What is Enterprise Architecture — and why most Australian companies don't have one

Enterprise Architecture (EA) is one of those terms that gets thrown around a lot — in job ads, strategy decks, and vendor pitches — without anyone really agreeing on what it means.

At its core, EA is the discipline that connects your technology decisions to your business outcomes. It answers the question: how should our organisation's technology landscape be structured so that we can achieve our strategic goals?

The four EA domains

Traditional enterprise architecture covers four domains: Business Architecture, Information Architecture, Application Architecture, and Technology Architecture. Good EA maps their interdependencies and uses that map to make better decisions.

Why most companies don't have it

The honest answer: because it feels expensive and abstract. The perceived cost is immediate; the benefit is longer-term. But the companies that invest in EA consistently outperform those that don't — because they spend less money rebuilding systems that were poorly designed the first time.