Regularly checking the oven to detect "drift" in heating elements, blower motors, or conveyor speed.
Central to the standard is the , also known as a Verification Test Vehicle. This is a standardized, reusable board with fixed thermocouple locations used specifically for oven verification. By using the same physical board for every check, manufacturers eliminate product variation, ensuring any recorded changes are purely due to the oven's performance. Statistical Process Control (SPC) Ipc-7801 Pdf
Visual inspection (governed by IPC-A-610) is subjective and only catches visible defects. IPC-7801 introduces physics-of-failure approaches. It allows manufacturers to use mathematical models and accelerated testing to "see" failures that would take years to appear under normal operating conditions. Regularly checking the oven to detect "drift" in