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The SISTEMA tool, developed by the Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA), is the global gold standard for calculating Performance Levels (PL) under ISO 13849-1. It is entirely free to download, widely accepted by auditors, and allows you to import component libraries directly from major manufacturers (Siemens, Rockwell, Schneider, etc.). The is a portable, streamlined software package designed