What do you mean by a 'sustainable supplier'? One that will keep on supplying for a very long period of time? One that focuses on sustainability practice? Or what? They aren't the same because a very sustainability focussed business can go bust financially and that would in common terms mean it wasn't very sustainable. Comes back to the definition of 'sustainable'. But I've said that many times before . . .
The optimal multiple objective selection of the best suppliers has to do with the optimal selection of the equipment according to the available resources and to the market offers. If the problem is, by example, in the supply of the energy equipment to satisfy the necessities of a territory, or to maximize the produced energy, considering investment and operation costs and gases pollution, then a multiple objective problem arises with clear restrictions and objectives. I am devote right now to the solution of this kind of problems. The central point consists in the solutions conciliation of the parts of the system.
The optimal multiple objective selection of the best suppliers has to do with the optimal selection of the equipment according to the available resources and to the market offers. If the problem is, by example, in the supply of the energy equipment to satisfy the necessities of a territory, or to maximize the produced energy, considering investment and operation costs and gases pollution, then a multiple objective problem arises with clear restrictions and objectives. I am devote right now to the solution of this kind of problems. The central point consists in the solutions conciliation of the parts of the system.