from my list of measurements, you can check which ones have solder issues (uneven measurements when same conductor material, are bold emphasized):
(125) 7n occ 4c (copper,furt,MV).....................................57/57/
bad/55..59/59/
bad/57..53/53/54/54..64/62/62/71..[36]
....................only one 1 from 4 had broken solders. isolated qc issue
(131) 7n occ spc 8c (brown,oyde,M)................................107..114..106..125..[31.4]
defective (see spoiler)
...................although not uneven measurements, one positive signal was touching some ground signal: sound was very weird affected. now i check this in every cable i measure (cross measuring, not showed results unless issues)
(065) jcally 5n tpc 4c (dark blue,cheap furt,MV)...............84..
184..80..107..[34.4] (some strands in a core not well soldered or broken)
(066) jcally 5n tpc 8c (black,cheap furt,MV).....................
249..130..126..126..[29.2] (one core not soldered)
..................the only jcally i found without solder issues were copper color ones. coincidence? i'd need more colored or black cables to confirm this. as i mentioned largely, these cables share same cheap furutech styled jacks than TRN 8 cores cables. jack and solder are their weakest points.
(120) bgvp 6n occ+spc? 8c (grey) =DM6 stock...............169..173..
277..190
(060) hck ct3 ofc 8c (brown,furt,M)..................................206/210..206/204..200/205..
486/195..[19]
.................1 of the 2 cables i measured had 1 right ground core (from 2) unsoldered. isolated qc issue? i'd need to measure some more to confirm it.
@Slater has dissected one of these and it's ok. so only 1 of 3 issues till now
(062) hck ct2 ofc 16c (brown,furt,M)................................
402..259..239..244..[22.5]
.................copper version had 1 left core (from 4) unsoldered. spc version was ok. so i'd need to measure some more units to get statistics and confirm it is an isolated qc issue
(056) trn spc 6n occ 8c (silver+black,cheapBal furt,M)....
423/
414..219/216..289/244..
150/223
(056) trn spc 6n occ 8c (yellow+silver,cheapBal furt,M)...
429..289..265..
137
(056) trn spc 6n occ 8c (yellow+silver,cheap furt,M)........
454..219..
135..267
................cores unsoldered, strands broken or unsoldered, etc.
(050) tpc 8c (gold,oyde,M)...............................................346..
636..374..443
it seems that they check that the cable "works" in most cases. but qc doesn't include resistance measurements to check solders..