Chapter 10: Step 2 — Nonconformance Classification and Prioritization

You now have a quarantined batch and a containment record. Before you launch a full root cause investigation, you need to ask: Is this worth a major investigation, or can we handle it quickly? This is where risk-based triage saves you from drowning in low-value CARs.

The Risk-Based Triage Matrix: Severity × Recurrence × Detection

Assign a priority level (Critical, Major, Minor) using three dimensions:

1. Severity: What would happen if this reached a customer?

• Safety risk, regulatory violation, line shutdown → Critical
• Performance impact, aesthetic flaw, functional degradation → Major
• Cosmetic, documentation error, no functional impact → Minor

2. Recurrence: How often has this happened in the past?

• First occurrence, new process → Lower risk
• Recurring issue, has failed twice in past 12 months → Higher risk
• Chronic problem, happens regularly → Critical consideration

3. Detection: How likely would the customer have caught this themselves?

• We found it with 100% inspection → Lower risk
• We found it with sampling inspection → Medium risk
• Customer would likely find it → Critical

Create a simple matrix:

Response Timelines

Assign timelines to each priority:

• Critical: Root cause analysis complete within 3 days; corrective action approved within 5 days; effectiveness verified within 14 days.
• Major: Root cause analysis within 7 days; corrective action approval within 10 days; verification within 30 days.
• Minor: Root cause analysis within 14 days; corrective action within 30 days; closure within 60 days.

These are internal targets, not promises to customers. But they keep your team accountable and prevent CAR files from aging indefinitely.

The Most Common Mistake: CAR Inflation

Here's what kills a corrective action system in Canadian manufacturers: opening one CAR for every minor hiccup. You end up with 200 active CARs, each needing attention, and none of them getting solved.

Set a threshold: documentation errors, one-off typos in work instructions, and isolated operator mistakes *do not require a full CAR*. They require a correction. Use a simpler form—a "Corrective Maintenance Log" or "Process Adjustment Record"—for these quick fixes. Save full CARs for systematic issues, repeating problems, and anything a customer could detect.

Pro Tip: If the same "minor" issue pops up a second time within six months, convert it to a formal CAR and investigate why your quick fix didn't stick. This signals that your process needs permanent improvement, not just a patch.