Analytical tools enable a user to add-value to raw data that may have been collected at great expense. GIS tools are reuired to create useful information from geographical data and if you examine any definition of GIS you will find that the ability to perform spatial analysis is a key feature. The purchase and implementation of GIS software, however, is usually a business decision and has to be justified in terms of efficiency and effectiveness. Whilst many make the case for this investment on the grounds of more efficient data management it is primarily through geographical analysis that an organisation improves its' effectiveness - by solving problems and making better decisions.