In a constantly changing business and social environment, organisations in both commercial and public sectors must continuously adjust priorities and react to internal and external demands. In the majority of cases, the IT function has been seen as an inhibitor of change, burdened by isolated systems, a lack of interoperability, and a poor track record of delivery. However, if organisations are to become truly agile, they must develop an approach to IT that incorporates flexibility in all aspects; from architectural design through to models of delivery.