Methods Across the Decades
Early stages emphasized counting, grouping, and visualizing what happened. Over time, diagnostic techniques like cohort analysis, drivers analysis, and root-cause trees clarified why performance shifted. Managers learned to challenge surface-level trends by probing segments, seasonality, and confounding factors.
Methods Across the Decades
Regression, time series, and classification methods ushered in forecasting and churn prediction. As computing improved, ensembles and gradient boosting lifted accuracy. Predictive analytics moved decisions from opinion to probability, making risk visible and giving planners more confident scenarios to test.