This document discusses key performance indicator (KPI) formulas and how to create effective KPIs. It provides steps to build a KPI system, common mistakes to avoid, and how KPIs should be designed to link to strategy and empower employees. It also describes different types of KPIs, including process, input, output, leading, lagging, outcome, qualitative, and quantitative KPIs. Top materials recommended include lists of KPIs, performance appraisal forms, and performance appraisal methods.