Avancier Methods (AM) CONCEPTS

Size: px

Start display at page:

Download "Avancier Methods (AM) CONCEPTS"

Conrad Snow
5 years ago
Views:

1 Methods (AM) CONCEPTS Mapping generic ArchiMate entities to and TOGAF meta model entities It is illegal to copy, share or show this document (or other document published at ) without the written permission of the copyright holder Copyright Limited

2 TOGAF s buildings blocks archtiectural entities An architectural entity is a building block of architecture description, used in artefacts. TOGAF s meta model of architectural entities is underpinned by two big ideas: s (the designed structure of a system) offer services (the required behaviour of a system). components are defined before physical (implementationspecific) components. The following slides analyse TOGAF s meta model and text Note that there are many odd things not explored here! Copyright Limited

3 A classification of 26 TOGAF entities s classification TOGAF s architectural entities Motivation entities Driver, Goal, Objective, Measure Architecture domain Data s Technology External behaviour Product,, Quality, Contract Information system service Platform Internal behaviour, Event, Control structure Capability,, Role,, Data Technology structure, Organization Unit, Data Technology Copyright Limited

4 domain relationships (after TOGAF) Capability Contract Contract Control Driver Driver Driver Event Event Event Event Event generates resolves interacts with Performs operates in belongs to participates in performs task in consumes is delivered by governs and measures meets ensures correct operation of creates unit motivates is resolved by is generated by is resolved by is generated by is resolved by Event Event Organization Unit Role Work Package Quality Driver Goal Organization Remarkably actor centric Should actor be role? Role Organisation Copyright Limited

5 supports is performed by communicates with is owned by supports is realized by can be accessed by Organization Unit Role here as in conventional structured analysis is bounded by Goal Goal addresses Driver Goal Goal is realized through Objective contains contains Organization Unit Measure Measure Measure Measure sets performance criteria for sets performance criteria for Objective Organisation Objective realizes Goal Objective Objective is tracked against Measure Objective Role Organization Unit contains Organization Unit is motivated by Driver Organization Unit owns Organization Unit operates in Organization Unit Organization Unit produces Organization Unit Product Organization Unit owns and governs Copyright Limited

6 involves is guided by generates Control Event resolves orchestrates Event precedes/follows produces orchestrates Product Organisation Product is produced by Organization Unit Product Role is produced by is performed by Role Role accesses Role Role is provided to is governed and measured by resolves provides governed interface to access Contract Event More conventional structured analysis? is tracked against Measure is owned and governed by Organization Unit supports is realized by consumes Quality meets applies to Quality Contract Elementary / Organisation Quality applies to Work Package delivers Capability Copyright Limited Role

7 Data domain relationships (after TOGAF) supplies/consumes relates to is processed by [IS] resides within is accessed and updated through contains Data Data Data Data Data operates on encapsulates is extended by Data Data encapsulates Data Data Data is hosted in extends Data Data encapsulates Data Data provides consumes Copyright Limited

8 S domain relationships (after TOGAF) contains operates on [IS] communicates with is extended by implements Data is hosted in extends encapsulates Data Data communicates with is realized through Copyright Limited

Technology domain relationships (after TOGAF) contains Technology Technology Technology Technology is dependent on Technology Technology is extended by Technology Technology supplies Platform

9 Technology domain relationships (after TOGAF) contains Technology Technology Technology Technology is dependent on Technology Technology is extended by Technology Technology supplies Platform Technology provides platform for is realized by Technology Technology Technology is hosted in extends Technology [IS] Platform Technology realizes Technology Technology Platform is dependent on is supplied by Technology Technology Technology Data Technology is implemented on Technology Data Technology Copyright Limited

10 Meta model diagram so far [] Model with relationships you can find in TOGAFs explicit meta model Role Organisation But not all the relationships implied by the text and artefacts Data [IS] Platform Technology Data Technology Copyright Limited

11 A model of entities and relationships in TOGAF Relationships in the explicit meta model Plus 6 more found the in TOGAF artefacts found below! Role [] Organisation Role/ Matrix / Matrix /Organization Matrix / Matrix Use-Case Diagram Interface Catalog Data Flow??? Data Data [IS] Technology Data Apps Technology Platform Technology Copyright Limited

12 Mapping TOGAF to Zachman? (sans when and why) Who? What? How? Where? Ideal External Behaviour Internal Behaviour [] [IS] Platform structure Role Data Technology Real structure Organisation Data Copyright Limited Technology

13 Mapping of logical to physical Phases B, C, D Required services and processes are mapped to logical ABBs in the Architecture Definition doc are means implementation independent to Technology Realised by IS Platform Implements Supplied by Behaviour to Structure bounds Role Data App Tech Org Unit Data App Tech Encapsulates Realizes Phase E SBBs in the Road map (and Transition Architectures) are supplier and technologyspecific Copyright Limited

