In Microsoft Dynamics AX 4.0, BOM and route version selection are controlled by both quantity and date. Having an expiry date on a BOM will help to reduce the amount of excess and obsolete materials by ensuring that the specified part is used before an alternate part. The system automatically selects the right BOM and route based on the order size.

Microsoft Dynamics AX 4.0 provides enhanced functionality for BOM costing. The calculation is performed in one step that runs through the BOM from top to bottom, taking into account the actual quantities on higher-level BOMs and applying these to the required sub-BOM quantities. This ensures that correct item quantities and accurate prices are calculated during posting.

In Microsoft Dynamics AX 4.0, the flushing principle, which enables automatic consumption, is set to start by default. The option of registering item consumption when you update a production order to both the start and finish phases has been removed.