MSC Apex Structures is an add-on product to MSC Apex Modeler that enables linear structural analysis capabilities. It includes a user interface for defining analysis scenarios and post-processing results, as well as integrated solver methods. The product allows for interactive and incremental validation and analysis of finite element models. Computational parts technology enables efficient analysis by storing and reusing part behavior representations, rather than recomputing for every analysis. This enables fast incremental solving when parts are modified.