SPC (Statistical Process Control) checklist

An effective SPC checklist includes sections for process parameter selection, measurement system analysis, data collection procedures, control chart selection, control limit calculations, sampling methods, response protocols for out-of-control conditions, and documentation requirements. The most critical component is defining clear action steps when processes exceed control limits.

Update your SPC checklist whenever you make significant process changes, introduce new equipment, or identify new critical quality characteristics. At minimum, conduct a quarterly review to ensure sampling frequencies and control limits remain appropriate. Regular updates ensure your statistical controls evolve with your manufacturing processes.

When your process exceeds control limits, first verify the data accuracy, then temporarily halt production if quality is at risk. Investigate using the checklist’s troubleshooting guide to identify special cause variation. Document findings, implement corrective actions, and verify their effectiveness before resuming normal production.