11. The method according to claim 1 , wherein the first not fully specified data record does not include a second numeric data value for a second variable of the plurality of variables and does include a third numeric data value for a third variable of the plurality of variables, and wherein the obtaining comprises obtaining, using the mathematical model and at least one optimization technique, the first numeric data value and the second numeric data value based on the third numeric data value.
11. The method according to claim 1 , wherein the first not fully specified data record does not include a second numeric data value for a second variable of the plurality of variables and does include a third numeric data value for a third variable of the plurality of variables, and wherein the obtaining comprises obtaining, using the mathematical model and at least one optimization technique, the first numeric data value and the second numeric data value based on the third numeric data value. 26. The method according to claim 11 , wherein obtaining the first and second numeric data values is performed at least in part by using the mathematical model to compute an estimate of the third numeric data value based, at least in part, on the first and second numeric data values and comparing the estimate of the third numeric data value to the third numeric data value.