Key skills: KPI analysis, SON, MIMO tuning, load balancing

KPI Analysis and Root Cause Methodology

Optimization engineers must master KPI decomposition — breaking high-level metrics like throughput into contributing factors: RSRP (coverage), SINR (interference), CQI (modulation efficiency), PRB utilization (load), BLER (retransmissions), and scheduling efficiency. Root cause analysis follows a structured flow: identify degraded KPI, correlate with other counters, check recent changes (new sites, parameter changes, alarms), investigate external factors (construction, seasonal traffic), and isolate the root cause. Statistical analysis skills including trending, percentile analysis, and…