In most cases, management of the enterprise is the responsibility of the executive management team. The executive management team consists of senior managers who are accountable for implementing the strategies and policies set by the board or other governing body. They are also responsible for planning, organizing, directing, controlling, and reporting on the enterprise's operations3. The executive management team may delegate some of their management responsibilities to other managers or staff, but they remain ultimately accountable for the outcomes4. References: 3: COBIT 2019 Framework: Introduction and Methodology, page
28 4: COBIT 2019 Framework: Governance and Management Objectives, page 21

A capability maturity model is a tool that assesses how well a process is implemented and performing at a given level, ranging from 0 (non-existent) to 5 (optimized). Each level defines a set of attributes that describe the characteristics of the process at that level, such as process performance, process documentation, process control, process measurement, etc. The model is based on the COBIT 2019 Process Assessment Model4, page
11. References: 4: COBIT 2019 Process Assessment Model | Digital | English

The alignment goal titled "Knowledge, expertise and initiatives for business innovation" is aligned to the Learning and Growth dimension of the IT balanced scorecard (BSC). The IT BSC is a tool that translates the IT-related goals into a set of performance indicators that can be measured and monitored. The Learning and Growth dimension focuses on the capabilities and skills of the IT staff, as well as the culture and climate that foster innovation and learning. The alignment goal is based on the COBIT 2019 Framework5, page 38.
References: 5: COBIT 2019 Framework | Digital | English

According to the COBIT 2019 Implementation Guide, the best way for senior leadership to communicate its expectations for IT governance prior to commencing a governance implementation plan is to include a scope statement in the business case. The scope statement defines the boundaries and objectives of the IT governance system, as well as the roles and responsibilities of the stakeholders involved. The scope statement also provides clarity and alignment on what is expected from IT governance and how it will support the enterprise strategy.2, p. 25-26 References: 2: COBIT 2019 Implementation Guide: Implementing an Information and Technology Governance Solution

The primary objective of reviewing the effectiveness of a new IT governance system that has been operational for 6 months is to identify further governance requirements. An IT governance system is a set of components that provide direction, oversight, evaluation, monitoring, assurance, etc., for an enterprise's information and technology. The effectiveness of an IT governance system can be reviewed using different methods or tools, such as audits, assessments, surveys, feedbacks, etc. The primary objective of reviewing the effectiveness of a new IT governance system that has been operational for 6 months is to identify further governance requirements that may arise from changes in the internal or external environment, stakeholder needs, business objectives, etc.12 References: COBIT 2019 Framework: Introduction and Methodology, COBIT 2019 Implementation Guide: Implementing an Information and Technology Governance Solution