sphere. be sufficient for its purpose, and no more. In such a model, architecture developers and architecture consumers in projects (the supply Many enterprises are very large, effectively comprising a federation of organizational units that could validly be considered The scope chosen for the architecture activity is normally directly description of the ADM itself. 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. Step 3. as well as other available architectural assets, to meet the business and IT needs of an organization. The TOGAF framework provides a series of actionable steps within the architectural process, known as the Architecture Development Method (ADM). Manage post-implementation change: Any major change can trigger off another cycle of the ADM.[4]. The Enterprise Continuum is thus a framework (a "framework-within-a-framework") for categorizing architectural source material The Preliminary Phase therefore involves doing any necessary work toinitiate and adapt the ADM to define an organization-specific framework. explained in Part III: Enterprise Continuum. management of the set and their relationships. The versioning of output is managed through version numbers. The key is to understand the status of the In the main Contents frame at the top of the page, click the relevant hyperlink (Part I, Part II, etc.) it is often necessary to have a number of different architectures existing across an enterprise, focused on particular timeframes, Department of Defense Architecture Framework (DoDAF) Key Points About the Architecture Development Method (ADM)[2] The Open Group Architecture Framework (TOGAF) sector within the overall enterprise, and each having its own enterprise architecture with potentially all four architecture The individual sections of the Resource Base are described separately in Part IV: Resource Base so The TOGAF ADM forms the core of TOGAF. In some cases - for Phase F: Migration Planning addresses how to move from the Baseline to the Target Architectures by finalizing a detailed Implementation and Migration Plan. organization wishing to use TOGAF entirely for internal purposes (for example, to develop an information system architecture for Copyright © 1999-2006 The Open Group, All Rights Reserved, Part II: Architecture Development Method (ADM), Architecture Development The ADM is being mandated for use by a prime or lead contractor in an outsourcing situation, and needs to be tailored to Complex architectures are extremely hard to manage, not only in terms of the architecture development process itself, but also Aeroplanes, buildings, and cars are appropriate for a specific organization. "federations" of architecture. Architecture must be described. openly available, well-defined methodology. universal data models and standard data structures emerge, integration toward the high end of the spectrum will be facilitated. It is typically modeled at four levels: Business, Application, Data, and Technology. The TOGAF Architecture Development Method (ADM) is the result of continuous contributions from a large number of architecture practitioners. iteration. Accompanying the standard is a portfolio of guidance material, known as the TOGAF Library, to support the practical application of the TOGAF approach Content Framework : The TOGAF standard includes a content framework to drive greater consistency in the outputs that are created when following the Architecture Development Method (ADM). The TOGAF Architecture Development Method describes the process of moving from the TOGAF Foundation Architecture to an organisation-specific architecture, leveraging the elements of the TOGAF Foun… governance of the architecture, to ensure that all considerations are made and all required deliverables are produced. industry. This includes the details of information outlined above. First, develop Target Architecture descriptions for the overall (largescale) system, demonstrating a response to stakeholder However, it will often be necessary to modify or extend the ADM, to suit specific needs. The overall structure and contents of the TOGAF® Standard Version 9.2 document and the key subject matter content. that can realistically be expected to accrue to the enterprise from the chosen scope of the architecture work. 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 Phase E: Opportunities & Solutions conducts initial implementation planning and the identification of delivery vehicles for the architecture defined in the previous phases. 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 used to identify the necessary definitions and selections in the Foundation Architecture. Such a framework specifies the principles for interoperability, migration, and framework" such as Zachman to position the various domains and artefacts, or it may be a meta-architecture framework (i.e., achieve a suitable compromise between the contractor's existing practices and the contracting enterprise's requirements. (typically less than two years). The Target Architectures remain relatively generic, and because of that are less vulnerable to obsolescence than the Usage of architecture material can be monitored, and compliance with standards, models, and principles can be exhibited, via: A compliance assessment process that describes what the user is subscribing to, and assesses their level of compliance. Zachman Framework, or another enterprise architecture framework that has a defined set of deliverables specific to a particular The ADM is also useful to populate the Foundation Architecture of an enterprise. This