This document discusses key performance indicator (KPI) metrics for call centers. It provides resources for call center KPIs, including lists of KPIs, performance appraisal metrics, job skills, and key result areas. It recommends visiting a website for additional free ebooks and materials on KPIs, including lists of KPIs, performance appraisal forms, and performance appraisal methods. The document also discusses how to create KPIs for specific job roles or positions by defining objectives and key result areas, identifying tasks, determining work procedures, and creating metrics to measure results.