The Open Group Architecture Framework (TOGAF) David Selvaraj CSPP

The Open Group Architecture Framework (TOGAF) David Selvaraj CSPP 51075 June 1, 2011

What is TOGAF? TOGAF is an Architecture Framework which has been developed by the Open Group “to provide the methods and tools for assisting in the acceptance, production, use and maintenance of an Enterprise Architecture”. It is based on an iterative process model supported by best practices and a re-usable set of existing architecture assets.

Who is The Open Group? The Open Group is a vendor- and technology-neutral consortium, whose vision of Boundaryless Information Flow will enable access to integrated information within and between enterprises based on open standards and global interoperability

TOGAF EA Business architecture—Describes the processes the business uses to meet its goals Application architecture—Describes how specific applications are designed and how they interact with each other Data architecture—Describes how the enterprise datastores are organized and accessed Technical architecture—Describes the hardware and software infrastructure that supports applications and their interactions

Evolution of TOGAF TOGAF Version 1 in 1994 Based on the Technical Architecture Framework for Information Management (TAFIM), developed by the US Department of Defense (DoD). The Open Group Architecture Forum have developed successive versions of TOGAF Current Version TOGAF 9 in 2009

TOGAF Structure

Architecture Development Method (ADM) Provides a tested and repeatable process for developing architectures ADM includes Establishing an architecture framework Developing architecture content Transitioning Governing the realization of architectures Carried out within an iterative cycle Continuous architecture definition and realization that allows organizations to transform their enterprises in a controlled manner in response to business goals and opportunities.

The ADM: Phase-by-Phase

ADM Iteration

ADM Phases The Preliminary Phase describes the preparation and initiation activities required to prepare to meet the business directive for a new enterprise architecture, including the definition of an Organization-Specific Architecture framework and the definition of principles. Phase A: Architecture Vision describes the initial phase of an architecture development cycle. It includes information about defining the scope, identifying the stakeholders, creating the Architecture Vision, and obtaining approvals. Phase B: Business Architecture describes the development of a Business Architecture to support an agreed Architecture Vision. Phase C: Information Systems Architectures describes the development of Information Systems Architectures for an architecture project, including the development of Data and Application Architectures. Phase D: Technology Architecture describes the development of the Technology Architecture for an architecture project. Phase E: Opportunities & Solutions conducts initial implementation planning and the identification of delivery vehicles for the architecture defined in the previous phases. Phase F: Migration Planning addresses the formulation of a set of detailed sequence of transition architectures with a supporting Implementation and Migration Plan. Phase G: Implementation Governance provides an architectural oversight of the implementation. Phase H: Architecture Change Management establishes procedures for managing change to the new architecture. Requirements Management examines the process of managing architecture requirements throughout the ADM.

Phase B: Business Architecture

Data Architecture - Inputs Organizational Model for Enterprise Architecture (see Part IV, 36.2.16 Organizational Model for Enterprise Architecture), including: Scope of organizations impacted Maturity assessment, gaps, and resolution approach Roles and responsibilities for architecture team(s) Constraints on architecture work Budget requirements Governance and support strategy Tailored Architecture Framework (see Part IV, 36.2.21 Tailored Architecture Framework), including: Tailored architecture method Tailored architecture content (deliverables and artifacts) Configured and deployed tools Data principles (see Part III, 23.6.2 Data Principles), if existing Statement of Architecture Work (see Part IV, 36.2.20 Statement of Architecture Work) Architecture Vision (see Part IV, 36.2.8 Architecture Vision) Architecture Repository (see Part IV, 36.2.5 Architecture Repository), including: Re-usable building blocks (in particular, definitions of current data) Publicly available reference models Organization-specific reference models Organization standards Draft Architecture Definition Document (see Part IV, 36.2.3 Architecture Definition Document), including: Baseline Business Architecture, Version 1.0 (detailed), if appropriate Target Business Architecture, Version 1.0 (detailed) Baseline Data Architecture, Version 0.1, if available Target Data Architecture, Version 0.1, if available Baseline Application Architecture, Version 1.0 (detailed) or Version 0.1 (Vision) Target Application Architecture, Version 1.0 (detailed) or Version 0.1 (Vision) Baseline Technology Architecture, Version 0.1 (Vision) Target Technology Architecture, Version 0.1 (Vision) Draft Architecture Requirements Specification (see Part IV, 36.2.6 Architecture Requirements Specification), including: Gap analysis results (from Business Architecture) Relevant technical requirements that will apply to this phase Business Architecture components of an Architecture Roadmap (see Part IV, 36.2.7 Architecture Roadmap)

