Assemble Systems provides an easy to use mechanism to compare two versions of a Revit model for differences between the two. Assemble will then graphical represent those difference in a color coded 3D view and a model inventory view (Figure 1). This model inventory view gives you an excel spreadsheet like structure that allows you to filter, group and sort data in the model comparisons.
 |
| Figure 1 - Visual Variance View |
Assemble's compare functionality is available when two or more versions of the model have been published to Assemble. When Assemble performs the comparisons, the latest version of the model that has been published to Assemble is considered the primary model. The previous version is considered the secondary model. Assemble then compare the model elements of the primary model to the secondary model.
When there is a model change between, Assemble looks at the quantity for the element in the source model and the quantity for the element in the secondary model and presents the variance in the model (Figure 2). The 3D model (Figure 1) uses a color coded Legend (Figure 3) to mark model elements that have changed.
 |
| Figure 2 - Compare Function |
 |
| Figure 3 - Variance Legend |
Assemble does this comparison by comparing the Revit element IDs between
two versions of the model. It will then report in a spreadsheet like
view and graphical view items that have been Added, Removed, Type
change, Quantity change and Type and Quantity change. Other systems like
Revit, Navisworks, Tekla BIMSight can perform similar functions, but
Assemble does it very quickly and the user does not need to be a BIM
Authoring application user.
