An apparatus for automatically analyzing the impact of changing a business requirement on an IT infrastructure of an enterprise. A request is received to perform an analysis of an impact on the enterprise by changing a particular instance of the business requirement. A model repository is queried to determine which IT assets of the enterprise are impacted by changing the particular instance of the business requirement. An impact relevant subset of a topic map is received from the model repository representing the impact on the enterprise by changing the particular instance of the business requirement that includes the particular instance requirement as a root node and only those specific assets impacted by changing the particular instance requirement as connected nodes. Then, the impact relevant subset of the topic map representing the impact on the enterprise by changing the particular instance of the business requirement is outputted on an output device.