Data quality

Measured 2026-10-26. Whole TAS database: quality 64.4 %, coverage 29.4 %. These are the numbers the quality run produced, unrounded by hand and not curated.

Family	Live parts	Quarantined	Quality	Coverage	Part exists	Fields traced to a source	Core fields present	Datasheet curves present	Source URL alive	Schema-valid, physics-plausible
mosfet	11,236	3,665	39.2 %	8.4 %	93.6 %	25.2 %	51.0 %	0.0 %	93.4 %	95.5 %
diode	38,109	2,933	59.4 %	6.2 %	79.6 %	46.4 %	62.2 %	0.0 %	76.2 %	99.5 %
capacitor	431,873	7,944	70.1 %	46.6 %	94.3 %	74.8 %	75.7 %	15.5 %	72.8 %	100.0 %
resistor	443,754	2,060	72.4 %	65.2 %	96.2 %	56.3 %	70.9 %	62.4 %	71.9 %	100.0 %
controller	5,937	355	64.6 %	3.2 %	76.2 %	66.2 %	47.2 %	n/a	94.1 %	90.3 %
igbt	1,978	779	29.5 %	50.5 %	66.4 %	21.1 %	36.7 %	0.3 %	66.3 %	100.0 %
bjt	5,177	166	58.9 %	10.0 %	93.6 %	23.9 %	54.9 %	n/a	83.8 %	95.5 %
varistor	4,232	3,364	27.9 %	51.3 %	74.2 %	25.9 %	62.4 %	0.0 %	68.3 %	99.9 %
magnetic	94,271	1,291	54.3 %	37.1 %	71.9 %	33.2 %	69.9 %	9.9 %	69.9 %	96.4 %
analog	4,942	15	69.7 %	5.9 %	95.0 %	26.9 %	73.8 %	n/a	99.8 %	99.8 %
timing	22,418	25	57.6 %	10.5 %	55.6 %	33.2 %	70.3 %	n/a	48.3 %	99.6 %
connector	416,126	42,219	55.9 %	27.6 %	98.5 %	66.5 %	57.3 %	0.6 %	62.8 %	94.6 %

What the numbers mean

Quality is a weighted checklist per part (the existence of the part, fields traced to the source they were read from, core fields present, datasheet curves present, a live source URL, schema validity and physics plausibility). It is a completeness and evidence score, not an accuracy rate: a part can score low because its record is sparse and still be correct.
Quarantined rows are held out of the live catalogue pending review and count as zero in the family's quality.
Coverage is live parts divided by the estimated number of in-scope parts in the datasheet archive the catalogue is measured against.
“Fields traced to a source” is the honest provenance number: how much of each record is covered by a source it was actually read from, rather than a URL it merely cites.

Controls

A fabricated-parts check runs before every shard build and every data deploy; a failure blocks the build.
The Blade Runner physics validator flags impossible and suspicious values; flagged parts lose quality and show as findings.
Every part page links to a public issue form for reporting a wrong value; reports are mirrored into the fix loop.

JSON: /api/v1/quality · Kelvin