Since modelling, monitoring and analysis are essential elements of an air quality management plan; it is beneficial to deal with them as an integrated whole. In today's terms, this means through the use of a computer-based information and analysis system. This type of system allows the user to input emissions information, automatically format it for use in an air pollution dispersion model, run that model and insert the results into a planning tool that can be used to develop strategies for improving air quality in an area.