Residual risk from the findings of previous audits should be the primary basis for prioritizing follow-up audits, because it reflects the level of exposure and potential impact that remains after management has implemented corrective actions or accepted the risk. Follow-up audits should focus on verifying whether the residual risk is within acceptable levels and whether the corrective actions are effective and sustainable. Audit cycle defined in the audit plan, complexity of management's action plans, and recommendation from executive management are not valid criteria for prioritizing follow-up audits, because they do not consider the residual risk from previous audits. References: CISA Review Manual (Digital Version), Chapter 2, Section
2.4.3

The most significant impact to an organization that does not use an IT governance framework is inadequate alignment of IT plans and business objectives. IT governance is a framework for the governance and management of enterprise information and technology (I&T) that supports enterprise goal achievement1. IT governance helps to ensure that IT investments and activities are aligned with the business strategy, vision, and values of the organization. IT governance also helps to optimize the value of IT, manage IT-related risks, and measure and monitor IT performance1.
Without an IT governance framework, an organization may face challenges such as:
Lack of clarity and direction for IT decision making
Inconsistent or conflicting IT priorities and demands
Inefficient or ineffective use of IT resources and capabilities
Poor quality or delivery of IT services and products
Increased exposure to IT-related threats and vulnerabilities
Reduced customer satisfaction and trust in IT
Missed opportunities for innovation and competitive advantage
Therefore, an organization that does not use an IT governance framework may fail to achieve its business objectives and may lose its competitive edge in the market.
References:
COBIT 2019 Framework Introduction and Methodology, Section 1.1: What Is Governance of Enterprise I&T?
IT Governance: Definitions, Frameworks and Planning, Section 1: What Is IT Governance?

Fine tuning the intrusion detection system (IDS) is the best recommendation to reduce the number of false positive alerts that overwhelm the log management system, because it can help adjust the sensitivity and accuracy of the IDS rules and signatures to match the network environment and traffic patterns. Establishing criteria for reviewing alerts, recruiting more monitoring personnel, and reducing the firewall rules are not effective solutions to address the root cause of the false positive alerts, but rather ways to cope with the consequences. References: CISA Review Manual (Digital Version), Chapter 5, Section 5.4.3

EVA is a project management technique that measures the performance of a project by comparing the actual work completed, the actual costs incurred, and the planned costs for the work scheduled. EVA can help determine if the project is on track, ahead of schedule, or behind schedule, and if the project is under budget, over budget, or on budget. EVA can also help forecast the final cost and schedule of the project based on the current performance.
References
ISACA CISA Review Manual, 27th Edition, page 255
18. Project Completion - Project Management - 2nd Edition
How to Measure Project Success | Smartsheet