This year, we’re going to plan to deliver more with less. We’re going to enhance infrastructure resilience. We’re going to manage our resources more effectively. We’re going to do a lot of things—or at least we plan to—this year. How, exactly, will that get accomplished without a business strategy?
Enterprise architecture provides the operating principles for an organization. It’s the layer above business and technology capabilities that defines the core tenets of the business strategy.
Enterprise architecture and IT architecture are commonly confused. They are, in fact, similar terms, but the intents radically differ. Enterprise architecture intends to define the degree of standardization and integration; e.g., what data is shared. The intent of IT architecture is to define the interrelationship between technology components; e.g., how a technology component is leveraged across a technology ecosystem.
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Source: IT Strategy