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SGS as a third party in the factory audit, the auditors often found that manufacturers set wrong sampling scheme. Some enterprises use proportional sampling method makes the risk of defect product goods procurement high or low uncertainly. Some enterprises adopt the international practice in sampling but do not fully understand the criteria to use; some companies even arbitrarily decided sampling method and receiving standards, these conditions are the causes of the sampling have a negative impact on the accuracy. SGS sampling method training courses is based on statistical probability theory, sampling on the determination of risk, the number of random selection, the choice to receive the level of sampling results and impact of the elements. OC curve used as an example of sampling on the details of specific operations to interpret the essence of sampling theory to international standards commonly
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