Abstract--We consider a set of multicast sources, each multicasting a finite amount of data to its corresponding destinations. The objective is to minimize the time to deliver all traffic, i.e., to obtain schedules of minimum length. We consider timevarying wireless networks with imperfect side information at the sources. We model the minimum-length scheduling problem through partially observable stochastic shortest paths and provide an optimal solution. Due to the high complexity of computing the optimal solution, we finally provide a set of heuristics and illustrate their performance through numerical experiments.