Answer
The order of the BOM is determined by the CATIA tree. The BOM is built based on the positions and quantities in the CATIA tree, using a top-down approach.
Please note:
- Only CAD Documents identified as 'Master' 'Representation type' are automatically included in the BOM. See the full FAQ to understand how to manually add documents of alternative 'representation types'.
- The first instance of a reference found in the tree structure is what determines its position in the BOM.
There are manual ways to override the CATIA positions & quantities, for further information on this see the FAQ below. However, you can also simply reorder the CATIA tree to order parts in the BOM as you desire. Use the 'Graph tree Reordering' function in CATIA to easily move the parts around.
The third button in the window can be used to move the part quickly next to any other, by selecting one in the list. Note when moving a part down from its current position, it will be placed under the document you select. When moving up, it will be placed above.