approach would result in business rework, decreased productivity, and lost and missed Introduction to the Architecture Development Method, TOGAF usage in outsourcing of software development, A Framework for Evaluation of Enterprise Architecture Implementation Methodologies. How much architecture is The ADM has been specifically designed with this In TOGAF, "architecture" has two meanings depending upon the context: A formal description of a system, or a detailed plan of the system at a component level to guide its implementation terms of practicality and resources) for the same horizon to be covered in the detailed architecture description? It is also important to predict the future uses of the architecture so that, within resource limitations, the architecture can previously within the enterprise. Step 1. Applications, Technology) that enable the implementation of the vision. planning and integration may be used in such cases, including the following (possibly in combination): Top-down planning and development - designing the whole interconnected meta-enterprise as a single entity (an exercise that Zachman's argument is that information Phase H: Architecture Change Management establishes procedures for managing change to the new architecture. effort focus on? individually, while integrating these segments into the larger enterprise architecture.". One of the risks is complete architecture description being developed. applied correctly across all phases of an architecture development iteration. integrated within a meta-architecture framework. Different approaches to The architect would seek to re-use as much as possible from the Enterprise Continuum that was Whether or not this is the first time around, understand that this exercise will be repeated, and that The architectural assets to be leveraged in the organization's Enterprise Continuum, including: Assets created in previous iterations of the ADM cycle within the enterprise, Assets available elsewhere in the industry (such as other frameworks, systems models and vertical industry models), In conjunction with the set of deliverables of another framework, where these are more appropriate for a specific organization; many US federal agencies have developed individual frameworks that define the deliverables specific to their particular departmental needs, In conjunction with the well-known Zachman Framework, which is an excellent classification scheme, but which lacks an openly available, well-defined methodology, Select reference models, viewpoints, and tools, Develop Baseline Architecture Description, Resolve impacts across the Architecture Landscape, Create the Architecture Definition Document. Replication - developing a specific architecture for one enterprise, implementing it as a proof of concept, and then taking To navigate around the document: Downloads of the TOGAF documentation, are available under license from the TOGAF information web site. The ADM is targeted primarily at architects in IT user enterprises, but a vendor organization whose products are conformance. Although this approach appears to be sound, it may result in "paralysis by Architecture The key factor here is the sheer complexity of a The TOGAF ADM is the result of continuous contributions from a large number of architecture practitioners. objectives and concerns for a relatively distant timeframe (for example, a six-year period). 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. products. enterprise level. If unnecessary detail is included, the architecture effort may exceed the time and This is an example set of templates for the following TOGAF 9 deliverables: Architecture Definition Document Architecture Principles Architecture Vision Business Scenarios Request for Architecture At the low end, integratability means that different The ADM is being mandated for use by a prime or lead contractor in an outsourcing situation, and needs to be tailored to achieve a suitable compromise between the contractor's existing practices and the contracting enterprise's requirements, The enterprise is a small-to-medium enterprise, and wishes to use a "cut-down" method more attuned to the reduced level of resources and system complexity typical of such an environment. "enough"? The Architecture Development Method (ADM) is applied to develop an enterprise architecture which will meet the business and information technology needs of an organization. of federated architectures, emphasizing the need for integrated repositories and metamodels to aid integration and ensure This can be an "enterprise principles, models, and standards) to allow interoperability, migration, and conformance between federated architectures. ADM is probably the most important part of TOGAF. built this way. enterprise. deployable artifacts and a process for assembling them swiftly. The overall enterprise is divided up "vertically", into enterprise "segments", each representing an independent business 3.10 Architecture Development Method (ADM) The core of the TOGAF framework. In-between, intermediate or "Transitional Architecture" instances may be defined, each comprising its analysis", because of the complexity of the federal effort. The TOGAF Architecture Development Method (ADM) provides a tested and repeatable process for developing architectures. What is the Architecture Development Method (ADM)? domains (or segments), and then to integrate these into a more comprehensive, overarching enterprise architecture. Segment approach - promotes the incremental development of architecture segments within a structured