A lot of businesses bring process capability index into be measurement quality tool.Process capability index C_(pm) is now in widespread uses in industries because of process capability index C_(pm) amply react to loss of the process and yield of the process. In general, manufactures select suppliers just only use the index C_(pm) to evaluate the suppliers' process capability. However, coming the supply chain competitive times, manufacturers have to realize how to select suppliers and subcontractors to be key point work of the supply management. Therefore, for original suppliers, we matched up the process capability index C_(pm) and process improvement capability index C_(PIM) to evaluated, measured the suppliers' process capability and reduced manufactures' improvement cost. When suppliers' process capability not enough, we can further make use of process improvement capability index C_(PIM) to measure suppliers' process improvement capability, decrease internal company's process of improvement cost effectively, and improve product's quality and production to get up to the goal of business operation forever.
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