TOGAF (Notes)

Enterprise refers to an organization or business entity that is created to achieve specific goals, typically involving the production of goods, delivery of services, or generation of profit.
It can range from small businesses to large corporations and includes public, private, and non-profit organizations.
Enterprises are characterized by their structure, resources, processes, and objectives.
In the context of IT and business, an enterprise often refers to a large-scale organization with complex systems and operations.

BDAT is a framework used in enterprise architecture to align business goals with IT systems and processes.
It represents the four key layers of enterprise architecture:

Business: Focuses on the organization's goals, strategies, processes, and operations.
Data: Deals with the management, storage, and utilization of data to support business decisions. - Logical and Physical
Application: Refers to the software and systems used to process data and support business functions.
Technology: Encompasses the hardware, networks, and infrastructure that enable applications and data processing.

BDAT ensures that all layers work cohesively to achieve enterprise objectives and improve efficiency.

Definition: The Architecture Development Method (ADM) is the core process in TOGAF (The Open Group Architecture Framework) used to develop and manage enterprise architecture.
Purpose: Provides a step-by-step approach to design, plan, implement, and govern enterprise architecture.
Phases of ADM:

Preliminary Phase: Establish the architecture framework, principles, and governance.
Phase A: Architecture Vision: Define the scope, stakeholders, and high-level vision of the architecture.
Phase B: Business Architecture: Develop the business architecture to support the enterprise's goals.
Phase C: Information Systems Architecture:
- Data Architecture: Define data structures and management.
- Application Architecture: Define application systems and their interactions.
Phase D: Technology Architecture: Define the technology infrastructure to support applications and data.
Phase E: Opportunities and Solutions: Identify implementation projects and prioritize them.
Phase F: Migration Planning: Create a roadmap for implementation and migration.
Phase G: Implementation Governance: Oversee the implementation to ensure alignment with the architecture.
Phase H: Architecture Change Management: Manage changes to the architecture over time.
Requirements Management: A continuous process to manage requirements throughout the ADM cycle.

Definition: Formal outputs that are contractually specified and reviewed. They are the end results of a project or phase and are typically signed off by stakeholders.
Purpose: Used to communicate architecture work to stakeholders and guide implementation.
Examples:
Architecture Vision Document
Business Architecture Report
Technology Architecture Report
Implementation and Migration Plan
Architecture Requirements Specification

Definition: Specific pieces of information that describe an aspect of the architecture. Artifacts are the building blocks of deliverables.
Purpose: Provide detailed documentation of the architecture, such as models, diagrams, and catalogs.
Types of Artifacts:

Catalogs: Lists of things (e.g., applications, data entities, business functions).
- Example: Application Portfolio Catalog, Data Entity Catalog.
Matrices: Show relationships between elements.
- Example: Application/Data Matrix, Business Interaction Matrix.
Diagrams: Visual representations of architecture.
- Example: Process Flow Diagram, Network Diagram, Use Case Diagram.

Definition: Reusable components of the architecture that can be combined to create solutions. They can be either architectural building blocks (ABBs) or solution building blocks (SBBs).
Purpose: Provide a modular approach to designing and implementing architecture.
Types:

Architectural Building Blocks (ABBs):
- High-level components that define what is required.
- Example: Business services, data models, application functions.
Solution Building Blocks (SBBs):
- Real-world implementations of ABBs.
- Example: Specific software applications, hardware platforms, or network configurations.

Artifacts are the detailed documentation (e.g., diagrams, catalogs) that describe the architecture.
Deliverables are the formal outputs that package multiple artifacts for stakeholder review.
Building Blocks are the reusable components that are described in artifacts and implemented as part of deliverables.

Definition: The Enterprise Continuum is a conceptual framework in TOGAF that provides a way to classify and organize architecture artifacts, solutions, and other building blocks. It helps organizations understand and manage the different levels of abstraction in their architectures.
Purpose:
To guide the reuse of architecture assets.
To provide a structured way to manage and evolve enterprise architecture.
To facilitate communication and collaboration between stakeholders by categorizing architecture artifacts.
Key Components:

Definition: The Architectural Repository is a central storage area in TOGAF that holds all the architectural assets, models, and documentation required to manage and govern enterprise architecture.
Purpose:
To provide a structured environment for storing and managing architecture-related information.
To support the reuse of architecture assets across the organization.
To ensure consistency and traceability in architecture development.
Key Components:

Architecture Metamodel: Defines the structure and relationships of the architecture artifacts.
Architecture Capability: Contains information about the processes, tools, and skills required for architecture governance.
Architecture Landscape: Represents the current, planned, and aspirational states of the architecture.
Standards Information Base (SIB): Stores standards and guidelines for architecture development.
Reference Library: Contains reusable reference models, patterns, and templates.
Governance Log: Tracks decisions, compliance, and changes related to architecture governance.

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