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Glossary · UNECE / Type Approval
Software Update Management System (SUMS)
Also known as: Software Update Management System
Process system covering planning, distribution, and recording of vehicle software updates.
A SUMS is the organisational counterpart to the CSMS for software updates. It governs how updates are planned, signed, distributed, applied, and recorded — including rollback and update-identification practices. UNECE R156 requires a certified SUMS for type approval in adopting markets.
Related terms
UNECE R156
UN Regulation requiring a certified Software Update Management System for type-approved vehicles.
OTA Update
Over-the-air software update delivered to a vehicle ECU after manufacture.
RXSWIN
Regulation X Software Identification Number — identifier for the software set covered by a UN regulation type approval.
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