SAS/OR 13.1 includes new features and enhancements to current features in optimization, discrete-event simulation, and constraint programming. In addition to ongoing improvements in the performance of the linear, mixed integer, quadratic, and general nonlinear optimization solver algorithms, these changes expand the range of problems you can address, make it easier to use the SAS/OR modeling and solution methods, deepen integration with other SAS analytic capabilities, and more fully utilize your available computational resources.