1. A method, comprising: calculating, in parallel, a plurality of subset outcome values for a plurality of subsets of data attributes, respectively, of a plurality of data attributes, wherein each subset of data attributes comprises a combination of at least one data attribute of the plurality of data attributes, each subset outcome value representing an average of an outcome for members that are associated with the data attributes of each subset of data attributes, wherein each of the plurality of data attributes are associated with a plurality of members; comparing, for each subset of data attributes, a number of members associated with the subset of data attributes with a size threshold; removing each subset of data attributes for which the number of members associated with the subset is below the size threshold; comparing, for each subset of data attributes, the subset outcome value for the subset with the global outcome value; and generating a report that identifies each subset of data attributes for which the corresponding subset outcome value is greater by a first threshold than or less by a second threshold than the global outcome value.