Deliverable: Transition Architecture

Purpose

A Transition Architecture shows the enterprise at incremental states reflecting periods of transition that sit between the Baseline and Target Architectures. Transition Architectures are used to allow for individual work packages and projects to be grouped into managed portfolios and programs, illustrating the business value at each stage.

Relationships

Tasks	Input To: Architecture Change Management Implementation Governance Migration Planning	Output From: Migration Planning Opportunities and Solutions

Main Description

Typical contents of a Transition Architecture are:

Opportunity portfolio:
- Consolidated gaps, solutions, and dependency assessment
- Opportunity description
- Benefit assessment
- Capabilities and capability increments
- Interoperability and co-existence requirements
Work package portfolio:
- Work package description (name, description, objectives, deliverables)
- Functional requirements
- Dependencies
- Relationship to opportunity
- Relationship to Architecture Definition Document and Architecture Requirements Specification
Milestone and milestone Transition Architectures:
- Definition of transition states
- Business Architecture for each transition state
- Data Architecture for each transition state
- Application Architecture for each transition state
- Technology Architecture for each transition state
Implementation Factor Deduction matrix, including:
- Risks
- Issues
- Assumptions
- Dependencies
- Actions
Consolidated Gaps, Solutions, and Dependencies matrix, including:
- Architecture domain
- Gap
- Potential solutions
- Dependencies

Deliverable Properties

Deliverable Parts	Viewpoints in the Business Architecture Phase Viewpoints in the Information Systems: Applications Phase Viewpoints in the Information Systems: Data Phase Viewpoints in the Opportunities and Solutions Phase Viewpoints in the Technology Architecture Phase

The Open Group gratefully acknowledge Capgemini for the creation of the Eclipse Process Framework Method Plugin for TOGAF9.

Downloads of the TOGAF documentation, are available under license from the TOGAF information web site. The license is free to any organization wishing to use TOGAF entirely for internal purposes (for example, to develop an information system architecture for use within that organization). A book is also available (in hardcopy and pdf) from The Open Group Bookstore as document G091.