Handling Unit (HU)
Also: HU, Handling Units, Ladeeinheit, Versandeinheit, Logistische Einheit
AI-generated
A Handling Unit (HU) is a logistical unit comprising goods and packaging that is moved as a whole during warehousing and transportation processes and managed systemically with a unique ID. Typical HUs include pallets, cartons, or containers.
Key facts
- A Handling Unit combines goods and load carrier into a systemically managed unit with a unique ID.
- HUs can be nested hierarchically — for example, a carton on a pallet inside a container.
- The SSCC number is the identifier of the HU, not the HU itself.
- The HU configuration in the WMS largely determines the efficiency of goods receipt, storage, and shipping.
- Exception processes such as mixed pallets or partial withdrawals require special attention during system design.
What is a Handling Unit?
A Handling Unit (HU) refers to the combination of a load carrier and the goods contained in or placed on it, which is treated as a single unit throughout the logistics process. Each HU is assigned a unique identifier — commonly an SSCC number (Serial Shipping Container Code) or an internally assigned ID — through which its contents, status, location, and destination are tracked at the system level. The HU is therefore not only a physical object, but simultaneously a data object within the WMS or ERP.
An important distinction: the number alone (e.g., NVE or SSCC) is merely the identifier. The HU is the real object identified by that number. Confusion between the number and the object frequently leads to misunderstandings during system configuration in practice.
How does HU management work in practice?
In a warehouse management system, the HU serves as the central movement object. Every warehouse process — goods receipt, putaway, transfer, picking, goods issue — is recorded as a status change or position change on the HU. HUs can also be nested hierarchically: a carton (HU level 1) is placed on a pallet (HU level 2), which in turn is transported inside a container (HU level 3). This nesting makes it possible to move entire load units with a single scan, without having to post each individual item separately.
When repacking occurs — for example, when cartons are re-palletized — a new HU is typically created, while the old one is deactivated or dissolved. The exact behavior depends on the respective WMS vendor and the system configuration.
- Goods receipt: HU is created or adopted from the delivery notice (DESADV).
- Putaway: HU is assigned to a storage location.
- Picking: Contents are removed or the HU is moved as a whole.
- Goods issue: HU is assigned to a delivery order and posted out.
What matters when selecting and configuring HUs?
When designing an HU structure, you should first determine which physical units are to be managed as independent HUs at all. Not every operation requires all hierarchy levels. Too fine a granularity increases the posting effort; too coarse a granularity reduces transparency.
Another key decision is ID assignment: SSCC numbers are standardized and facilitate data exchange with suppliers and customers, but require a GS1 license and corresponding printing processes. Internal number ranges are easier to set up, but only work reliably within your own system.
Finally, it must be clarified how mixed pallets, partial withdrawals, and damaged HUs are handled — these exception processes are more complex in practice than the standard workflow and should be addressed early in the requirements specification.
Related terms
- Artikelstammdaten
Item master data refers to the permanently valid base data of an item – such as dimensions, weight, packaging units, hazardous goods classification, and best-before date relevance. It forms the foundation for all logistical, procurement-related, and system-driven processes along the supply chain.
- Auftragspositionen
Order line items are the individual lines within an order, each describing an article, a quantity, and supplementary delivery conditions. They form the smallest controllable unit in order processing and serve as the basis for picking, procurement, and invoicing.
- Avisierung
Pre-advice refers to the advance notification of a delivery by the supplier to the recipient before the goods arrive. It enables the warehouse to plan staffing, dock capacity, and put-away processes in a timely manner.
- Barcode
A barcode is a machine-readable optical code that represents information as a pattern of bars and spaces or as a two-dimensional matrix. It enables the automatic identification of items, load carriers, and documents along the entire supply chain.
- Bestandsführung
Inventory management refers to the system-supported administration and continuous updating of all warehouse and material stocks within a company. It forms the basis for planning, procurement and accounting – and ensures that the book inventory and physical inventory are in agreement at all times.
- Bewegungsdaten
Movement data captures all transactions and physical goods movements in the logistics process – from goods receipt and stock transfers to dispatch. It contains timestamps, quantities, locations and the units involved, and forms the basis for transparency, control and analysis in warehouse and…
- Chaotische Lagerhaltung
Chaotic storage is a warehousing principle in which items are not stored in fixed, pre-assigned locations, but are instead dynamically placed in any available, suitable slot in the warehouse. A warehouse management system handles the control and tracking of all storage locations.
- Charge
A batch is a uniquely identifiable quantity of products manufactured or processed under identical conditions. It forms the basis for traceability, quality control, and legally required recall processes throughout the entire supply chain.
- Colli
Colli refers to a single package within a shipment – such as a carton, a crate, or a bundle. The number of colli represents the package count in shipping documents and serves as the basis for labeling, loading, and freight billing.
- DESADV
DESADV (Dispatch Advice) is a standardized EDI message in EDIFACT format that electronically announces an upcoming delivery. It transmits structured information on packaging units, items, quantities, and identifiers such as the SSCC to the goods recipient.