The crossover algorithm for the interior point LP solver was added in SAS/OR 9.3 and promoted to production status in SAS/OR 13.1. This algorithm converts a solution that is found by the interior point solver to an optimal basic solution, which is easier to interpret and implement. In SAS/OR 13.2, the crossover algorithm is used by default with the interior point LP solver.
The network solver, introduced in SAS/OR 12.1, provides direct access from PROC OPTMODEL to a set of 11 network diagnostic and optimization algorithms. This feature enables you to embed network analysis and optimization into larger solution processes; it is at production status in SAS/OR 13.2.
The parallel implementation of the MILP solver was introduced in SAS/OR 13.1. It enables optimization to be performed largely in parallel on multiple computational cores on a single machine, and it can significantly reduce solution time. On average, the parallel implementation on four cores is twice as fast as the serial implementation on a single core. This feature is at production status in SAS/OR 13.2.