OR seems to be the choice.

thanks for all the advice.

p D "paula" <icj808@uswest.net> wrote in message news:FeJW4.5961$QB4.434772@news.uswest.net... > SAS salespeople said they can give me a good price if I buy IML on top of > SAS STAS. > > Well, my impression is IML specializes in matrix operations. In this > context, it also is capable of doing mathematical programming. But SAS/OR > claims to be management science tools, which also focus on linear > programming, Non linear programming, among others. If I do decision tree, I > should have OR. But I am not sure. Can anyone have any insights into the > differentials between the two? The issue really is if IML is capable of > mathematical programming and I can get it to do most of the work I expect OR > to do, I am relunctant to pay extras for OR. I would pocket IML at a much > better price. > > Thanks in advance. > > Paula D > >