Node A6 · Acronym decoder
SIT
System Integration Testing
What it actually means
The test phase verifying that assembled components work together — interfaces exchange what the ICDs promised, end-to-end threads execute, emergent behavior is what the architecture predicted. It's distinct from unit-level verification below it and system qualification above it, and it's where under-specified interfaces send their invoices.
Where you'll meet it
Test planning between component delivery and system-level qualification.