the process begins with a designer creating a basic design of an object using cad software with parametric or algorithmic relationships. these relationships are then linked to physical sensors, allowing them to drive changes to the cad model within the established parameters. reasons to allow sensors to modify a cad model include customizing a design to fit a user's anthropometry, assisting people without cad skills to personalize a design, or automating part of an iterative design process in similar fashion to generative design. once the sensors have affected the design it may then be manufactured as a one-off piece using a digital fabrication technology, or go through further development by a designer.