ABSTRACTThis paper addresses the issue of uncertainty in planning the long‐term development of facility systems. In certain instances, the high variance of a single future forecast can be reduced by using a set of alternative future scenarios. By carefully selecting facility configurations, the planner can delay the selection of a future set of facility sites at little or no sacrifice while additional information is gathered and uncertainty reduced. This allows the planner to maintain flexibility in adapting to a complex and dynamic environment.Several models are presented for different planning contexts. Examples for each, as well as a robust bicriterion solution heuristic, are also provide