Manufacturing Quality Intelligence

13 cell lotsManufacturing & supply chain

Cell-to-pack quality drift & root cause

Drifting lots

of 13 · Cpk<1.33 or >350ppm

Avg process Cpk

1.39

capability index

Avg incoming defect

397

ppm

Packs traced

cell → pack → vehicle

Factory → field root cause

Field fade of packs from low-Cpk lots

0.39%/mo

… from in-spec lots (Cpk ≥ 1.33)

0.27%/mo

1.47×

faster field degradation

Root-cause signal concentrates on Yangtze Power Cells — 3 lots, 0.29%/mo field fade. Trace links every affected pack back to this supplier line.

Cell-lot quality · worst first

Lot	Cpk	Defect	Packs	Field fade	Quality
LOT-LFP-004 Yangtze Power Cells	1.12	869	3	0.26%/mo	29
LOT-LFP-003 Yangtze Power Cells	1.21	1222	3	0.21%/mo	34
LOT-LFP-005 Yangtze Power Cells	1.05	489	3	0.39%/mo	34
LOT-NCA-003 Pacific NCA	1.19	1050	1	0.59%/mo	36
LOT-NMC-005 Nihon Cells	1.14	422	2	0.5%/mo	40
LOT-NMC-004 Nihon Cells	1.38	64	2	0.41%/mo	67
LOT-NMC-003 Rhine Cells	1.44	184	2	0.25%/mo	69
LOT-LFP-002 Volta LFP	1.44	243	3	0.22%/mo	69
LOT-NCA-002 Pacific NCA	1.45	149	—	—	69
LOT-LFP-001 Volta LFP	1.59	105	1	0.14%/mo	79
LOT-NMC-002 Nihon Cells	1.64	179	2	0.36%/mo	80
LOT-NCA-001 Pacific NCA	1.66	53	—	—	81
LOT-NMC-001 Rhine Cells	1.74	129	2	0.21%/mo	85

Quality briefing

Idle.