New criterion for evaluating the aptitude of measurement systems in process capability determination

作者：Villeta Maria^*; Maria Rubio Eva; Angel Sebastian Miguel; Sanz Alfredo

来源：International Journal of Advanced Manufacturing Technology, 2010, 50(5-8): 689-697.

DOI：10.1007/s00170-010-2545-2

• Measurement uncertainty
• Statistical process control
• Process capability
• Tolerancing
• Geometrical product specifications
• Metrological confirmation

In practice, carrying out statistical process control of manufacturing processes requires the use of measurement systems. These systems are not totally reliable because they are subject to inherent variability. This paper investigates the influence of measurement uncertainty on the analysis of manufacturing process capability. A new methodology is described that helps overcome the effect of measurement uncertainty in order to obtain a more accurate assessment of the capability of the production processes. This methodology presents a solution that ensures the metrological confirmation of the measurement processes, and it was developed for manufacturing processes centred at a nominal value and for off-centred processes. Moreover, an improved capability index integrated into the statistical process control is proposed for evaluating measurement systems. The index helps identify manufacturing process quality risks associated with uncertainty in measurement systems.

• 出版日期2010-9