Method, computer program product and computer system for assigning a direction of impact to an association between assets based on an impact of an event mapped to at least one of the assets. To assign a direction of impact, a first topic map meta-model is created that identifies assets and events in a topic map based index with instance ontology based on a topic map meta model that identifies assets and a topic map meta-model that identifies events. An identification is assigned in the first topic map meta-model to at least one association between at least one asset of the topic map meta-model that identifies assets and at least one event of the topic map meta-model that identifies events and a second topic map meta-model being created that identifies at least one association and instance ontology with direction of impact assigned to the at least one association in various scopes.