Case Number vs SSCC: Choosing The Right Identifier For Cases

Case Number An identifier printed or encoded on shipping packaging for the supply-chain purpose described by 'Case Number'. When operations consider identifiers they frequently compare a locally defined case number to the GS1 Serial Shipping Container Code (SSCC); both can appear on the same label but have different governance and interoperability implications.

A locally issued case number is often short, human-friendly and designed around internal workflows. An SSCC is a globally unique logistics unit identifier encoded to GS1 rules and intended for cross-enterprise exchange. Choosing between them depends on whether identifiers must be unique beyond a single site and whether trading partners require a standard format.

Key Differences

• Scope: Local case numbers are site-specific; SSCCs are designed to be globally unique across organizations.
• Standards: Local codes follow internal formats; SSCC follows GS1 structure and is commonly encoded in GS1-128 barcodes.
• Interoperability: SSCCs are broadly accepted by carriers and retailers; local numbers require mapping when exchanged externally.

When To Use A Local Case Number

Local case numbers fit operations that are single-site, do not exchange case-level identifiers with partners, or require short codes for manual workflows. Examples include internal kitting, returns handling within a single DC, or short-term staging before bulk consolidation.

When To Use An SSCC

Choose SSCC when cases move between partners, cross-dock flows need single-scan confirmations, or large retailers require ASN-level case identification. SSCCs simplify electronic data interchange, reduce mapping work and are preferred for long-haul, multi-carrier shipping and international logistics.

Hybrid Approach (Recommended For Many 3PLs)

Many warehouses use a hybrid approach: generate an SSCC for external use and keep a short local case number for internal screens or operator convenience. The label then contains both identifiers—SSCC encoded in GS1-128 and the local code printed human-readable under a smaller barcode or as plain text.

Implementation Considerations

• Number Management: Centralize generation (sequence ranges, prefixes) to prevent duplicates, especially when multiple packing lines exist.
• Labeling Standards: Follow GS1 rules for SSCC encoding and GS1-128 application to meet retailer and carrier requirements.
• System Mapping: Maintain a lookup table so a scanned SSCC resolves to the local case number and related order/ASN records in the WMS.

Practical Decision Matrix

If your cases rarely leave your four walls, start with a simple local case number. If you ship to multiple retailers, carriers, or cross-border lanes, invest in SSCC to avoid rework and meet trading-partner mandates. If both apply, print both on the same label and ensure system translation between the two.

In short, the Case Number can be a local tag or part of a standardized identifier like the SSCC. Choose based on interoperability needs, partner requirements and the operational complexity of your distribution network.