Publisher Summary This chapter gives a technical analysis of the process of performance indexing for the purpose of incident-free organization. Measurement and feedback systems for monitoring the status of critical actions and results are required to drive improvements needed to meet an organization's goals and objectives. Specific measurement systems may be implemented to monitor key indicators of the safety process such as: percentage of critical work completed on schedule, results of employee safety culture surveys, and frequency and severity of incidents. Utilization of the safety performance indexing technique can tell the managers whether or not the organization's progress is in the right direction. Safety performance indexing provides an effective method for measuring, tracking, and graphically displaying safety performance. This chapter, also discusses detailed technical steps for measuring the safety performance index, and its role in prevention of serious incidents. The chapter lists the main steps need for this index as, identifying key performance areas, identifying actions and results needed, identifying progress measures, establishing goals and reinforcement milestones, and tracking performance.