This document discusses key performance indicators (KPIs) for preventive maintenance. It provides resources for developing KPIs including lists of sample KPIs, performance appraisal metrics, and steps for creating a KPI system. The document emphasizes that KPIs should be clearly linked to strategy and provide answers to important questions while empowering employees. It also outlines different types of KPIs such as process, input, output, leading, lagging, outcome, qualitative, and quantitative.