SOD Check is typically required annually for financial audit purposes, with most companies opting to run it semi-annually. The first session is usually in April or May, aiming to identify issues. Companies use the next six months to fix priority issues. The second diagnostic in November or December verifies the resolution of high-priority concerns. For companies that have recently implemented their system, an initial SOD Check is recommended to ensure key roles are correctly established, serving as a baseline for future diagnostics.