I might have a saying in here in order to clarify few issues regarding the "Alternate Items" and "Substitute Items", which are differently handled by the systems Both are used to specify item substitutes, although, the follow are the key differences to consider.
Alternate Items: which can be reached as follows;
You can specify as many substitute items in this window as you want (unlimited number of substitutes). Those substitutes can be categorized as "informational" since they will not be "automatically" used by the system to be alternate original items in any process.
Alternate items are saved in (IVR10100 | Alternate Items) table, (Item Number, Alternate Items).
Substitute Items: which can be reached as follows;
- Item Maintenance > Options > Substitute Item (1 and 2)
Substitute Items entered within these fields, are considered as "Alternative Items" that will be suggested by the system automatically when the original item has zero stock. Associated modules that are included in this process: GP Invoicing, SOP and BOM.
Helping Note:
By default, when entering alternate items on the "Alternate Item Window", the first two only will be considered as substitute items (1 and 2), which will be used automatically by the system as explained above.
On the other hand, when you enter "Substitute Items" directly from Item Maintenance > Options, you will get a warning message that "Manufacturing User should enter this substitute item in the Alternate Item Window", and still the substitute are saved in item master only.