UK GOV.UK Verify digital identity system failure
The UK government's flagship digital identity-verification service, meant to let citizens securely prove their identity online for government services, was shut down in 2020 after years of underperformance, having cost hundreds of millions of pounds.
The damage was public. The root cause was preventable.
The UK government's flagship digital identity-verification service, meant to let citizens securely prove their identity online for government services, was shut down in 2020 after years of underperformance, having cost hundreds of millions of pounds.
What the software actually got wrong
The National Audit Office found the system never achieved anywhere near its target verification success rate, as its identity-matching software struggled to reliably verify a large share of real users against commercial data sources, undermining the whole premise of the service.
The National Audit Office found the system never achieved...
The National Audit Office found the system never achieved anywhere near its target verification success rate, as its identity-matching software struggled to reliably verify a large share of real users against commercial data sources, undermining the whole premise of the service.
Requs AI Edge Case flags this exact pattern at the requirements and architecture stage — before a single line of code implementing it exists — so the assumption behind it gets challenged while it is still cheap to fix.
Beyond code coverage and "shall" testing
Root causes like this one rarely show up in code coverage or requirements-compliance testing, because nobody wrote a requirement anticipating the specific edge case that broke. Requs AI Edge Case and Requs AI Software FMEA are built to surface exactly this class of overlooked failure mode — before the software is written.
Surfaces this before code exists
Identifies edge cases like this one at requirements and architecture time, using the Common Defect Enumeration to catalog failure patterns seen across hundreds of real-world software failures — including this one.
Connects the failure mode to the hazard
Traces this class of root cause directly to the system-level hazard it can produce, so a defect pattern like this one gets flagged during design review instead of after it ships.
Find the overlooked root causes before they ship.
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