1. A computer-implemented method comprising: receiving a first 3D model and a second 3D model, said first 3D model representing a first set of objects and said second 3D model representing a second set of objects; scanning each of said first 3D model and said second 3D model to identify said first set of objects and said second set of objects, said first set of objects and said second set of objects having at least a first common object; comparing said first set of objects to said second set of objects to yield one or more differences; and sorting each of said one or more differences based on a set of rules to yield a list of differences, wherein: said set of rules includes a first rule to sort each of said one or more differences based on a relevance score, said relevance score being calculated by multiplying a measurement of change between an attribute of said first common object by a weighted value of said attribute.