Abstract: A system for analysis of gaps between modeled parts of an assembly to be produced is provided. The system generates a three-dimensional (3D) visualization environment of 3D models of a plurality of parts in the assembly and performs an analysis of those of the 3D models within a given proximity to each other to determine gaps therebetween, including any non-acceptable gaps with gap distances that exceed an acceptable gap threshold. The system generates, for a non-acceptable gap, an instruction and automatically implements the instruction to correct the non-acceptable gap and confirms that the non-acceptable gap as corrected does not have a gap distance that exceeds the acceptable gap threshold. The system generates an output of a 3D model of the assembly populated with the 3D models and with the non-acceptable gap as corrected for use in connection with production of the assembly.