1. A non-transitory computer system including a non-transitory computer-readable medium for modeling supply chain networks, the non-transitory system comprising: a model manager configured to initialize a model, the model comprising a set of mathematical or logical relationships describing a behavior of a supply chain network; a node identification manager configured to initialize a number of nodes within the model, wherein each of the number of nodes is a corresponding description within the model of a corresponding unique physical location where corresponding inventory assets, comprising services or physical objects, are created stored, sold, and replenished, and wherein the number of nodes comprises at least two nodes; a pipeline manager configured to generate a number of pipeline data objects, wherein each pipeline data object corresponds to and is associated with a corresponding node, wherein each pipeline data object is one of: a corresponding defined procurement relationship between the corresponding node and at least one other node in the model, or a corresponding strategy for replenishment of supplies for the corresponding node, wherein each pipeline data object is a data record in an expandable table of records, and wherein each data record is a table describing each corresponding defined procurement relationship or corresponding strategy for the corresponding node; a requisitions manager configured to generate and receive requests for supplies from among any of the corresponding inventory assets; and a supply control manager configured to send and receive the inventory assets according to requests for supplies, wherein the supply control manager is further configured to use ones of the number of pipeline data objects in determining sending and receiving of the inventory assets.