Adapting the Architecture Development Method (ADM), The Open Group Architecture Framework (TOGAF), Department of Defense Architecture Framework (DoDAF), Technical Architecture Framework for Information Management (TAFIM), Federal Enterprise Architecture Framework (FEA), https://cio-wiki.org/wiki/index.php?title=Architecture_Development_Method_(ADM)&oldid=6018, The breadth of coverage of the enterprise to be defined, The extent of the time horizon aimed at, including the number and extent of any intermediate time horizons. standards for the interchange of architectural descriptions. approved as a major project independently of the others, possibly by different personnel. previously within the enterprise. used to identify the necessary definitions and selections in the Foundation Architecture. These assets may include architecture descriptions, models, and patterns taken from a variety of sources, as ITIL), Key decisions and responsible personnel for any architecture project that has been sanctioned by the governance process, A reference for future architectural and supporting process developments, guidance, and precedence. enterprises in their own right. The FEAF allows critical parts of the overall federal enterprise, called "architectural segments", to be developed The ADM is targeted primarily at architects in IT user enterprises, but a vendor organization whose products are IT-based might well wish to adapt it as a generic method for a Product Line Architecture development. The enterprise is a small-to-medium enterprise, and wishes to use a "cut-down" method more attuned to the reduced level of Very few enterprise architecture developments today actually undertake such an effort in a single development As organizations address common themes (such as service-oriented architecture, and integrated information infrastructure), and integration. The objectives of Phase B are: 1. It provides a tested and repeatable process for developing architectures. The Architecture Development Method (ADM) is applied to develop an enterprise architecture which will meet the business and information technology needs of an organization. The TOGAF ADM is a generic method, intended to be used by a wide variety of different enterprises, and in conjunction with awide variety of other architecture frameworks, if required. Governance process management includes repository management, access, communication, training, and accreditation. (typically less than two years). from scratch. resources available, and/or the resultant architecture may be confusing or cluttered. One of the risks is system engineering, system development)? systems are not special. particular capability, and the fundamental business processes are not open to modification, then a full Business Architecture may To develop a Target Business Architecture, describing the product and/or service strategy, and the organizational, functional,process, information, and geographic aspects of the business environment, based on the business principles, business goals, andstrategic drivers 3. Phases within the ADM are as follows: that can realistically be expected to accrue to the enterprise from the chosen scope of the architecture work. and the questions it is expected to help answer, is an important part of the initial phase of the ADM. For example, if the purpose of a particular architecture effort is to define and examine technology options for achieving a The Open Group Architecture Framework (TOGAF) TOGAF®âThe Open Group Architectural Frameworkâhas been used by enterprise architects (EAs) as a common language to plot IT development strategies for more than 25 years. The enterprise is very large and complex, comprising many separate but interlinked "enterprises" within an overall relatively few. Preliminary Phase The World's most comprehensive professionally edited abbreviations and acronyms database All trademarks/service marks referenced on this site are properties of their respective owners. The level of detail â¦ It is important to recognize that existing models from these various sources may not necessarily be integratable into a coherent Much of the TOGAF documentation covers the ADM, and everything else in TOGAF can be mapped back to the ADM. Key Points About the Architecture Development Method (ADM) iteration. return to top of page. The versioning of output is managed through version numbers. own set of Target Architecture descriptions. Integration either needs to come later - with its own costs and risks - or List for that Part of the TOGAF document into the Secondary Index frame in the left margin. budgeting, development planning, systems development, and procurement. The ADM is a method for developing and managing Enterprise Architecture projects. These decisions need to be made on the basis of a practical assessment of resource and competence availability, and the value to integrate, etc. At the low end, integratability means that different enterprise-wide architecture for every business function or purpose. The Open Group Architecture Framework (TOGAF) is a framework for enterprise architecture that provides an approach for designing, planning, implementing, and governing an enterprise information technology architecture. dangers of selecting too narrow an enterprise scope, particularly at the higher business levels: Current experience does seem to indicate that, in order to cope with the increasingly broad focus and ubiquity of architectures, effort. detailed Business Architecture often needs to come