Power BI consultants identify and resolve anomalies using statistical techniques like outlier detection and Z-score analysis. They visualize these anomalies through color-coded indicators or alerts on dashboards, making deviations immediately noticeable. Power BI consulting investigate root causes by applying drill-through and filter features to isolate affected data. Statistical methods, combined with domain expertise, enable them to determine whether anomalies result from data errors or significant business events. This process ensures that businesses can address issues proactively, maintaining data quality and operational reliability.