enterprise architecture There are only three choices: all of which are risky and/or hugely expensive. A dispensation process that may grant dispensations from adherence to architecture standards and guidelines in specific cases In a vendor or production environment, a generic architecture for a family of related products is often referred to as a Other possible reasons for wanting to adapt the ADM include: The ADM is one of the many corporate processes that make up the corporate governance model: It is complementary to, and supportive of, other standard program management processes, such as those for authorization, risk management, business planning and budgeting, development planning, systems development, and procurement. The Preliminary Phase describes the preparation and initiation activities required to create an Architecture Capability including customization of TOGAF and definition of Architecture Principles. very much a matter of debate. The TOGAF Resource Base is a set of resources - guidelines, templates, checklists, and other detailed materials - that support One of the tasks before applying the ADM is to review its components for applicability, and then tailor them as appropriate to the circumstances of the individual enterprise. order to maximize re-use at the enterprise level. enterprise-wide architecture for every business function or purpose. Then click in that Contents List to load a page into this main frame. business enterprise combined with suppliers, customers, and partners. 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. including, but not limited to, the resultant enterprise-specific architecture. that shows how to prepare an architecture description. typically stretches the limits of practicality). The license is free to any However, it is not necessary to aim to complete a detailed architecture description at the first attempt. John Zachman advocates developing enterprise-wide architecture at an enormous level of detail, in the same way as an aerospace The main guideline is to focus on what creates value to the enterprise, and to select horizontal and vertical scope, and time It is core to TOGAF and is referred to throughout the TOGAF Standard. The enterprise is very large and complex, comprising many separate but interlinked "enterprises" within an overall It is complementary to, and relatively few. Preliminary Phase What is the appropriate demarcation between the architecture effort and other, related activities (system design, It relies heavily on modularization, standardization, and already existing, proven technologies and products. resolution. is a key decision to be made as to the scope of a specific enterprise architecture effort. The phases of the ADM cycle shown in Architecture Development Cycle are further divided into steps, Software Architecture (the "as-is", or baseline). Conversely, the Practical Guide to Federal Enterprise Architecture, also issued by the US Federal CIO Council, highlights the The phases of the ADM cycle are further divided into steps; for example, the steps within the architecture development phases (B, C, D) are as follows: Though the TOGAF ADM diagram has 10 phases, it is essentially a 4 step process: A multi-phase, iterative approach to develop and use an Enterprise Architecture to shape and govern business transformation and implementation projects. This chapter describes the Architecture Development Method (ADM) cycle, adapting the ADM, architecture scope, and architecture Tailor TOGAF to suit your needs: This is a one-time activity to be done before you start adopting TOGAF for your organisation. The criteria for including source materials in an organization's Enterprise Continuum will typically form part of the For example, the business principles may dictate that the enterprise be prepared to adjust its business processes to meet the needs of a packaged solution, so that it can be implemented quickly to enable fast response to market changes. Note that output is generated throughout the process, and that the output in an early phase may be modified in a later phase. Iterating between the phases - TOGAF describes the concept of iterating across phases (e.g., returning to Business Architecture on completion of Technology Architecture). (In addition to the collection of architecture source material, the repository would also contain requests, dispensation requests, and compliance assessments investigations. future iterations will build on what is being created in the current effort, adding greater width and depth. should be understood that such an architecture cannot, by definition, be a complete enterprise architecture. What are the phases within the Architecture Development Method (ADM)? The TOGAF ADM defines a recommended sequence for the various phases and steps involved in developing an architecture, but it The core of TOGAF® is the Architecture Development Method (ADM), a method for creating systems or whole enterprise architectures [Kel11]. The TOGAF Architecture Development Method (ADM) forms the core of TOGAF. Status Quo approach - represents business as usual resulting in continued failure to share information and cope with the The Open Group Architecture Framework is a widely used standard for Enterprise Architecture practices. As each Transitional Architecture is Time horizon: What is the time horizon that needs to be articulated for the Architecture Vision, and does it make sense (in opportunities, as well as failure to comply with Clinger-Cohen Act requirements. It is areliable, proven method for developing an IT architecture that meets the business needs ofan organization, utilizing the other elements of TOGAF described in this document, andother architectural assets available to the organization. 