Data Architecture - Steps Select Reference Models, Viewpoints, and Tools Develop Baseline Data Architecture Description Develop Target Data Architecture Description Perform Gap Analysis Define Roadmap Components Resolve Impacts Across the Architecture Landscape Conduct Formal Stakeholder Review Finalize the Data Architecture Create Architecture Definition Document

Data Architecture - Output Refined and updated versions of the Architecture Vision phase deliverables, where applicable: Statement of Architecture Work (see Part IV, 36.2.20 Statement of Architecture Work), updated if necessary Validated data principles (see Part III, 23.6.2 Data Principles), or new data principles (if generated here) Draft Architecture Definition Document (see Part IV, 36.2.3 Architecture Definition Document), including: Baseline Data Architecture, Version 1.0, if appropriate Target Data Architecture, Version 1.0 Business data model Logical data model Data management process models Data Entity/Business Function matrix Views corresponding to the selected viewpoints addressing key stakeholder concerns Draft Architecture Requirements Specification (see Part IV, 36.2.6 Architecture Requirements Specification), including such Data Architecture requirements as: Gap analysis results Data interoperability requirements Relevant technical requirements that will apply to this evolution of the architecture development cycle Constraints on the Technology Architecture about to be designed Updated business requirements, if appropriate Updated application requirements, if appropriate Data Architecture components of an Architecture Roadmap (see Part IV, 36.2.7 Architecture Roadmap)

Building Blocks

Architecture Capability Framework

Architecture Content Framework

Enterprise Continuum TOGAF views the world of enterprise architecture as a continuum of architectures, ranging from highly generic to highly specific.

Enterprise Continuum A view of the Architecture Repository that provides methods for classifying architecture and solution artifacts as they evolve from generic Foundation Architectures to Organization-Specific Architectures Explains how generic solutions can be leveraged and specialized in order to support the requirements of an individual organization

Enterprise Continuum

Stakeholders, Views, Viewpoints Viewpoint is a perspective (where you are looking from) and generally specific to a stakeholder group view is what you see and is created to ensure that particular stakeholders can see an architecture from a point of view which matches their concerns

Views and Viewpoints

Limitations The TOGAF specification is also flexible with respect to the phases. TOGAF allows phases to be done incompletely, skipped, combined, reordered, or reshaped to fit the needs of the situation Lacks templates for some artifacts.

Framework Comparison The Zachman Framework for Enterprise Architectures—Although self-described as a framework, is actually more accurately defined as a taxonomy The Open Group Architectural Framework (TOGAF) —Although called a framework, is actually more accurately defined as a process The Federal Enterprise Architecture—Can be viewed as either an implemented enterprise architecture or a proscriptive methodology for creating an enterprise architecture - Based on Roger Sessions, ObjectWatch Inc.

Framework Comparison

References http:// pubs.opengroup.org/architecture/togaf9-doc /arch www.orbussoftware.com/enterprise./ togaf/togaf-9-in-pictures The Oracle Enterprise Architecture Framework – White paper 2009 A Comparison of the Top Four Enterprise-Architecture Methodologies http://msdn.microsoft.com/en-us/library/bb4 66232.aspx