There are several ways to describe information systems strategy. Some authors have talked about it as the plan developed by the IS function to support corporate strategy. Basic IS strategy typologies range from simple ones focusing on the role of the IS function (e.g., cost reduction vs. differentiation) to more complex formulations involving a variety of infrastructure and process dimensions.'We view IS strategy as multi-dimensional, including the IS role (efficient,
comprehensive, opportunistic), the IS sourcing arrangement (outsourcing, selective sourcing, insourcing), and the IS structure (centralized, shared, decentralized).