14 BCS generic meta model of activity systems External Starter, Main course Order, Cook, Serve Internal Behaviour Something consumers want from the system, or the system wants from suppliers. A result of processes, but defined in a service contract without reference to the internal logic of processes used. What happens. A logical sequence of activities that ends up delivering a service at some level of granularity. Executed by components. Structure A structured collection of services (to the left) that is requested or provided by one or more components (below). Interface A subsystem that does work. A group of related but distinctly invokable activities, encapsulated behind a provided interface. Menu Chef Oven Copyright Limited

15 Mapping BCS generic meta model to architecture domains Generic meta model meta model Interface (SLA) Unit Interface s meta model IS Interface (UI) Infrastructure meta model Platform Technology Interface (API) Technology Copyright Limited

16 Mapping BCS generic meta model to ArchiMate - Generic BCS process = behavioural element BCS component = structural element Interface Interface Structural element Behavioural element Copyright Limited

17 Mapping BCS generic meta model to ArchiMate - BCS = or? BCS = Role and = and? Interface service interface process function Role Copyright Limited

18 Mapping BCS generic meta model to ArchiMate - Apps BCS =? Interface service interface function component Copyright Limited

19 Mapping BCS generic meta model to TOGAF - generic Not clear if different authors have the same model in mind Interface Contract?? ABB???? SBB?? Copyright Limited

20 Mapping BCS generic meta model to TOGAF - business Does TOGAF s service = service or interface? Does TOGAF s logical = technology-independent or external? Interface Contract???? (Activity) Organisation Unit Copyright Limited

21 Best fit to TOGAF business? provides governed interface to access is owned and governed by Organization Unit supports is realized by consumes decomposes is owned by Organization Unit supports is realized by is bounded by decomposes communicates with a specific function explicit, defined boundaries a defined, measured interface contracts with consumers is realised by is bounded by provides to its customers, both internally and externally are performed by A unit of business capability Correlation of organization and functions a flow of interactions between functions and services the flow of execution for a function (or Activity) orchestrates Organisation Unit orchestrates decomposes orchestrates decomposes decomposes precedes/follows Organization Unit owns Organization Unit owns and governs Organization Unit decomposes Organization Unit Copyright Limited

22 Mapping BCS generic meta model to TOGAF - apps BCS = IS Interface Contract?? App?? System App Copyright Limited

23 Best fit to TOGAF apps? provides governed interface to access is realized through App implements App Implements App decomposes App App communicates with App App is extended by App Automated element of behavior provides specific functionality in response to requests has explicitly defined Interface IS (or App) Have associations to interfaces is realised through independent of a particular implementation Encapsulation of application function Realises Implements Extends Use-Case Models can describe systems functions System (or App) Encapsulation of functionality deployable component of functionality Alllocated to App extends App App encapsulates App App decomposes App App communicates with App Copyright Limited

24 Footnotes on what TOGAF says The organization s Portfolio is captured as a catalog. Catalogs are hierarchical and capture a decomposition of a metamodel entity : An encapsulation of application functionality that is aligned to implementation structuring. Copyright Limited

25 Structural (component) decomposition in TOGAF Catalogs are hierarchical and capture a decomposition of a metamodel entity TOGAF s are components of a structure. They are subsystems not processes. Copyright Limited

26 Structural views of components An Communication Diagram is a Data Flow Diagram (rather than a Flow Diagram Boxes are s (rather than s) Arrows are data flows (rather than control flows) Copyright Limited

27 Behavioural (process) decomposition in TOGAF three approaches can be utilized in sequence to progressively decompose a business. Structured Analysis Identifies the key business functions within the scope of the architecture, and maps those functions onto the organizational units within the business. Use-case Analysis The breakdown of business-level functions across actors and organizations allows the actors in a function to be identified and permits a breakdown into services supporting/delivering that functional capability. Modeling The breakdown of a function or business service through process modeling allows the elements of the process to be identified, and permits the identification of lower-level business services or functions. TOGAF TOGAF fudges System v. process decomposition Internal process v. external service However, it is clear that Use cases are processes models describe processes So this is process decomposition, or stepwise refinement (Wirth, 1971) Copyright Limited

28 s as Use Cases (i.e. processes) Use-Case Models can describe either business processes or systems functions, depending on the focus of the modeling effort. TOGAF A system use case is a process with a main path and alternative paths is a high-level is NOT a component may involve several s App s can be decomposed into smaller s, each performed by an Copyright Limited

29 Structural and behaviour views : An encapsulation of application functionality TOGAF Elementary App s are Grouped by cohesion criteria into App s Orchestrated in sequence by higher App s Identity Management Data Identify Auth enticate Authorise Access Close Read Update Delete Copyright Limited

30 s as external view of Encapsulation of application function as s Information System : has a defined, measured interface has contracts with consumers of the service. has associations to SOA service interfaces. This appears to be an internalexternal distinction An describes s required or performed to deliver one or more IS s An encapsulates one or more s, describes a recognised by an User might be an aggregate of elementary s Copyright Limited

Avancier Methods (AM)

Avancier Methods (AM) Methods (AM) DOUMENT Architecture matrices and their uses It is illegal to copy, share or show this document (or other document published at http://avancier.co.uk) without the written permission of the