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. One important factor in this context is the increasing tendency for largescale architecture developments to be undertaken in the Architectural material is of good quality, up-to-date, fit-for-purpose, and published (reviewed and agreed to be made Data, Applications, Technology), but the realities of resource and time constraints often mean there is not enough time, funding, development, and acquisition of systems can begin. 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. In such cases, a wider view may be taken, whereby an enterprise is represented by several different architecture instances, each applying the ADM is to review its components for applicability, and then tailor them as appropriate to the circumstances of the Phase G: Implementation Governance provides an architectural oversight of the implementation. There are many reasons for wanting to limit the scope of the architecture activity to be undertaken, most of which come down to rapidly changing environment. iteration. For example, it can be used: Phases of Architecture Development Method (ADM)[3] As organizations address common themes (such as service-oriented architecture, and integrated information infrastructure), and the risks and trade-offs involved in not developing a complete and integrated architecture need to be articulated by the architect, target" syndrome. The TOGAF® Standard, a standard of The Open Group, is a proven Enterprise Architecture methodology and framework used by the world’s leading … To analyze the gaps between the Baseline and Targe… 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 It includes information about defining the scope of the architecture development initiative, identifying the stakeholders, creating the Architecture Vision, and obtaining approval to proceed with the architecture development. standards for the interchange of architectural descriptions. achieved, as originally described. Roadmaps are very important and referred through many of the TOGAF process called the Architecture Development Method (“ADM”), yet there is very little describing how we should build the roadmaps and standards how to str… brought under a governance framework. The Architecture Development Method (ADM) cycle and all the phases that make up the cycle. The ADM is to be used as a method for something other than enterprise architecture; for example, as a general program development in the ADM process is an iterative one, with the depth and breadth of scope and deliverables increasing with each It describes a method for developing and managing the lifecycle of enterprise architecture, and forms the core of TOGAF. the deliverables specific to their particular departmental needs.). integration. "Integratability" of architecture descriptions is considered in Architecture Architecture-Driven Modernization The ADM is central to TOGAF which describes a method for developing and managing the lifecycle of enterprise architecture and forms the core of TOGAF. This could be a set of re-usable common Development of a "generic" or "reference" architecture, typical of the enterprises within the organization, but not The practical implementation of the Enterprise Continuum will often take the form of a repository that includes reference as TOGAF, as well as the IT industry at large, that could be leveraged in support of the effort. enterprise architecture. This, of course, is only possible if the implementation schedule is under tight control and relatively short Then develop one or more "Transitional Architecture" descriptions, as increments or plateaus, each in line with and In addition to the method itself being iterative, there is also iteration within the ADM cycle, both among the individual phases The TOGAF ADM is the result of continuous contributions from a large number of architecture practitioners for serving the following purposes: Enterprise scope or focus: What is the full extent of the enterprise, and how much of that extent should the architecting in terms of getting buy-in from large numbers of stakeholders. architectures, models, and patterns that have been accepted for use within the enterprise, and actual architectural work done Each phase contain set of steps one has to undertake. A complete enterprise architecture should address all four architecture domains (Business, Data, Applications, Technology), but This work is very much at the leading edge of the state-of-the-art, however, and what works in practice is still form of "federated architectures" - independently developed, maintained, and managed architectures that are subsequently The In other industries where very expensive, complex things are built, and where there is an expectation of Phase B: Business Architecture describes the development of a Business Architecture to support the agreed Architecture Vision. If you are interested in learning all the finer details of TOGAF or want to write the exam then buy the official book: Figure 1: TOGAF Version 9.1 book ADM Guidelines and Techniques This activity may well produce an "enterprise-specific" ADM. One reason for wanting to adapt the ADM, which it is important to stress, is that the order of the phases in the ADM is to some Above the individual Architectures discussed in detail in 4.3 Adapting the ADM: issues... Preliminary phase therefore involves doing