When evaluating a number of potential controls for treating risk, it is MOST important to consider:

Risk appetite sets the overall level of risk an organization is willing to take, but for specific control evaluation, residual risk and cost are more practical considerations than appetite. Control efficiency is important but secondary to overall effectiveness and cost.

Inherent risk is the risk before controls, which is evaluated during risk assessment, not primarily when evaluating potential controls for treatment; control effectiveness is crucial but must be balanced with cost.

When evaluating controls, the primary goal is to reduce risk to an acceptable level, meaning the residual risk (risk remaining after controls are applied) must be within the organization's tolerance. Simultaneously, the cost of implementing and maintaining the control must be justifiable against the benefit of risk reduction, ensuring a cost-effective risk treatment strategy.

Risk tolerance is the acceptable deviation from risk appetite, but focusing on residual risk is more direct. Control complexity is a factor for implementation and maintenance but less critical than cost and overall residual risk.