What is Serial Number Tracking?
Assigning a unique identifier to each individual unit so it can be traced through production, sale, warranty, and service.
Definition
Serial number tracking is the practice of assigning a unique identifier to every individual unit of a product so that single item can be traced through production, sale, warranty, and service. It differs from the two identifiers it is most often confused with. A SKU identifies a product type, so every unit of the same model shares it. A lot or batch number identifies a group of units made together from the same materials on the same run. A serial number identifies exactly one physical unit, and no two units ever share it. In practice manufacturers use all three together: the SKU says what the item is, the lot says which run it came from, and the serial says which specific unit it is. Serialization is standard wherever unit-level identity carries legal, financial, or safety weight. Electronics manufacturers serialize devices to validate warranty claims and authenticate returns. Medical device makers serialize implants and instruments to meet FDA UDI rules and trace a device to the patient it was used on. Automotive suppliers serialize safety-critical parts such as airbag modules and brake assemblies, so a defect traced to one production window can be isolated to the exact vehicles affected. Aerospace manufacturers serialize rotable parts and log flight hours and overhaul history against each serial for airworthiness records. Why it matters comes down to three things. Warranty validation: a serial proves whether a unit is genuinely in coverage and blocks claims on expired or non-genuine goods. Recall precision: item-level traceability narrows a recall from an entire lot to the handful of units actually affected, cutting both cost and reputational damage. Counterfeiting and gray-market control: unique, registered serials let a manufacturer verify authenticity and detect product diverted outside authorized distribution channels.
How Serial Number Tracking Works in ERP
A serial-enabled ERP captures serial numbers at the point a unit comes into existence, then carries that identity through every subsequent transaction. Assignment can be automatic, where the system generates the next serial from a defined mask or number range as a production order is completed or a goods receipt is posted, or manual, where an operator scans a vendor-applied barcode or keys in a serial supplied upstream. Automatic assignment suits in-house manufacture and keeps numbering consistent; manual capture is used for purchased serialized components whose identifiers originate with the supplier. From there the ERP records every movement, transfer, shipment, return, and service event against the serial, linking it to the work order, the BOM revision built, the component lots and serials consumed, and the warranty terms sold. During a recall the system queries that genealogy in both directions: forward from a suspect component lot to every finished serial that consumed it and the customers who received them, and backward from a failed unit to the exact materials, revision, and operations behind it.
ERP Vendors with Strong Serial Number Tracking
Epicor Kinetic
ERP built for manufacturers — from job shop to enterprise
Rootstock Cloud ERP
Cloud ERP built on the Salesforce platform for manufacturers and distributors
Genius ERP
Purpose-built ERP for engineer-to-order and custom manufacturers
Global Shop Solutions
All-in-one ERP for small to midsize manufacturers
Frequently Asked Questions
What is the difference between serial and lot tracking?
Serial tracking assigns a unique identifier to each individual unit, allowing one specific item to be traced through its entire life. Lot tracking groups many units produced together under a single lot or batch number. Serialization is used for high-value, serviceable, or regulated items needing per-unit history, while lot tracking suits bulk or homogeneous goods where individual identity is unnecessary.
What is an as-built configuration?
An as-built configuration is the record of exactly which components, lots, serial numbers, and design revisions went into a specific serialized unit when it was manufactured. It lets service and quality teams know the precise makeup of any individual unit years later, even after design changes. This is invaluable for warranty, field service, recalls, and engineering change traceability.
How does serial number tracking work in an ERP system?
The ERP assigns or captures a serial at production completion or goods receipt, then stamps that serial onto every later transaction: putaway, transfer, shipment, return, and repair. Each serial is linked to the work order, the BOM revision, the component lots and serials consumed, and the warranty terms sold. Staff scan serials with barcode or RFID devices at each step, and can query any single serial to see its full genealogy, ownership, and location history without leaving the system.
What industries require serial number tracking?
Medical devices under FDA UDI, aerospace and defense, automotive safety components, electronics and IT hardware, firearms, and pharmaceutical packaging under DSCSA all mandate unit-level identification. Beyond regulation, makers of capital equipment, industrial machinery, and high-value consumer goods serialize voluntarily to control warranty exposure, support field service and spare parts, and prove authenticity in resale and gray markets.
How is serial number tracking different from SKU tracking?
A SKU identifies a product type, so every unit of the same model, color, and size shares one SKU. SKU-level data answers how many you have, not which ones. A serial number identifies one physical unit and never repeats, so it answers where that specific item is, who bought it, what went into it, and whether it is still under warranty. Most ERP systems carry both: SKU for planning, pricing, and costing, and serial for traceability, warranty, and service.