Reconfigurable distributed active transformers are provided. The invention also relates to silica-based sols obtained by the process, as well as a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibres; adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention; and dewatering the obtained suspension to provide a sheet or web of paper. Thus, the method operates through a spectrum of time horizons from the strategic to real time, providing a coherent and cohesive system for matching supply to demand based on the priorities of the business as represented through the set of rules. Further aspects of the disclosure relate to various functions and processes related to accessing routing data andor information from a routing database. The target box is supported by spaced apart uprights.