benikigai/plus-onePublic

Plus One

Prototype in design. Every value is a design target.

Factory · Quality

Quality

How is every unit checked, and against what limits?

5: inspection plans
15: tests
10 of 15: tests with limits

Station	Incoming	In-process	Outgoing	Tests	All
S1 Top shell sub-assembly	1	1			2
S2 Place main board	1				1
S5 Battery	1				1
S7 Flash, provision, calibrate				4	4
S8 Functional test, mark, pack			1	11	12

Inspection plans by stage and tests, counted per station. Darker: more checks.

Inspection plans

Stage	Characteristic	Item	Station	Sampling	AQL	Sample	Method
IQC	Diameter, ring slot width, cosmetic grade A `insp:shell-iqc`	Top shell	Top shell sub-assembly	ANSI/ASQ Z1.4 level II lots 1201 to 3200 proposed plan; set at the pilot build InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`	1	125	caliper, pin gauge, light booth InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed
IQC	EMS test record present; boots and enumerates over USB `insp:pcba-iqc`	Main board (PCBA)	Place main board	ANSI/ASQ Z1.4 level S-3 lots 1201 to 3200 proposed plan; set at the pilot build InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`	0.65	32	sample power-on InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed
IQC	Open-circuit voltage 3.7 to 3.9 V; no swelling `insp:cell-iqc`	Li-ion cell with protection	Battery	ANSI/ASQ Z1.4 level II lots 501 to 1200 proposed plan; set at the pilot build InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`	0.4	80	OCV meter, thickness gauge InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed
IPQC	Stake pull-off force `insp:stake-ipqc`	Light-ring diffuser	Top shell sub-assembly	other proposed plan; set at the pilot build InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`	—	5	push-out test, first five each shift InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed
OQC	Packed unit complete; boots; QR reads `insp:oqc-audit`	Packed unit with cable and card; no back ships	Functional test, mark, pack	ANSI/ASQ Z1.4 level II lots 1201 to 3200 proposed plan; set at the pilot build InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`	0.65	125	audit InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed

Tests

Test	Station	Measures	Lower limit	Upper limit
Firmware image flashed and verified `test:flash-verify`	Flash, provision, calibrate	image hash	none	none
Unit ID provisioned once `test:unit-id`	Flash, provision, calibrate	eFuse read-back	none	none
Mic sensitivity after calibration `test:mic-sensitivity`	Flash, provision, calibrate	dBFS at 94 dB SPL, 1 kHz	-28 dBFS InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit	-24 dBFS InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
Motion sensor bias after calibration `test:imu-bias`	Flash, provision, calibrate	accelerometer bias	none	0.05 g InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
Plus button actuation `test:button`	Functional test, mark, pack	switch closes, debounced	none	none
Touch ring delta `test:touch-ring`	Functional test, mark, pack	touch counts on a reference finger	30% InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit	none
Light ring colours `test:ring-leds`	Functional test, mark, pack	camera colour check per LED	none	none
Haptic drive current `test:haptic`	Functional test, mark, pack	mA at rated drive	40 mA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit	90 mA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
Charge current over USB-C `test:charge`	Functional test, mark, pack	mA from USB at 5 V	100 mA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit	300 mA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
Wireless charging `test:wireless-charge`	Functional test, mark, pack	charge current on a reference magnetic charger	60 mA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit	none
Audio loopback `test:audio-loopback`	Functional test, mark, pack	speaker to mics, level and THD	none	3% InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
Radio check `test:rf-check`	Functional test, mark, pack	Wi-Fi and BLE RSSI against a golden radio in the shield box	-60 dBm InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit	none
Hardware power-off current `test:power-off`	Functional test, mark, pack	cell current with the switch off	none	1 uA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
Pogo pad current limit `test:pogo-limit`	Functional test, mark, pack	short-circuit current at the pads	none	300 mA InferredEngineering judgement, not measured. Low confidence.Evidence: `src:design-brief`proposed limit
QR reads back `test:qr-read`	Functional test, mark, pack	scanner read	none	none