Aspect Enhancement 🚀 (Safe) Modification ⚠️ (Risky) Definition Extend standard SAP without changing its code Change SAP standard code directly Upgrade Impact Upgrade-safe ✅ Upgrade issues ❌ (need rework) Where Used User Exits, BAdIs, Enhancements Direct changes in SAP standard objects Maintainability Easy to maintain Hard to maintain Example Add custom field validation Change standard pricing logic ...