1. A computing device, comprising: a storage device; a processor; the storage device having instructions that when executed by the processor, cause the computing device to: identify a subset of tuples in building a combinatorial test model as supervised tuples that are to be confirmed using expert data, wherein the subset of tuples comprises tuples of attributes of the combinatorial test model, tuples of attribute values of the combinatorial test model, or any combination thereof, and wherein each of the attributes corresponds to a parameter, or a variable of a computer program, wherein the parameter or the variable indicates a billing type corresponding to a caller or a phone card, and wherein at least one of the tuples of attribute values corresponds to a restriction on a value combination, wherein the value combination comprises: a phone call type comprising a local phone call, a long distance phone call, or an international phone call; the billing type; an access type comprising VOIP or PBX; and a server billing type; confirm at least some of the supervised tuples using the expert data; determine a metric indicating progress of the building of the combinatorial test model based on the confirmed tuples; and manage a combinatorial modeling project based on the metric.