38. Define the terms key performance indicators (KPIs), lift, model fitting, robustness, and DOE.
KPI stands for Key Performance Indicator, which is a metric that measures how successfully a company meets its goals. Lift is a measure of the target model's performance when compared to a random choice model. The lift represents how well the model predicts compared to if there was no model. Model fitting is a measure of how well the model under consideration fits the data.
