SOA: A more pragmatic approach to IT Peter Evans-Greenwood

Service-Oriented Architecture We can't solve problems by using the same kind of thinking we used when we created them!

Environmental changes enable a new approach to IT U.S. software sales in billions of dollars Source: INPUT SOAP 1.0 WS-I founded SAP WS J2ME Web Services ESB Apache SOAP MS SOAP IBM Web Services Apache Axis JAX-RPC Oracle WS Sun WS WS (J2EE & .NET) WS-* starts exploding WS-* OASIS SOA Reference Model OASIS SOA Blueprints SAP Netweaver Oracle Fusion JAX-WS MS Indigo BPEL BizTalk 2004 Oracle BPEL WBI-SF WS-Policy and WS-Security 2004 2005 2003 2002 2001 2000 1999 Yesterday Today Tomorrow

We’ve tried both ends of the planning spectrum Bottom up action Reacting to changes in the environment No conscious plan Solutions created to meet pressing needs Only addressing needs as understood that time Top-down planning Days spent filling Zachman cells Major transformation initiatives Initiatives behind by people on the ground who need to get the job done Reactive Omniscient Both result in inflexible systems-of-systems

Bottom up action

Reacting to changes in the environment

No conscious plan

Solutions created to meet pressing needs

Only addressing needs as understood that time

Top-down planning

Days spent filling Zachman cells

Major transformation initiatives

Initiatives behind by people on the ground who need to get the job done

People use a more pragmatic planning process Establish our goal Understand where we are on the landscape Consider the paths available to us Choose one and head to the junction Return to step 1

Establish our goal

Understand where we are on the landscape

Consider the paths available to us

Choose one and head to the junction

Return to step 1

SOA enables a similar approach for IT Business Service Architecture IT Landscape Business goals and activities are reified in a service architecture The service architecture acts as a planning framework

We can use city planning as a metaphor A long term plan Work with the business landscape Create stable infrastructure Manage the process Appoint a zoning board Make the most of what you have City planners try to preserve viable old assets, to replace outmoded assets, and to add new assets—all in the context of an infrastructure linking them coherently. IT developers have a good deal to learn from that approach. Jürgen Laartz, Ernst Sonderegger, and Johan Vinckie, The Paris Guide to IT Architecture McKinsey Quarterly, 2000, Number 3,

A long term plan

Work with the business landscape

Create stable infrastructure

Manage the process

Appoint a zoning board

Make the most of what you have

Service architecture provides a planning framework Business Service Architecture IT Landscape Optimize new product introduction Reduce costs Improve process efficiency Manual processes No support for product management Multiple, redundant, applications Capture business in service architecture Identify scenarios by determining miss-match between current IT and service architecture Make a tactical decision on which scenario to deliver, and execute Return to 1 or 2

Optimize new product introduction

Reduce costs

Improve process efficiency

Manual processes

No support for product management

Multiple, redundant, applications

Capture business in service architecture

Identify scenarios by determining miss-match between current IT and service architecture

Make a tactical decision on which scenario to deliver, and execute

Return to 1 or 2

Scenarios deliver well defined business capabilities Each scenario defines Capability delivered Optimize new product introduction Support multi-channel delivery of services to customers Streamline supplier interactions Reduce maintenance costs by consolidating IT assets, freeing up cash for investment Cost, and associated risk Aligned with the business activities effected by the capability Detailed business requirements Technology footprint required New and existing applications New and existing business and technical services Impact on legacy systems Specific technologies required: SOA, BPM, rules engines, MDA, agents, etc.

Each scenario defines

Capability delivered

Optimize new product introduction

Support multi-channel delivery of services to customers

Streamline supplier interactions

Reduce maintenance costs by consolidating IT assets, freeing up cash for investment

Cost, and associated risk

Aligned with the business activities effected by the capability

Detailed business requirements

Technology footprint required

New and existing applications

New and existing business and technical services

Impact on legacy systems

Specific technologies required: SOA, BPM, rules engines, MDA, agents, etc.

SOA provides a more pragmatic approach to IT Strategic Differentation ROI Tactical Flexability Agility Balancing tactical and strategic concerns

Strategic

Differentation

ROI

Tactical

Flexability

Agility

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