Abstract: A real-time collaborative design platform provides a hierarchical 3D model space as a plurality of nodes and branches. Each node may include at least one version of a sub-component and each version may include one or more attributes. The platform facilitates selecting a hierarchical tree from the 3D model space based, at least in part, upon at least one of the one or more attributes associated with sub-components. The platform also facilitates making the 3D model space accessible by multiple users over a network, such as the Internet. Also, each version of a sub-component is accessible in a library associated with the 3D model space.