Warning Letter: Spreadsheet Calculations not Verified or Documented (ucm174100)

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Ofni Systems

Your laboratory records did not include a record of all calculations performed in connection with laboratory tests as required by 21 CFR § 211.194(a)(5). For example, laboratory notebook #7, page 49, documents the assay results, but not the calculations performed in Test number DSFS D-13 and Test number TG 521 for the analysis of [redacted], lot #HI7908. The notebook does not document reference to the spreadsheet calculation used to generate the results. In addition, the assay results generated by the spreadsheet were not verified for accuracy. Your response dated February 16, 2009, states that you have established procedures to ensure that calculations of method validation studies are recorded. The Records Management SOP, Section 5.7.4.7, states that the procedures shall define what and how data is to be recorded in respective logbooks. However, this SOP omits instructions to include in the notebook the reference to the spreadsheet calculation used to generate the results, as well as the raw data and calculations. In addition, you continued to release products based on assay results generated by the spreadsheet that have not been verified for accuracy.

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