has numerous advantages over the traditional approach, particularly in the case of product assembly, mixed batches and conformity analysis. In this paper, we will detail “inertial tolerancing” and compare both approaches: traditional and inertial tolerancing.