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发表于 2016-10-5 22:31:15
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The approach to PPQ should be based on sound science and the manufacturer’s overall level ofproduct and process understanding and demonstrable control. The cumulative data from allrelevant studies (e.g., designed experiments; laboratory, pilot, and commercial batches) shouldbe used to establish the manufacturing conditions in the PPQ. To understand the commercialprocess sufficiently, the manufacturer will need to consider the effects of scale. However, it isnot typically necessary to explore the entire operating range at commercial scale if assurance canbe provided by process design data. Previous credible experience with sufficiently similarproducts and processes can also be helpful. In addition, we strongly recommend firms employ objective measures (e.g., statistical metrics) wherever feasible and meaningful to achieveadequate assurance.
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