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Steering the Northwest PassageBeginning an SOA Initiative

Ian Robinson, ThoughtWorks

http://iansrobinson.com

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Overview

Where to Start?Stories and CapabilitiesServices and ContractsDelivery

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Where to Start?

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Becketts Dilemma

Client: Midstream oil and gas

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A Map of the Territory

Who?What For?

Why? What? How?

Stakeholders

Outcomes

Benefits

Forces

Obstacles

Capabilities

Processes

Technologies

want deliver

motivateprevent

realise

implemented by

automate

People

provide

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Stories, Capabilities, Services and Contracts

Stories Capabilities

ServicesContracts

Describe goals& outcomes

Resources torealiseoutcomes

Hostcapabilities

Assert

interactionsbetweenservices

What

How

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Stories and Capabilities

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Communication Barriers

B

usiness

Folk IT

IT

Business Process Disorder

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People Change, Processes Change, Technologies Change

Ho

w

What Source

spare parts

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Questions, Questions

How (well) do you implement this capability today?

Is it core to your business?

Does itdifferentiate you fromyour competitors?

Whos responsible for itsexecution when systems fail?

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User Stories

AsaIwantSothat

Value

OutcomesOutsidein

Externalbehaviour

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Role ValueStory

Outcome

Capability

Features: Outcomes and Capabilities

Feature

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OutcomeFocused Stories

AsaIwantSothat

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ResponsibilityFocused Stories

AsIamresponsib

lefor,Whichdelivers

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Business Entity Domain Model

Client: Financial services

party

applicationform

address

account

position

policy

tax region

id accountportfolio

Trade financialmarkets

Processapplication

Managecustomer

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The Entity Lifecycle

pre-lead lead applicant new active

dormant

closed

debtor

qualifiesself applies accepted trades

Client: Financial services

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Capability Map

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Capability Map

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Capability Map

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Capabilities Drive the Entity Lifecycle

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Once more, with feeling!

Client: Midstream oil and gas

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Aha!

Client: Midstream oil and gas

Move production Transformproduction

Crude connected to terminalDiluent connected to terminalLab analysis complete

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Services and Contracts

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ThreeLayered Architecture

Business

Presenta,on

Data

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And Now: At Distributed Proportions!

Ac,vity

Process

En,ty

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Services Host Capabilities

Capabilties

Activities

Activities

compose

Capabilties

implemented by

compose

Process integrity

Composability

new EnterpriseApplication()

f()

f()

f()

f()

f()

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Treat Services as Consumers

AsordermanagementIwanttoknowwhenaproducthaschangedSothatIcanfulfillordersbasedoncurrentofferings

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Events Satisfy Consumer Expectations

ProductManagement

RegionalDistribution

OrderManagement

Inventory

Product Updated Product Updated

Product Updated

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Communicate Consumer Contracts

ConsumerDrivenContract

ConsumerContract

ConsumerContract

Provider Contract

adopt

adopt

communicate

communicate

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Delivery

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Continuous Planning

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Capability Delivery

Longlived capability deliveryteams

Visiting projects contributecapital and resource

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Multiple Delivery Streams

Client: Communications and entertainment

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Thank you

http://iansrobinson.com