A ServiceNow software model is designed to have a one-to-one relationship with a service catalog item. This is implemented through the "Product catalog item" field on the Software Model [cmdbsoftwareproductmodel] form, which is a reference field pointing to the Service Catalog Item [sccatitem] table. A reference field can only store a single value (sysid), thereby limiting the association to exactly one catalog item. This design ensures a clear and direct path for software requests, which is essential for automating the procurement and license allocation processes within the Software Asset Management application.

B, C, D, E: These options are incorrect because the underlying data structure of the software model record only allows for a single reference to a catalog item, not multiple. There is no related list or other mechanism to associate a software model with more than one catalog item.

1. ServiceNow Product Documentation: "Create a software model". In the procedure for creating a software model

step 10 explicitly states: "In the Product catalog item field

select the catalog item that you want to associate with the software model." The use of the singular "the catalog item" confirms a single association. (ServiceNow Vancouver release documentation).

2. ServiceNow Product Documentation: "Software model fields". The documentation describes the "Product catalog item" field as the "Catalog item that is associated with the software model

" again implying a singular relationship. (ServiceNow Vancouver release documentation).

3. ServiceNow Now Learning: Software Asset Management (SAM) Professional Fundamentals. The "Software Models" module explains that linking a software model to a product catalog item enables users to request the software. The training material and labs consistently demonstrate populating this single reference field

reinforcing the one-to-one design.