Each door lock that Universal Containers (UC) sells has a unique 20 digit code.

For this scenario, Salesforce Field Service should use one Product Item with serialized units in the related list. The locks are serialized inventory because every physical unit has a unique identifier. The Product Item represents the stock at the technician ' s van Location, and the Serialized Products related list stores each individual serial number.

Inventory design should also preserve pricing and traceability. Price Books and Price Book Entries supply commercial pricing, while serialized inventory gives unit-level identity when individual items must be tracked. Product Requests and Product Transfers manage replenishment and movement rather than the underlying job structure.

The alternatives address different parts of the Field Service model. A quantity-only Product Item would lose individual traceability, and serial numbers in Notes are unstructured and cannot participate properly in serialized-inventory transactions.

This approach keeps the implementation aligned with the standard Field Service data model and avoids unnecessary customization. Study Guide reference: Managing Inventory — Serialized Products; Product Items; van stock; serial-number tracking.