1. A management system that manages a plurality of information processing apparatuses, comprising: a network interface receiving management information from each information processing apparatus; a processor determining a status of the information processing apparatus based on the management information; a memory storing the status of the information processing apparatus, and a plurality of analysis rule information for identifying a cause apparatus, which is the cause of the status; and a display device displaying the status of the information processing apparatus, wherein the memory stores a plurality of analysis result information which includes cause information denoting the cause of failed apparatus, one or more status conditions related to the information processing apparatus for identifying the cause apparatus using sufficient conditions, a certainty factor that represents likelihood of the cause information, and one or more detected statuses that satisfy either all or a portion of the one or more status conditions, and which is created on the basis of the analysis rule information, wherein the processor selects a plurality of aggregation-targeted analysis result information from a plurality of the analysis result information based on either the cause information, the one or more status conditions, or the one or more detected statuses included in the analysis result information, wherein the processor creates post aggregation cause information based on the cause information included in the aggregation-targeted plurality of analysis result information, wherein the processor computes a post-aggregation certainty factor based on the certainty factor included in the aggregation-targeted plurality of analysis result information, and wherein the display device displays the post aggregation cause information and the post-aggregation certainty factor.