Functional failure that requires the manufacturer or highly trained personnel to repair.
What is non user serviceable failure?
The term Non User Serviceable Failure refers to a failure that cannot be repaired or serviced by ordinary users or election workers and therefore requires authorized technical maintenance, replacement, or vendor support. It gives election, security, legal, or technical readers a specific label for the concept rather than a broader everyday meaning.
How does non user serviceable failure work in a voting system?
In practice, Non User Serviceable Failure is applied to the technical or security purpose captured by its definition: a failure that cannot be repaired or serviced by ordinary users or election workers and therefore requires authorized technical maintenance, replacement, or vendor support. Organizations combine that function with documented procedures, authorized access, testing, monitoring, and controls appropriate to the system.
Why does non user serviceable failure matter for election verification?
Understanding Non User Serviceable Failure matters because the concept can affect security, reliability, auditability, or trusted operation. In this glossary context, it refers to a failure that cannot be repaired or serviced by ordinary users or election workers and therefore requires authorized technical maintenance, replacement, or vendor support.
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Functional failure that requires the manufacturer or highly trained personnel to repair.
Cite this term
Election Security Glossary. (2026). Non User Serviceable Failure. In Election Security Glossary. Retrieved August 21, 2026, from https://electionsecurityglossary.com/glossary/non-user-serviceable-failure
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