To test the workability of the system in adapting to different planning scenarios, all the different factors for site selection of different facilities and land use were built into the SDSS in such a way that their potential sites can be selected. Factors for selecting potential sites for planning were built into the system because of their significance in affecting the built environment, with respect to the spatial distribution of physical developments vis-à-vis their interactions with the environment. This module of the system was designed in such a way that different values can be specified for different land use.