As usual in a Concert Technology application, an environment, an instance of IloEnv, is created first to organize the data and build the model of the problem.

The data defining this problem includes the width of a roll of stock.This value is read from a file and represented by a numeric value, rollWidth. The widths of the ordered rolls are also read from a file and put into an array of numeric values, size. Finally, the number of rolls ordered of each width is read from a file and put into an array of numeric values, amount.