Customize the Sublist of Lot Numbered Assembly Item

Scenario

Customize sublist of Lot Numbered Assembly Item and Serialized Assembly Item/s.User may be required to add field(s) on the sublist of the item record. To add field on the sublist, there are two requirements: a Custom Entity field and a Script.A custom record is needed to store the information that is being entered on the vendor sublist of the item record. The script set/sets the value of the custom field from/to the sublist, and create the column on the sublist as well. Create a custom record that will store the values of the custom fields. 

Solution

Create the custom record field:

1. Navigate to Customization > Lists, Records & Fields> Record Types > New 
2. Set Label: (name of custom record)
3. Set Id:
4. Click Save

Create fields in custom record:

1. Click the New Field button to create custom field that will link the custom record and item record
2. Set the following:
       Label: Item
       ID: _item
       Type: List/Record
       List/Record: Item
       Store Value: checked.
3. Click Save
4. Click the New Field button to create custom field that will store the value of the custom field.
5. Set the following:
       Label: (name of the field)
       ID: _custom_field_1
       Type:  Free-Form Text (you can choose any type depending on the requirement)
       Store Value: checked
6. Click Save