# Conceptual Product Structure

## How to Show Order BOM by Parallel Structure

| ### What to do:
| Select Start > Products > Configure Products. The Order mask is opened.
| Search for 123 Pen Order.
| Select the Parallel Structures tab.
| The created parallel structure is already added to the Order BOM.
| Select Maintenance.
| Select Order BOM by Parallel Structure from the context menu. The Order BOM by Parallel Structure mask is opened.
| If the Order BOM by Parallel Structure has been modified (e.g. a parallel structure noder or a module has been deleted), the trash has to be emptied first before the Order BOM by Parallel Structure view can be updated.