Admin Actions Reasons Report in Performance Management

Summary: Admin Actions Reasons Report in Performance Management

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In performance management admin can perform certain action like deleting /creating/moving Performance document forward or backward and while doing that he/she has to give a reason for same. We want to develop a report on it to keep track of such admin actions explicitly. Does anyone know if this is possible? As we could not find tables for such details. If anyone know the table names or query ,please share.