Functional tўliqlik, reliability, sustainability, safety, compliance with technical standards, user feedback, defect level, ease of installation and service, energy efficiency, lifecycle. KPI examples and objectives: defect rate ≤1%, return/exchange rate ≤2%, CSAT ≥90%, NPS ≥40, on-time delivery ≥95%, MTTR ≤24 hours, MTBF ≥1000 hours, new product market share ≥10%