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GMP Compliance Adviser
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Question of the Week

Why should rounded values not be used for further calculations?

Because it is not clear whether the reported results will be used for further calculations, only those results that are not rounded may be reported. This applies, in particular, to the representation of results in reports and documents where additional calculations of a statistical nature such as trend analyses are essential, i.e. in stability reports, as part of ongoing verification during manufacture and in the Product Quality Review (PQR).

[GMP Compliance Adviser, Chapter 14.N.3]

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