QEHSMetrics
Total Recordable Incident RateTRIR
Recordable injuries per 100 full-time workers per year.
TRIR = (recordable cases × 200,000) / hours worked. OSHA uses 200,000 as the normalising constant (100 FTE × 2,000 hrs). It is the single most-cited safety metric, but it is a lagging indicator — it measures what already happened.