> "each day the customer order is delayed is bad, but I also can't make things 3 months before they want it This would be something in the objective function,

> "each day the customer order is delayed is bad, but I also can't make things 3 months before they want it This would be something in the objective function, I think? Assign some daily cost to having stock in inventory and a penalty per day that the "supply delivery to customer" task completes after the deadline. IIRC ILOG solver used to have a lot of constraints that made implementing that kind of thing easier.