Abstract: A computer-implemented method for an interoperable hierarchical model for conducting multiuser CAx OPERATIONS may include (1) storing a model of an engineering object in a plurality of data nodes that are interconnected with a plurality of dependency references that specify one or more parent nodes for each non-root node of the plurality of data nodes, the plurality of data nodes and the plurality of dependency references corresponding to a directed acyclic graph, (2) indicating an operational order for each data node that has a common parent, and (3) executing in the indicated operational order a CAx-related function for each data node. Various other methods and systems are also disclosed.