Audit-trail review missing for spreadsheet-based release calculations.
Your batch release uses Excel for assay calculations, but no documented review of the formula audit trail.
"ICH Q7 §5.4 requires sufficient controls over computerized systems so that only authorized personnel can change records, with data input and processing output checked for accuracy — and changes to GMP-relevant data traceable."
QC-SOP-014 Rev 03 documents the dilution-and-assay calculation flow using LIMS for raw data entry. Final release calculations are performed in QC-CALC-001.xlsx (Excel) — referenced in 14 batch release records from Q1 2026. The SOP does not require a documented review of the spreadsheet's formula audit trail per FDA Data Integrity guidance §III(C)(2). Three of those 14 batch records show formula edits with no second-person review log.