Reliability-oriented quality risk modeling and monitoring approach in manufacturing process

As a critical stage to form the final product reliability, the manufacturing process is always a focus of quality control activities. However, the reliability oriented quality control in manufacturing stage has not obtained enough attention. In this paper, based on the risk-based thinking advocated by the ISO 9001:2015 standard, a reliability-oriented manufacturing quality risk monitoring approach is presented to promote the fitness of the process quality control. First, the formation mechanism of quality risk in manufacturing process is expounded considering the product reliability degradation. Then, the quality negative event is defined to metric the quality risk, and its risk computation model is established based on the potential quality failure cost. Further, the Poisson moving average chart is adopted to achieve workstation-level and product-level quality risk monitoring. Finally, a case study is carried out to verify the proposed method.