On the other hand, when uncertainty comes into play, the
waste flow allocation problem becomes much more complicated.
However, despite its importance and practical relevance, still very
few papers deal with it. Aspects which can be treated as uncertain
are: the processing cost of waste processed at the different
facilities, the cost of transporting waste among the facilities, the
waste generation at each district, the fraction of waste generated
at each district which is recyclable. As pointed out in Section 2,
typical solution approaches make use of stochastic programming
based algorithm