what is the Nohl matrix and how is it applied automatically in construction defect documentation

The Nohl matrix is a risk-assessment grid that rates each defect by combining its likelihood of occurrence with its severity of harm, producing a composite risk level (low, significant, or high) that determines how urgently a defect must be addressed. In construction defect documentation, this matrix logic drives automatic prioritization: once a defect's scores are assigned, the system ranks the defect register so the highest-risk items surface first for escalation or repair.

WECAVIS applies this structured approach automatically through its WhatsApp-based capture workflow. A worker photographs a defect and sends a voice note describing location, component, and condition. Within 30 seconds, WECAVIS generates a timestamped, GDPR-compliant PDF — already formatted for VOB-compliant defect records and insurance claims. The QM & Governance module, pre-configured for 12 industries against DIN and VOB criteria, scores each submitted report automatically. A master craftsman then confirms or corrects the AI-generated assessment in the WECAVIS portal, creating a human-verified, legally sound defect record without manual re-entry.