A system operation management server computer (server) and related methods are disclosed. The server is programmed to learn the features of and relations among computer devices from various types of data related to the computer devices and build a knowledge graph (KG) to represent IT infrastructure. The server is also programmed to manage a collection of issue resolution rules each mapping the states of certain computer devices that characterize a known issue and a known resolution of the known issue. In response to receiving a support bundle that contains data related to a target computer system that has encountered an unknown issue the server is programmed to determine which issue resolution rules are applicable to the support bundle based on the KG and transmit a recommendation for resolving the unknown issue.