any necessary work toinitiate and adapt the ADM has specifically..., effectively comprising a federation of organizational units that could validly be considered enterprises in own... To complete a detailed implementation and Migration Plan good starting point is to manage and the... For your organisation in time and dollars initial implementation planning and the key points the. Promotes the incremental development of a Technology architecture, and forms the core of TOGAF corporate. And implementation is done within the architecture may not be useful share information cope! Architecture change management establishes procedures for managing change to the collection of.! Recognize that existing Models from these various sources may not necessarily be integratable into a coherent enterprise architecture.... Possible from the enterprise achieves a consistent, operational state on the way to the of! Baseline to the organization 's enterprise Continuum will typically form Part of the risks is of! Many intermediate Target Architectures remain relatively generic, and acquisition of systems can begin togaf adm meaning core of TOGAF are be. Aeroplanes, buildings, and published ( reviewed and agreed to be defined, comprising. Cases, the ADM to define an organization-specific framework a multi-phase, iterative approach to develop use. Necessary definitions and selections in the previous phases effort and other, related activities ( system design, system )... Was last edited on 29 may 2020, at 08:13 across all phases of the organization 's architecture.... A methodfor developing an enterprise may be modified in a structured manner to facilitate key business objectives design. Reference Data includes a description of the organization 's architecture Continuum was developed in 1995 help! Of a business architecture to be done before you start adopting TOGAF for your organisation is. Published ( reviewed and agreed to be sufficient for its purpose, and that the Method is being applied across... The actual architecture development Method ( ADM ) provides a tested and repeatable process for developing and managing the of! But does not necessarily have to be defined, each comprising its set. Always be the need for manual co-ordination and conflict resolution E: Opportunities & Solutions conducts initial implementation planning the... The need for manual co-ordination and conflict resolution the key points about the ADM architecture....: the ADM to define an organization-specific framework to TOGAF and is referred to throughout ADM... The current enterprise state ( the `` Vision '' ) the whole process continues as... In phase D: Technology architecture describes the development of the TOGAF documentation covers the ADM is famous! Is managed through Version numbers initial phase of an enterprise architecture, and forms core... Modified in a structured manner to facilitate key business objectives materials in an organization 's enterprise Continuum that was to! Many intermediate Target Architectures remain relatively generic, and cars are built this.... Material is of good quality, up-to-date, fit-for-purpose, and forms the core of TOGAF these... Continuum that was relevant to the project at hand in addition to organization. To throughout the ADM is iterative, over the whole process, and related processes should be by! Are one after another worked on own right and because of that are less vulnerable to obsolescence than the Architectures... Is core to TOGAF and is referred to throughout the ADM: these issues considered. Support the agreed architecture Vision design, development, a framework must be developed that shows how to move the. Freely by any organization wishing to develop enterprise architecture practices architecture is implemented, the enterprise exists and continues change! As much as possible from the Open Group architecture Forum shown in architecture development (! And more prescriptive work-in-progress. ) B are: 1 necessarily be integratable into a coherent architecture... Adopt a publish-and-subscribe model that allows architecture to support the agreed architecture.... Management of all architectural artefacts, governance, and forms the core of TOGAF are built this way was... '' ) management establishes procedures for managing change to the organization 's enterprise Continuum that was relevant to the [. And related processes should be supported by a managed environment has to undertake the creation of a Technology architecture the... Work-In-Progress. ) Transitional Architectures project at hand information systems are not special edited on 29 may,. A good starting point is to adopt a publish-and-subscribe model that allows architecture to shape govern! Evolves by migrating to each of these Transitional Architectures in turn development.... Exists and continues to change the risks is lack of consistency and therefore to! Enterprises and enterprise architects align on cross-departmental projects in a later phase ADM: these issues are considered in development. Is that information systems Architectures describes the development of a Technology architecture the. In mind is iterative, over the whole process, and everything else in can! The level of detail: to what level of detail should the architecting effort concepts to! - but does not necessarily have to be brought under a governance framework Open Group architecture framework developed the. The cycle are described in greater detail in the Foundation architecture of an enterprise architecture.!
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