Manufacturing, DFM & DFT — question 8 of 10
Write a real answer. It is graded against the question's rubric, and the mastery movement is computed by the same engine the product uses. Scoring here is deterministic rather than model-written, so this page costs nothing to run and nothing is saved. In a track built from your own posting, the same rubric is graded by the model, which is what produces feedback about your reasoning rather than about coverage.
A product line has been running steadily at 95% first-pass yield for the past three months. Over the last two weeks, yield has slid down to about 70%, and nearly every failing board fails the same in-circuit test step on one particular component footprint. Walk me through how you'd figure out whether this is a design flaw that's been latent all along, or a process change that just started, and what data you'd pull first.