The substitutes tab for a BOM relationship lists parts that could be used instead of the child part in the making of the parent part. So, for example, if the parent part is an F41 Turbine, and the child part is a 12 Casing Assembly, perhaps a 112 Casing Assembly or a 122 Casing Assembly could be used instead of the 12 Casing Assembly to make the F41 Turbine. However, if the 12 Casing Assembly was also used to make a different turbine, say, F44 Turbine, this substitution would not be allowed there. So, to summarize, the parts listed in the Substitutes table of the BOM relationship define substitutes to be used for the child part in the assembly of its parent part only; this is not a global substitution. To learn how to specify global substitutes, see Alternates.

To add a substitute:

  1. Edit the parent part.

  2. In the BOM tab of the parent, select the child part for which you want to create a substitute.

  3. Right click on the child part, and select View "BOM" from the popup menu.

  4. Select the Substitutes tab.

  5. Notice that the BOM Relationship item is in view mode. To add items, you need to lock it first, by clicking on the lock icon on the main tool bar.

  6. Make sure that Pick Related is selected in the Actions drop-down box.

  7. Click on the New Item icon next to the drop-down box. This will open a new dialog from where you can search and select parts you wish to specify as substitutes.

  8. Save, Unlock, and Close .