Manufacturing process study and certification

This work presents our approach in the area of manufacturing process study and certification program aimed to assure that the manufacturing process consistently/repeatedly produces products that meet required quality and reliability goals. This paper presents principles, plans, processes, structure, guideline, performance measurements and criteria necessary to achieve and ma.intain manufacturing process requirements and certification. Utilization of FMEA (and RPN), Process Audit, Process Perfomance / Capability Study (Cpk, PPM - defect rate, DPMO), Statistical Process Control (SPC, control charts) are discussed. The key to an effective manufacturing process is to have measurements of process perfomance/ capability that reflect customer expectations, and quantify the results of work performed by the process. Such aspects as the differences between process performance and process capability, different conventional statistical theory tools to define acceptance tests approaches and sample sizes are discussed in the paper.