Control Charts

ISO 17025 Validity of Results

Design and validate a quality assurance program per ISO/IEC 17025:2017 Clause 7.7. Covers internal QC techniques (CRMs, replicates, spikes, blanks), proficiency testing and inter-laboratory comparisons, control chart monitoring (Shewhart, CUSUM), out-of-control response procedures, and performance evaluation using z-scores and En numbers. Validates QC program completeness and PT/ILC coverage for all accredited methods.