Functional decomposition in a contemporary “business …grahamberrisford.com/00EAframeworks/03TOGAF/AMTOGpapers... · 2018-07-20 · This slide show shows how Functional Decomposition

Avancier

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

Copyright Avancier Ltd 2018

https://www.informatica.com/content/dam/informatica-com/global/amer/us/collateral/white-paper/Introduction-to-BOST-Framework-Reference-Models-whitepaper_2753.pdf

















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


BOST

BusinessBusiness view

Operations view

ITSystems view

Tecnhology view



















https://www.cisco.com/c/en/us/solutions/collateral/enterprise/cisco-on-cisco/Cisco_IT_Trends_in_IT_Article_Ent_Architecture_IT_Service_Management.html





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


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


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


BOST


Operations view

ITSystems view

Tecnhology view

AvancierBOST Operations view

► The Service Function Model

► The Enterprise Information Model

► The Create/Use Matrix


BOST


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]


BOST


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


► “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.”

Avancier


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]


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.”


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.”


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”


Avancier

Mapping one basic service function to the information subjects it creates and uses


Avancier

A create and use matrix


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]


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


BOST


Operations view

ITSystems view

Tecnhology view

AvancierBOST System view

► Systems Families

► Systems Family Spider Diagrams

► Reference Systems



high level application/function matrix system family diagram

high level application communication

diagram

spider diagram

interface (between applications) information exchange

BOST


Operations view

ITSystems view

Tecnhology view

AvancierMapping system families (application groups) to major functions


AvancierSystems Family Spider Diagrams

► Shows data flows between (applications in) system families


AvancierReference systems and information subjects

► “The required set of Systems of Record for creating and

maintaining [one set of] Information Subjects.”


AvancierBOST Technology view

► Technology Services Reference Model [TRM]

► Technology Devices Model [hardware]


BOST


Operations view

ITSystems view

Tecnhology view


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


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

Avancier


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


Functional decomposition in a contemporary “business …grahamberrisford.com/00EAframeworks/03TOGAF/AMTOGpapers... · 2018-07-20 · This slide show shows how Functional Decomposition

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