Network models provide a general representation of inter-connected system dynamics. This ability to connect systems has led to a proliferation of network models for economic productivity analysis. primarily estimated non-parametrically using Data Envelopment Analysis (DEA). While network DEA models can be used to measure system performance. https://www.roneverhart.com/Ferrofish-A32pro-32-Channel-AD-DA-Converter-with-MADI-and-ADAT-p18115/