When developing a Business Architecture, TOGAF provides guidance on how to leverage existing architecture descriptions to build a comprehensive and accurate Baseline Description. Here's a step-by-step explanation:

Existing Architecture Descriptions:

Existing architecture descriptions provide valuable insights into the current state of the enterprise's architecture. These descriptions can include documentation of processes, systems, technologies, and organizational structures.

Baseline Description:

The Baseline Description represents the current state of the enterprise architecture. It serves as the starting point for developing the Target Architecture and planning the transition from the current state to the future state.

Using Existing Descriptions:

Review and Analyze: Existing architecture descriptions should be reviewed and analyzed to understand the current state accurately. This involves identifying all relevant artifacts, documents, and data.

Integration into Baseline: The information from the existing descriptions should be integrated into the Baseline Description. This ensures that the Baseline accurately reflects the current state, providing a solid foundation for future planning.

Gaps and Opportunities: By using existing descriptions, architects can identify gaps in the current architecture and opportunities for improvement. This helps in formulating a more effective Target Architecture.

TOGAF ADM Reference:

Phase A: Architecture Vision: This phase involves establishing the architecture vision, which includes defining the scope and approach for the Baseline Description.

Phase B: Business Architecture: During this phase, the Baseline Business Architecture is developed using existing architecture descriptions as a key input.

In summary, using existing architecture descriptions as the basis for the Baseline Description ensures that the current state is accurately documented, providing a reliable foundation for developing the Target Architecture and planning the transition.

One of the reasons that supports the need to govern Enterprise Architecture is that best practice governance enables the organization to control value realization6.Value realization is the process of ensuring that the expected benefits from implementing an Enterprise Architecture are achieved and sustained over time6. Best practice governance provides a framework and mechanisms for monitoring and evaluating the performance and outcomes of Enterprise Architecture initiatives, as well as ensuring alignment with strategic objectives and stakeholder expectations.

https://pubs.opengroup.org/togaf-standard/adm-practitioners/adm-practitioners_15.html In short, the implementation team is directed to create changes with intentional value-based outcomes. Best practice governance enables the organization to control value realization.

The diagram provided illustrates a Capability Map. Here's why:

Focus on 'what' the organization does: The diagram depicts various functions and activities that the organization performs, such as 'Program/Human Resource Matching,' 'Employee Supply and Demand Mgmt,' 'Benefits Management,' etc. These represent the capabilities of the organization, or what it is able to do.

Hierarchical structure: The capabilities are organized hierarchically, with broader functions like 'HR Mgmt.' encompassing more specific capabilities like 'Position Advertising' and 'Skills Assessment.' This shows how different capabilities relate to each other and contribute to higher-level functions.

No specific process flow: Unlike a process map or value stream map, this diagram doesn't show a sequence of steps or flow of activities. It focuses on the capabilities themselves, not how they are executed

The need to govern Enterprise Architecture is supported by the fact that best practice governance enables the organization to control value realization. Here's a detailed explanation:

Enterprise Architecture Governance:

Definition: Governance in the context of Enterprise Architecture (EA) involves establishing processes, roles, and responsibilities to ensure that the architecture is developed and maintained in alignment with the business strategy and objectives.

Importance of Governance:

Control and Accountability: Effective governance ensures that architecture activities are controlled and aligned with business priorities. It establishes accountability for architectural decisions and outcomes.

Value Realization: Governance mechanisms ensure that the architecture delivers value to the organization by aligning with strategic goals, optimizing resource usage, and ensuring that architecture initiatives are completed successfully.

TOGAF Reference:

Architecture Governance Framework: TOGAF provides a framework for architecture governance, including guidelines for establishing governance structures, processes, and tools to manage architecture activities effectively.

ADM Phases: Governance is integrated into all phases of the ADM to ensure that architecture development is controlled and aligned with business needs. This includes monitoring progress, managing risks, and ensuring compliance with architecture principles and standards.

Best Practices:

Continuous Improvement: Best practice governance involves continuous monitoring and improvement of the architecture processes to ensure they remain effective and deliver the desired outcomes.

Stakeholder Engagement: Effective governance ensures ongoing engagement with stakeholders, ensuring their needs and concerns are addressed, and maintaining alignment with business objectives.

In summary, the need to govern Enterprise Architecture is supported by the fact that best practice governance enables the organization to control value realization, ensuring that architecture initiatives are aligned with strategic goals and deliver tangible benefits.

Heat mapping is an analysis technique used to provide a visual representation of data, often to show performance against a set of criteria. In the context of business capabilities, heat maps can be used to represent various dimensions such as maturity levels, investment priorities, risk levels, etc., on the same set of business capabilities. This allows different stakeholders to quickly grasp where attention is needed or how capabilities align with strategic priorities.