@SureshG17387577 Pega does not provide a direct OOTB tool to list all unused rules automatically, but you can use the Rule Usage feature and reporting capabilities to identify them. One option is to enable the Rule Execution Profiler (REP) or use PAL (Performance Analyzer) to monitor which rules are being executed during testing or in production. Additionally, the pr4_rule_vw table can be queried to find rules with a "Last Updated" or "Created On" date that are old and may no longer be used. You can also compare this with data from pr_perf_stats or tracer logs to check for execution history. Another way is to run usage reports by class or rule type and filter out rules that haven't been referenced or executed recently. Finally, some teams use custom utilities or third-party tools to extract rule metadata and analyze usage patterns. Always review before deletion to avoid breaking dependencies.