A computing environment includes an originating system, a plurality of networked communication channels each configured to communicate one or more of a plurality of instructions for calling one or more downstream applications in response to calling of an originating application by the first system, and a resource dependency system for providing automatic resource dependency tracking and maintenance of resource fault propagation. The resource dependency system performs a query configured to identify any application calls performed in a predetermined period of time; for each identified application call, builds a corresponding transaction paragraph comprising a list of all sub-application calls performed in response to the application call; from each transaction paragraph, extracts a chronological sequence of sub-application calls found in the transaction paragraph; forms a tier pathway for each transaction paragraph; and stores each tier pathway in an accessible file.