Comprehensive Guide to Phase B: Business Architecture in TOGAF ADM

Introduction

Phase B of the TOGAF Architecture Development Method (ADM) focuses on developing the Business Architecture to support the agreed Architecture Vision. This phase involves creating a detailed description of how the enterprise needs to operate to achieve its business goals and respond to strategic drivers. The following guide outlines the objectives, steps, inputs, and outputs for Phase B, ensuring a structured approach to developing the Business Architecture.

Objectives and Steps

1. Develop the Target Business Architecture

Objective: Describe how the enterprise needs to operate to achieve business goals and respond to strategic drivers, addressing the Statement of Architecture Work and stakeholder concerns.

Steps:

Select Reference Models, Viewpoints, and Tools: Choose appropriate reference models, viewpoints, and tools that will be used to develop the Business Architecture.
Develop the Baseline Business Architecture Description: Create a detailed description of the current Business Architecture.
Develop the Target Business Architecture Description: Define how the enterprise should operate to meet the business goals and strategic drivers.
Perform a Gap Analysis: Identify the gaps between the Baseline and Target Business Architectures.
Define Candidate Roadmap Components: Based on the gap analysis, identify components that will be included in the Architecture Roadmap.
Resolve Impacts Across the Architecture Landscape: Address any impacts that the new Business Architecture may have on other architectural domains.
Conduct a Formal Stakeholder Review: Present the Business Architecture to stakeholders for review and feedback.
Finalize the Business Architecture: Incorporate stakeholder feedback and finalize the Business Architecture.
Create/Update Architecture Definition Document: Document the Business Architecture in the Architecture Definition Document.

Inputs and Outputs

Inputs

Architecture Reference Materials:
- Use architecture reference materials to guide the development of the Business Architecture.
Request for Architecture Work:
- The initial request that triggers the architecture development process.
Business Principles, Business Goals, and Business Drivers:
- Key business information that guides the architecture development.
Capability Assessment:
- An evaluation of the organization’s current capabilities.
Communications Plan:
- A plan for communicating the architecture vision and progress to stakeholders.
Organizational Model for Enterprise Architecture:
- The organizational structure and roles involved in the Enterprise Architecture.
Tailored Architecture Framework:
- The customized architecture framework used for the project.
Approved Statement of Architecture Work:
- The approved document that outlines the scope, objectives, and deliverables of the architecture project.
Architecture Principles:
- The guiding principles for the architecture development, including business principles.
Enterprise Continuum:
- A view of the Architecture Repository that shows the evolution of the enterprise’s architectures.
Architecture Repository:
- Existing architecture documentation, including framework descriptions, architecture descriptions, and baseline descriptions.
Architecture Vision:
- The comprehensive vision for the future state of the enterprise architecture, including refined key high-level stakeholder requirements.
Draft Architecture Definition Document:
- A preliminary document that may include baseline and/or target architectures of any architectural domain.

Outputs

Refined and Updated Versions of the Architecture Vision Phase Deliverables:
- Updated deliverables from the Architecture Vision phase, including the Statement of Architecture Work, validated business principles, business goals, and business drivers, and Architecture Principles.
Draft Architecture Definition Document Containing Content Updates:
- An updated Architecture Definition Document that includes:
  - Baseline Business Architecture (approved, if appropriate)
  - Target Business Architecture (approved with business capabilities, business data model, business processes, etc.)
  - Views corresponding to selected viewpoints addressing key stakeholder concerns
Draft Architecture Requirements Specification Including Content Updates:
- An updated Architecture Requirements Specification that includes:
  - Gap analysis results
  - Technical requirements
  - Updated business requirements
Business Architecture Components of an Architecture Roadmap:
- Components of the Architecture Roadmap that outline the steps to transition from the Baseline to the Target Business Architecture.

Key Concepts

Business Architecture: A detailed description of how the enterprise needs to operate to achieve its business goals and respond to strategic drivers.
Baseline Business Architecture: The current state of the Business Architecture.
Target Business Architecture: The desired future state of the Business Architecture.
Gap Analysis: The process of identifying the differences between the Baseline and Target Business Architectures.
Architecture Roadmap: A plan that outlines the steps to transition from the Baseline to the Target Business Architecture.
Stakeholder Review: The process of presenting the Business Architecture to stakeholders for feedback and approval.

Conclusion

Phase B of the TOGAF ADM is crucial for developing a comprehensive Business Architecture that supports the agreed Architecture Vision. By following the outlined steps and utilizing the necessary inputs, organizations can create a detailed Business Architecture that addresses business goals, strategic drivers, and stakeholder concerns. The outputs of this phase provide a clear roadmap for transitioning from the current state to the desired future state, ensuring alignment with business objectives and strategic initiatives.