next, in order to underpin the Architecture Vision, detail the business case for principles, models, and standards) to allow interoperability, migration, and conformance between federated architectures. to load the Contents Why are information systems different? Whatever the reasons for wanting or having to limit the scope of the architecture activity, there are four dimensions in which or resources to build a top-down, all-inclusive architecture description encompassing all four architecture domains, even if the Federal Enterprise Architecture Framework (FEA). subsequent integration, but they can also be implemented in their own right, possibly with interim target environments defined, and The Architecture Requirements Specification provides a set of quantitative statements that outline what an implementation project must do in order to comply with the architecture. should be understood that such an architecture cannot, by definition, be a complete enterprise architecture. There are only three choices: all of which are risky and/or hugely expensive. Architectural Risk Such a framework specifies the principles for interoperability, migration, and target" syndrome. it may be a reference model for e-Commerce taken from the industry at large. Then develop one or more "Transitional Architecture" descriptions, as increments or plateaus, each in line with and To navigate around the document: Downloads of the TOGAF documentation, are available under license from the TOGAF information web site. However, this vision itself It is a reliable, proven method for developing an Enterprise Architecture that meets the business needs of an organisation, utilising the other elements of TOGAF, and other architectural assets available to the organisation. Key Points About the Architecture Development Method (ADM) The TOGAF document set is designed for use with frames. It describes a methodfor developing an enterprise architecture, and forms the core of TOGAF. The ADM is to be used as a method for something other than enterprise architecture; for example, as a general program Architecture-Driven Modernization This is the famous circle called the Architecture Development Methods (ADM). (For example, many US federal agencies have developed individual frameworks that define Technical Architecture Framework for Information Management (TAFIM) supportive of, other standard program management processes, such as those for authorization, risk management, business planning and Vertical scope, or level of detail: To what level of detail should the architecting effort go? The phases of the cycle are described in detail in the following subsections. scope, level of detail, time horizons, and choice of Transitional Architectures, any one of which may result in a less than Step 2. enterprise architecture. the scope may be defined and limited: These aspects are explored in detail below. project, simply because it is widely recognized to be at the limits of the state of the art, a fact that John Zachman himself Finally, a Target The modern enterprise increasingly extends beyond its traditional boundaries, to embrace a fuzzy combination of traditional The order of phases may also be defined by the [^Architectural-Principles|Architecture Principles] and business principles of an enterprise. Roadmaps are very important and referred through many of the TOGAF process called the Architecture Development Method (âADMâ), yet there is very little describing how we should build the roadmaps and standards how to strâ¦ the enterprise's own Enterprise Continuum with relevant re-usable building blocks. In executing the ADM, the architect is not only developing the end result of an organization-specific architecture, but is also Care should be taken to judge the appropriate level of detail to be captured, based on the intended use of the enterprise The Architecture Board should be satisfied that the method is being In such a case, the Business Architecture (or at Much of the TOGAF documentation covers the ADM, and everything else in TOGAF can be mapped back to the ADM.. In such a case, the Business Architecture (or at least the completion of it) may well follow completion of the Information Systems Architecture or the Technology Architecture. Conventional approach - requires a substantial initial investment in time and dollars. Subsequent executions will be easier, as more and more architecture assets become identified, are used to populate the If pertinent detail is Compliance with the ADM is fundamental to the The overall enterprise architecture is divided up "horizontally", into architectural "super-domains", in which each Phase G: Implementation Governance provides an architectural oversight of the implementation. The TOGAF ADM is the result of continuous contributions from a large number of architecture practitioners. projects. The ADMincludes establishing an architecture framework, developing architecture content, transitioning, and governing the realization ofarchitectures.All of these activities are carried out within an iterative cycle of continuous architecture definition and realization thatallows organizations to transform their enterprises in a controlled manner in responâ¦ At the high end, integratability ideally means that different descriptions should be capable of This chapter describes the Architecture Development Method (ADM) cycle, adapting the ADM, architecture scope, and architecture explained in Part III: Enterprise Continuum. brought under a governance framework. By this approach, the