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by altshiftprtscrn 3475 days ago
This is pretty spot on. We know why the defects happen and why they cause downstream test failures, but we lack the ability to prevent (all of) them.

To clarify on that 95% value because it is admittedly really vague: That's actually a 95% correct prediction rate. So far we get ~2.5% false-positives and ~2.5% false-negatives. 2.5% of the parts evaluated will be incorrectly allowed to continue and will subsequently fail downstream testing (no big deal). More importantly, 2.5% of parts evaluated will be wrongly identified as scrap by the model and tossed, but this still works out to be a massive cost savings because a lot of expensive material/labor is committed to the device before the downstream test.
2 comments
andrewchambers 3475 days ago
I hope you get a decent chunk of those cost savings as a reward for your effort, great job.
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mattmanser 3475 days ago
D'Angelo Barksdale: Nigga, please. The man who invented them things? Just some sad-ass down at the basement at McDonald's, thinkin' up some shit to make some money for the real players.

Malik 'Poot' Carr: Naw, man, that ain't right.

D'Angelo Barksdale: Fuck "right." It ain't about right, it's about money. Now you think Ronald McDonald gonna go down in that basement and say, "Hey, Mista Nugget, you the bomb. We sellin' chicken faster than you can tear the bone out. So I'm gonna write my clowny-ass name on this fat-ass check for you"?

Wallace: Shit.

D'Angelo Barksdale: Man, the nigga who invented them things still workin' in the basement for regular wage, thinkin' up some shit to make the fries taste better or some shit like that. Believe.

[pause]

Wallace: Still had the idea, though.

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agopaul 3475 days ago
Can't believe I'm seeing the Wire referenced on HN
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slmyers 3475 days ago
Oh, a Wire reference on HN... my life is one step closer to completion.
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taejo 3475 days ago
> 2.5% of parts evaluated will be wrongly identified as scrap by the model and tossed

2.5% of what, though? if only 1 in a million parts are actually bad, you're still tossing many more good parts than bad parts.

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altshiftprtscrn 3474 days ago
Correct - as mentioned the cost savings still work out. The defect rate is around 30% (Nowhere close to 1 in a million).
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