A technology strategy has traditionally been expressed in a document that explains how technology should be utilized as part of an organization's overall corporate strategy and each business strategy. In the case of IT, the strategy is usually formulated by a group of representatives from both the business and from IT. Often the Information Technology Strategy is led by an organization's Chief Technology Officer (CTO) or equivalent. Accountability varies for an organization's strategies for other classes of technology. Although many companies write an overall business plan each year, a technology strategy may cover developments somewhere between 3 and 5 years into the future.