Target Architecture work is split into two or more discrete stages: In such an approach, the Target Architectures are evolutionary in nature, and require periodic review and update according to necessarily developed in a federated manner, there is a danger of architects optimizing within their own scope of activity, instead different vertical sectors/industry types. that as a "reference architecture" to be cloned in other enterprises. For example, an enterprise may wish to use the TOGAF framework and its generic ADM in conjunction with the Zachman Framework, or another Enterprise Architecture framework that has a defined set of deliverables specific to a particular vertical sector: Government, Defense, e-Business, Telecommunications, etc. Develop the Target Technology Architecture that enables the Architecture Vision, target business, data, and application building blocks to be delivered through technology components and technology services, in a way that addresses the Statement of Architecture Work and stakeholder concerns 2. well not be warranted. rapidly changing environment. vertical sector: Government, Defense, e-Business, Telecommunications, etc. Phase D, the creation of a Technology It is also important to predict the future uses of the architecture so that, within resource limitations, the architecture can A dispensation process that may grant dispensations from adherence to architecture standards and guidelines in specific cases integratability spectrum. example, in the development of a Technology Architecture - this may be the TOGAF Foundation Architecture (see Part III: Enterprise Continuum). The enterprise evolves by migrating to each of these Transitional Architectures in turn. achieved, as originally described. Architecture descriptions will normally be built with a specific purpose in mind - a specific set of business drivers that drive the Business Architecture still needs to be thought through and understood. In other cases - for example, in the development of a Business Architecture - The TOGAF Architecture Development Method (ADM) is the result of continuous contributions from a large number of architecture practitioners. Population of the Foundation Architecture follows similar principles as for an enterprise architecture, with the difference that Different approaches to The TOGAF ADM is the result of continuous contributions from a large number of architecture practitioners for serving the following purposes: enterprise level. They embody only the key strategic architectural decisions, which should be blessed by the stakeholders Note that output is generated throughout the process, and that the output in an early phase may be modified in a later phase. This approach would result in business rework, decreased productivity, and lost and missed Zachman Framework development, and acquisition of systems can begin. deployable artifacts and a process for assembling them swiftly. The core of TOGAF® is the Architecture Development Method (ADM), a method for creating systems or whole enterprise architectures [Kel11]. least the completion of it) may well follow completion of the Information Systems Architecture or the Technology Architecture. it is often necessary to have a number of different architectures existing across an enterprise, focused on particular timeframes, TOGAF embraces and extends this definition. decision must be taken as to: The breadth of coverage of the enterprise to be defined, The extent of the time horizon aimed at, including the number and extent of any intermediate time horizons. Segment approach - promotes the incremental development of architecture segments within a structured enterprise architecture The ADM is iterative over the whole process, between phases and within phases; for each iteration of the ADM, a fresh decision must be taken on: These decisions must be made on the basis of a practical assessment of resource and competence availability, and the value that can realistically be expected to accrue to the enterprise from the chosen scope of the architecture work. "Integratability" of architecture descriptions is considered in Architecture It was developed in 1995 to help enterprises and enterprise architects align on cross-departmental projects in a structured manner to facilitate key business objectives. The ADM is described in terms of a single cycle of Architecture Vision, and a set of Target Architectures (Business, Data, The Target Architectures remain relatively generic, and because of that are less vulnerable to obsolescence than the management of the set and their relationships. the realities of resource and time constraints often mean there is not enough time, funding, or resources to build a top-down, In addition to the method itself being iterative, there is also iteration within the ADM cycle, both among the individual phases Another reason for wanting to adapt the ADM is if TOGAF is to be integrated with another enterprise framework (as explained in iteration. and demand sides of architecture work) sign up to a mutually beneficial framework of governance that ensures that: Publish and subscribe techniques are being developed as part of general IT governance and specifically for the Defense All information regarding the state of any governance processes will be managed; examples of this include outstanding compliance universal data models and standard data structures emerge, integration toward the high end of the spectrum will be facilitated. extent dependent on the maturity of the architecture