A cost-benefit analysis is the best guidance when selecting an appropriate risk treatment plan. A risk treatment plan is a document that describes the actions or measures that are taken or planned to modifythe risk, such as reducing, avoiding, transferring, or accepting the risk1. Selecting an appropriate risk treatmentplan means choosing the most suitable and effective option foraddressing the risk, based on the organization’s objectives, strategies, and risk criteria2. A cost-benefit analysis is a method of comparing the benefits and costs of different alternatives or options, and selecting the one that maximizes the net benefit or value3. A cost-benefit analysis is the best guidance when selecting an appropriate risk treatment plan, because it helps to:

Evaluate the feasibility, effectiveness, and efficiency of the risk treatment options, and compare them against the organization’s risk appetite and tolerance;

Balance the benefits and costs of the risk treatment options, and consider both the quantitative and qualitative aspects of the risk and the risk response;

Optimize the use of the organization’s resources and capabilities, and ensure that the risk treatment options are aligned and integrated with the organization’s goals and values;

Support the risk decision making and prioritization, and provide a rational and transparent basis for selecting the best risk treatment option. The other options are not the best guidance when selecting an appropriate risk treatment plan, as they are either less comprehensive or less relevant than a cost-benefit analysis. A risk mitigation budget is a document that allocates the financial resources for implementing and maintaining the risk mitigation actions or measures4. A risk mitigation budget can help to ensure the availability and adequacy of the funds for the risk treatment options, as well as to monitor and control the risk treatment expenditures. However, a risk mitigation budget is not the best guidance when selecting an appropriate risk treatment plan, as it does not address the benefits or value of the risk treatment options, or the suitability or effectiveness of the risk treatment options. A business impact analysis is a method of estimating the potential effects or consequences of a risk on the organization’s objectives, operations, or performance5. A business impact analysis can help to assess the severity and priority of the risk, as well as to identify the critical assets and resources that are involved or impacted by the risk. However, a business impact analysis is not the best guidance when selecting an appropriate risk treatment plan, as it does not address the costs or feasibility of the risk treatment options, or the alternatives or options for the risk treatment. A return on investment is a metric that measures the profitability or efficiency of an investment, project, or activity, by comparing the benefits and costs of the investment, project, or activity6. A return on investment can help to evaluate the performance and effectiveness of the risk treatment options, as well as to compare the risk treatment options with other investments, projects, or activities. However, a return on investmentis not the best guidance when selecting an appropriate risk treatment plan, as it does not address the qualitative or intangible aspects of the risk and the risk response, or the risk appetite and tolerance of the organization. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.1.8, Page 61.