If your customers require automotive special-process evidence, pair SPC controls with this CQI-15 Welding System Assessment digital playbook.
Choosing characteristics that matter
Focus on features that move rejects and rework: bead width, penetration proxies, toe cooldown slope (t8/5), and travel speed. the HeatCore QMS workflow reads these from inline sensors and updates charts automatically.
Reading X‑bar/R for weld stability
Operators need fast signals. The chart below shows subgroup means and ranges across time with centerlines and control limits.
Capability made simple
Compute Cp/Cpk on the same stream. Use rolling windows so the values reflect current reality, not last quarter’s data.
Alerts and actions
When limits break, the system alerts operators and opens a nonconformity. With the HeatCore QMS workflow, CAPA is ready with evidence attached.
For BIW teams running resistance spot welding, pair these SPC limits with a station-level framework for resistance spot welding monitoring in automotive BIW.
Last updated: 2025-11-12
Related reading: Pair SPC signals with structured corrective action in Welding NCR Management Software: ISO 3834 Workflow for Faster Root Cause and CAPA.
