Section: Volume C

Enterprise architecture (EA) is the best option to support the planning of IT investments required for the enterprise, because EA is a practice and a discipline that describes and documents the current and future state of the enterprise's business processes, applications, data, infrastructure, and security, and how they align with the enterprise's vision, mission, goals, and objectives. EA can help the enterprise to plan IT investments by providing a holistic view of the enterprise's IT architecture, identifying the gaps, needs, and opportunities for improvement, innovation, or transformation, and prioritizing and selecting the IT projects, programs, and portfolios that deliver the most value to the stakeholders and customers. According to ISACA's CGEIT Domain 2: IT Resources1, "EA is a key enabler for IT investment planning and decision making. EA helps to ensure that IT investments are aligned with business strategy and support business outcomes." Furthermore, according to ISACA's article on EA2, "EA can help to optimize IT spending by reducing complexity, duplication, and waste, and by increasing efficiency, agility, and interoperability." Therefore, EA is the best way to support the planning of IT investments required for the enterprise.

A risk register is a tool that records and tracks the risks associated with a project or an activity, such as developing consumer-based services using emerging technologies involving sensitive personal data. A risk register typically includes information such as the risk description, category, impact, probability, status, response strategy, and owner. Reviewing the risk register will enable the CIO to make the best decision for the customers, as it will help them to identify, assess, and prioritize the risks that may affect the security, privacy, and quality of the services, and to determine the appropriate actions to mitigate or avoid them. The other options are not as relevant, as they do not provide specific information about the risks involved in the project or activity. References: : CGEIT Review Manual (Digital Version), Chapter 4: Risk Optimization, Section 4.3:
IT Risk Management, Subsection 4.3.2: IT Risk Management Process, Page 156 : CGEIT Review Manual (Digital Version), Chapter 4: Risk Optimization, Section 4.3: IT Risk Management, Subsection 4.3.3: IT Risk Management Techniques and Tools, Page 158 : Capability Maturity Model and Risk Register Integration1