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Cost-benefit analysis (CBA) is a method of comparing the costs and benefits of different alternatives for achieving a desired outcome. CBA can help information security managers to choose the best controls to mitigate risk to acceptable levels by providing a rational and objective basis for decision making. CBA can also help information security managers to justify their choices to senior management, stakeholders, and auditors by demonstrating the value and return on investment of the selected controls. CBA can also help information security managers to prioritize and allocate resources for implementing and maintaining the controls12.

CBA involves the following steps12:

Identify the objectives and scope of the analysis

Identify the alternatives and options for achieving the objectives

Identify and quantify the costs and benefits of each alternative

Compare the costs and benefits of each alternative using a common metric or criteria

Select the alternative that maximizes the net benefit or minimizes the net cost

Perform a sensitivity analysis to test the robustness and validity of the results

Document and communicate the results and recommendations

CBA is mainly driven by the information security manager’s decision, but it can also take into account other factors such as best practices, control frameworks, and regulatory requirements. However, these factors are not the primary drivers of CBA, as they may not always reflect the specific needs and context of the organization. Best practices are general guidelines or recommendations that may not suit every situation or environment. Control frameworks are standardized models or methodologies that may not cover all aspects or dimensions of information security. Regulatory requirements are mandatory rules or obligations that may not address all risks or threats faced by the organization. Therefore, CBA is the best method to choose the most appropriate and effective controls to mitigate risk to acceptable levels, as it considers the costs and benefits of each control in relation to the organization’s objectives, resources, and environment12. References = CISM Domain 2: Information Risk Management (IRM) [2022 update], Five Key Considerations When Developing Information Security Risk Treatment Plans

= Requiring steering committee approval of risk treatment plans is the best way to help ensure an organization’s risk appetite will be considered as part of the risk treatment process because the steering committee is composed of senior management and key stakeholders who are responsible for defining and communicating the risk appetite and ensuring that it is aligned with the business objectives and strategy. The steering committee can review and approve the risk treatment plans proposed by the information security manager and ensure that they are consistent with the risk appetite and the risk tolerance levels. The steering committee can also monitor and evaluate the effectiveness of the risk treatment plans and provide feedback and guidance to the information security manager. Establishing key risk indicators (KRIs), using quantitative risk assessment methods, and providing regular reporting on risk treatment to senior management are not the best ways to help ensure an organization’s risk appetite will be considered as part of the risk treatment process, although they may be useful tools and techniques to support the risk management process. KRIs are metrics that measure the level of risk exposure and the performance of risk controls. Quantitative risk assessment methods are techniques that use numerical values and probabilities to estimate the likelihood and impact of risk events. Regular reporting on risk treatment to senior management is a way to communicate the status and results of the risk treatment process and to obtain feedback and support from senior management. However, none of these methods can ensure that the risk treatment plans are approved and aligned with the risk appetite, which is the role of the steering committee. References = CISM Review Manual 2023, Chapter 2, Section 2.4.3, page 76; CISM Review Questions, Answers & Explanations Database - 12 Month Subscription, Question ID: 121.

 A controls audit is the best indicator of an organization’s information security status, as it provides an independent and objective assessment of the design, implementation, and effectiveness of the information security controls. A controls audit can also identify the strengths and weaknesses of the information security program, as well as the compliance with the policies, standards, and regulations. A controls audit can cover various aspects of information security, such as governance, risk management, incident management, business continuity, and technical security. A controls audit can be conducted by internal or external auditors, depending on the scope, purpose, and frequency of the audit.

The other options are not as good as a controls audit, as they do not provide a comprehensive and holistic view of the information security status. Intrusion detection log analysis is a technique to monitor and analyze the network or system activities for signs of unauthorized or malicious access or attacks. It can help to detect and respond to security incidents, but it does not measure the overall performance or maturity of the information security program. Threat analysis is a process to identify and evaluate the potential sources, methods, and impacts of threats to the information assets. It can help to prioritize and mitigate the risks, but it does not verify the adequacy or functionality of the information security controls. Penetration test is a simulated attack on the network or system to evaluate the vulnerability and exploitability of the information security defenses. It can help to validate and improve the technical security, but it does not assess the non-technical aspects of information security, such as governance, policies, or awareness. References =

CISM Review Manual, 16th Edition, ISACA, 2022, pp. 211-212, 215-216, 233-234, 237-238.

CISM Questions, Answers & Explanations Database, ISACA, 2022, QID 1012.

 The message that security supports and protects the business is the most effective in obtaining senior management’s commitment to information security management. This message emphasizes the value and benefits of security for the organization’s strategic goals, mission, and vision. It also aligns security with the business needs and expectations, and demonstrates how security can enable and facilitate the business processes and functions. The other messages are not as effective because they either overstate the role of security (A), focus on technical aspects rather than business outcomes (B), or confuse the nature and purpose of security ©. References = CISM Review Manual 2022, page 23; CISM Item Development Guide 2022, page 9; CISM Information Security Governance Certified Practice Exam - CherCherTech