Establishing risk metrics best enables an organization to increase information security control effectiveness because metrics provide measurable insight into whether controls are reducing risk as intended. CISM emphasizes that control effectiveness must be monitored using meaningful measurements aligned with risk appetite, business objectives, and key risk indicators. Reviewing implementation progress only confirms whether controls are being deployed; it does not prove that controls are effective. Performing periodic criticality analysis may help prioritize controls, but it does not continuously measure performance. Reassigning ownership may be appropriate when accountability problems exist, but it is reactive and limited to failing areas. Risk metrics enable management to detect control weaknesses, track trends, prioritize improvements, and make informed decisions. They also support continuous improvement by showing whether residual risk is moving toward acceptable levels. Therefore, risk metrics are the best mechanism to increase effectiveness because they connect control performance directly to risk reduction and management objectives.