US 'Cash for Clunkers' CARS.gov website overload
The US government's popular 'Cash for Clunkers' car-trade-in rebate program's website and processing system was overwhelmed within days, leaving car dealers unable to submit rebate applications and get paid.
The damage was public. The root cause was preventable.
The US government's popular 'Cash for Clunkers' car-trade-in rebate program's website and processing system was overwhelmed within days, leaving car dealers unable to submit rebate applications and get paid.
What the software actually got wrong
The CARS.gov application system had not been built or tested to handle the volume of simultaneous dealer submissions the popular program generated, causing the site to crash repeatedly and creating a backlog of unprocessed rebate applications that took the government weeks to work through.
The CARS.gov application system had not been built or...
The CARS.gov application system had not been built or tested to handle the volume of simultaneous dealer submissions the popular program generated, causing the site to crash repeatedly and creating a backlog of unprocessed rebate applications that took the government weeks to work through.
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.
Schedule a demonstration, or explore how Requs AI Edge Case and Software FMEA use the Common Defect Enumeration.