The real advantage, actually, is the ability to assemble and reassemble the services quickly. And the benefit this advantage confers is agility. Not the agility of agile software development, but true business agility, which is elegantly defined by Jason Bloomberg, senior analyst at ZapThink, a Waltham, Mass.-based consultancy, as “the ability of a company to respond quickly and efficiently to change and to leverage change for competitive advantage.” (Although there are other definitions of SOA, this one seems to be the most inclusive.)

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