functional decomposition in a contemporary “business...
TRANSCRIPT
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Functional decomposition in a contemporary “business
transformation framework”
Mapping TOGAF® to BOST
This document is based on quotes and screenshots from:
https://www.informatica.com/content/dam/informatica-com/global/amer/us/collateral/white-
paper/Introduction-to-BOST-Framework-Reference-Models-whitepaper_2753.pdf
And an older “Proact” slide show by Art Caston
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AvancierBOST “business transformation framework”
► Informatica promote BOSThttps://www.informatica.com/content/dam/informatica-com/global/amer/us/collateral/white-paper/Introduction-to-BOST-Framework-Reference-Models-
whitepaper_2753.pdf
► CISCO promote BOSThttps://www.cisco.com/c/en/us/solutions/collateral/enterprise/cisco-on-
cisco/Cisco_IT_Trends_in_IT_Article_Ent_Architecture_IT_Service_Management.html
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BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
AvancierMapping TOGAF to BOST
► This slide show shows how Functional Decomposition is used in a
the Business Transformation Framework callled BOST,
■ Similar to the functional decomposition referred to in TOGAF 8 and 9.
► It shows much else in BOST is comparable to TOGAF
► But beware terminology torture. E.g.
■ BOST uses function and capability interchangeably
■ And uses service where TOGAF might say component
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AvancierBusiness planning context for EA
► “Business planning at the strategy level provides the initial direction
to Enterprise Architecture”. (TOGAF Ch. 5)
► It may be concerned with changes to an enterprise’s
■ market
■ products
■ partners
■ resources
■ business operations
► It directs EA
► It is informed by EA
► TOGAF picture
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Business
Direction
AvancierBOST Business view
► “Market Model”
■ industry domain/sector/segment, customers and suppliers
► “Product Model”
■ products and services, sales and service channels.
► “Enterprise Relationship Model”
■ partners, in-sourcing and out-sourcing of operations
► “Enterprise Resource Model”
■ people, machines, locations/buildings and other physical asset types
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BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
AvancierBOST Operations view
► The Service Function Model
► The Enterprise Information Model
► The Create/Use Matrix
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BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
AvancierThe Service Function Models
► “the central component of the Operations View.
► a structured definition of all essential operations capabilities
► using a service-based approach.”
■ [meaning component/flow-based]
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BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
TOGAF term BOST term
function service function or capability area
node connectivity diagram service flow model
information exchange service flow
bottom level business function basic service function
data entity/business function matrix create/use matrix
create/use action information flow
data entity (aggregate) information subject
Avancier5 major functions in a retail industry EA reference model
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► “Functions are:
■ Independent of organization
■ Independent of where work
is performed or who
performs it; and
■ Independent of how the
work is performed.
► grouped or clustered using
functional affinities
► decomposed into Service
Functions.”
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External Entities represent
enterprises, customers, or
institutions with which the
enterprise interacts.
Decomposition to 2nd and then 3rd level
AvancierBottom (here 3rd) level service flow model
► “Service Functions and
External Entities are
linked by Service Flows.”
► All Services are unique
to only one function,
resulting in minimal
ambiguity and no
duplication.”
► [note that service = output
flow]
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AvancierFunctions
► “Each Function is defined as a Service Producing Entity
■ not as a step in a process.
● [note that service = output flow]
► Service Functions describe “what” capabilities are required
■ not “how” they are performed.
● [note that functions represent capabilities]
► There is only one instance of a particular Service Function for the
entire enterprise
■ regardless of how often that function exists throughout the organization
or across geographic locations.”
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AvancierFunctional decomposition
► “Decomposition continues until Service Functions can no longer
represent the capabilities; that is, when “what” becomes “how“.
■ [Typically at a 3rd or 4th level of decomposition]
► “At their lowest level, Service Functions are called Basic Service
Functions.”
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AvancierThe Enterprise Information Model
► “Define and cluster information
subjects required to operate
the Business...
► starts by identifying major
Information Domains based
on information affinities.”
► “Each domain is
decomposed... for three or four
levels until the definition of
information subjects is about
the same granularity as the
Service Functions”
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Mapping one basic service function to the information subjects it creates and uses
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A create and use matrix
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AvancierThe create/use matrix
► “For each Basic Service Function
► information flows link functions to the information subjects that they
both create and use.”
► [Note that information subjects are aggregate (rather than
normalised) data entities, or even logical data components]
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TOGAF term (phase C) BOST term
bottom level business function basic service function
data entity/business function matrix create/use matrix
create/use action information flow
data entity (aggregate) information subject
AvancierFrom business to IT
► Note that coarse-grained data entities/components were defined in
the business operations view
► We turn now from business to IT, and to the systems (meaning
applications) view
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BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
AvancierBOST System view
► Systems Families
► Systems Family Spider Diagrams
► Reference Systems
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TOGAF term BOST term
high level application/function matrix system family diagram
high level application communication
diagram
spider diagram
interface (between applications) information exchange
BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
AvancierMapping system families (application groups) to major functions
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AvancierSystems Family Spider Diagrams
► Shows data flows between (applications in) system families
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AvancierReference systems and information subjects
► “The required set of Systems of Record for creating and
maintaining [one set of] Information Subjects.”
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AvancierBOST Technology view
► Technology Services Reference Model [TRM]
► Technology Devices Model [hardware]
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BOST
BusinessBusiness view
Operations view
ITSystems view
Tecnhology view
TOGAF term BOST term
Technology Component (software) Business Application
Infrastructure Application
Platform Application
Technology ServiceApplication Service
User Productivity Service
Foundational Services
User Platform Services
Service Platform Services
Network Services
Technology Component (hardware) Technology Device
AvancierTechnology Services [Components] Reference Model
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TOGAF term (TRM) BOST term
Business Application Application Service
Infrastructure Application User Productivity Service
Platform Application Foundational Service
User Platform Service
Service Platform Service
Network Service
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AvancierTechnology Devices [Components] Model
► User Devices
■ personal computing and communications equipment as well as output
and display devices;
► Computing Devices
■ server environments for applications;
► Network Devices
■ switches and routers and associated transmission control equipment
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