Code Design for Business Systems — Deciding Product and Customer Codes, and Check Digits (archived 2026-08-30)
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Abstract
A practical guide to deciding the code scheme for a business system, including product and customer codes. Covers a decision table for meaningful codes versus meaningless serial numbers, check digit formulas such as JAN and Luhn with C# implementations, avoiding Excel's dropped leading zeros, and digit exhaustion and migration. Archived version of https://comcomponent.com/en/blog/business-code-design-check-digit/, as published on 2026-08-30. The live article is maintained and may change after this date. First published 2026-07-18.
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View paper (DOI)Open access versionOpenAlexZenodo (CERN European Organization for Nuclear Research)Published 2026-08-30
Authors: Go Komura
Institutions: Fujikura (United States)