Description:This four-part report presents a business-centric and cost-effective approach to internal control and risk management using systems thinking and systems. This approach provides business benefits and helps enable compliance with the Sarbanes-Oxley Act of 2002, and other laws and regulations. This document is the fourth of the series, and it explores the use of monitoring to test the performance of controls. This FERF research series is being sponsored by BWise B.V.