Another workstream that could make up an Enterprise Information Architecture might be Business Intelligence. This workstream will have its hands full with unravelling the plethora of theory and practices around BI. However, it is again firstly important for the buiness to be clear about its expectations of BI and, accordingly, what it wants to invest in it. BI really ends up being a discipline that gets adopted by the business and IT in partnership for it to be successful and to add value. Various tools and technologies are available to support BI, and these should be decided in principle to avoid different business units acquiring their own. I have seen the mess that an organisation can find itself in if this is allowed to happen – disparate sources of data, disparate tools to mine it and huge effort to co-ordinate the results.