Originally posted by: USMC

I can't find any way to create special ordered sets (SOS) using OPL.  Is this feature not supported?

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: fbahr

Technote (FAQ): oplstudio/FAQ/139 - http://www-01.ibm.com/support/docview.wss?uid=swg21401452

 

Question

Are Special Ordered Sets (SOS) available with OPL?

Answer

The OPL language does not support SOS...

#DecisionOptimization
#OPLusingCPLEXOptimizer

Originally posted by: USMC

I appreciate you confirming that for me.

 

thanx,

 

#DecisionOptimization
#OPLusingCPLEXOptimizer

Indeed , no direct support for SOS1 in OPL but we can use logical constraints. For instance:

int nbKids=300;
float costBus40=500;
float costBus30=400;
 
dvar int+ nbBus40;
dvar int+ nbBus30;
 
minimize
 costBus40*nbBus40  +nbBus30*costBus30;
 
subject to
{
 40*nbBus40+nbBus30*30>=nbKids;
 
 // SOS1
 (nbBus40>=1)+(nbBus30>=1)<=1;
} ​

------------------------------
[Alex] [Fleischer]
[Data and AI Technical Sales]
[IBM]
------------------------------

Original Message:
Sent: Tue September 20, 2022 03:49 AM
From: Archive User
Subject: Re: SOS in OPL?

Originally posted by: USMC

I appreciate you confirming that for me.

 

thanx,

 

#DecisionOptimization