discipline within the enterprise concerned. architecture descriptions (whether prepared by one organizational unit or many) should have a "look and feel" that is Enterprise Architecture The TOGAF ADM defines a recommended sequence for the various phases and steps involved in developing an architecture, but it cannot recommend a scope - this has to be determined by the organization itself, bearing in mind that the recommended sequence of development in the ADM process is an iterative one, with the depth and breadth of scope and deliverables increasing with â¦ As a generic method, the ADM is intended to be used by enterprises in a wide variety of different geographies and applied in In such cases, the paramount need is to manage and exploit the A good starting point is to adopt a publish-and-subscribe model that allows architecture to be As each Transitional Architecture is It Cycle - Expansion, The Enterprise Continuum, described in detail in. The TOGAF ADM forms the core of TOGAF. The choice of scope is critical to the success of the architecting effort. If unnecessary detail is included, the architecture effort may exceed the time and The Architecture Roadmap lists individual increments of change and lays them out on a timeline to show progression from the Baseline Architecture to the Target Architecture. For example, the business Allow the architect to understand how components fit into the framework, Derive the architectural models that focus on enterprise-level capabilities, Define the conformance standards that enable the integration of components for maximum leverage and re-use, Trial and error ("knocking down the walls"), Reverse engineering the architecture from the existing systems. integrated within a meta-architecture framework. As a generic method, the ADM is intended to be used by enterprises in a wide range of different geographies and applied in different vertical sectors/industry types. description of the ADM itself. order to maximize re-use at the enterprise level. 3.11 Architecture Domain The TOGAF ADM is the result of continuous contributions from a large number of architecture practitioners. resources and system complexity typical of such an environment. (the "as-is", or baseline). The Preliminary Phase describes the preparation and initiation activities required to create an Architecture Capability including customization of TOGAF and definition of Architecture Principles. The aim should always be to seek the highest level of commonality and focus on scalable and re-usable modules in development of the enterprise-specific architecture, in this wider context the ADM can also be viewed as the process of populating Key factors to consider are the granularity and level of detail in each artefact, and the maturity of resolution. enterprise architecture framework (e.g., Zachman) to understand the coverage of the artefacts. business functions, or business requirements; and this phenomenon would seem to call into question the feasibility of a single Even at this stage of development, however, there will be architecture assets available from external sources such from the outset, whereas the detailed architectural decisions in the Transitional Architectures are deliberately postponed as far Zachman Framework. This allows specific business units to have architectures developed and governed as stand-alone architecture the complete overall enterprise would form one independent architecture project, and the other domains would be developed and One architecture instance will represent the current enterprise state It may be used in conjunction with the well-known Zachman Framework, which is an excellent classification scheme, but lacks an The be structured to accommodate future tailoring, extension, or re-use. Department of Defense Architecture Framework (DoDAF) complete architecture description being developed. framework" such as Zachman to position the various domains and artefacts, or it may be a meta-architecture framework (i.e., Architecture Description Language (ADL) and communicated to and understood by the enterprise management. enterprise. Tailor TOGAF to suit your needs: This is a one-time activity to be done before you start adopting TOGAF for your organisation. Iterating between the phases - TOGAF describes the concept of iterating across phases (e.g., returning to Business Architecture on completion of Technology Architecture). This will record all completed governance process actions and will be used to support: The governance artefacts and process are themselves part of the contents of the Enterprise Continuum. in terms of getting buy-in from large numbers of stakeholders. (usually with a strong business imperative). "federations" of architecture. domains (or segments), and then to integrate these into a more comprehensive, overarching enterprise architecture. In fact, the first execution of the ADM will often be the hardest, since the architecture assets available for re-use will be The TOGAF framework provides a series of actionable steps within the architectural process, known as the Architecture Development Method (ADM). purpose of this meta-architecture framework is to: As described above, a significant number of scoping decisions need to be taken, in terms of enterprise focus, architecture for doing architecture at all is not well recognized, then creating an Architecture Vision is almost always essential; and a Typically this would be based on one or more repositories supporting versioned object and process control and status.