This document discusses utilizing human data validation for key performance indicator (KPI) analysis and machine learning. It describes Radius Intelligence's use of human validation of business data to establish ground truths for training machine learning models and evaluating data sources. While human validation provides benefits, it also incurs costs in money, time, and potential issues between validation teams and data science teams. The document outlines strategies for minimizing validation costs while meeting downstream needs through experimentation and multiple-consumer sampling techniques.