Here I explain, what the business-driven characteristic of SOA means.
business-driven characteristic of the service-oriented architecture model
Traditional technology architecture is in alignment with the business at first (after delivery), but after a while the alignment decreases with the evolution of the business. As business and technology architecture get completely out of sync, it gets to the point, that a completely new technology architecture is needed.
The business-driven characteristic results in a constant sync between business and technology architecture, so that no completely new technology architecture is required.