How to Prioritize Controls Based on Cost and Risk:

The priority of a control is based on its cost-effectiveness. Controls that protect assets with higher risk exposure relative to the cost of the control should be prioritized. The formula to calculate cost-effectiveness is: Cost-Effectiveness=Cost of ControlAsset Amount at Risk\text{Cost-Effectiveness} = \frac{\text{Cost of Control}}{\text{Asset Amount at Risk}}Cost-Effectiveness=Asset Amount at RiskCost of Control​

Lower ratios indicate more cost-effective controls.

Calculations:

Asset A:$15,000 / $150,000 = 0.10 (10%)

Asset B:$2,500 / $6,000 = 0.42 (42%)

Asset C:$50,000 / $2,000,000 = 0.025 (2.5%)

Asset D:$20,000 / $500,000 = 0.04 (4%)

Lowest Priority:

Asset Bhas the highest ratio (42%), meaning it is the least cost-effective and should be the lowest priority for controls.

References and Documents:

COSO Internal Control Framework:Discusses cost-benefit analysis for prioritizing controls.

GAO Risk Management Guide:Emphasizes evaluating control cost-effectiveness relative to asset risk.