A Key Performance Indicator (KPI) is a quantified metric that tracks progress toward a critical objective. Effective manufacturing KPIs are few, balanced across safety/quality/delivery/cost/people, and visible at the point of work.
Common shop-floor KPIs include OEE, schedule adherence, first pass yield, TRIR, and cost per unit. KPIs cascade from strategy via hoshin kanri and are reviewed in tier meetings.