Incoming QC for wearable safety lights should be a short, traceable warehouse procedure: select units across the received lot, confirm identity and kit contents, inspect transport-sensitive parts, test modes and charging, record each sample, then release or hold inventory under a rule agreed before inspection. It should not become a second factory audit, and it should not begin after stock has already been mixed into saleable inventory.
This page is the operational checklist for warehouse inspectors. For carrier condition, quarantine, claim timing and commercial disposition, use the broader delivery acceptance guide. Keeping those roles separate prevents two nearly identical inspections and makes responsibility clearer.
Prepare the check before the cartons arrive
The inspector needs the PO, packing list, SKU and color breakdown, approved specification or golden-sample record, expected accessories, label examples, pre-shipment result and any accepted deviations. The warehouse system should also have a hold location and status code ready. If questionable stock cannot be blocked, even a good inspection will not protect customers.
Write the release rule on the inspection sheet. State the sample size, which observations are zero-tolerance, what count triggers expanded checking, and who can approve a deviation. Do not allow a busy shift to invent the rule after defects appear.
Select samples across the delivery, not from the nearest carton
Start with the lot definition. A lot should be a quantity produced under sufficiently consistent conditions and presented for one acceptance decision. If the delivery contains different models, revisions, suppliers, production dates or clearly separated batches, inspect them as separate populations unless a qualified plan says otherwise.
Spread the sample across pallets, carton positions and identifiers. Include cartons from the front and rear of a pallet, upper and lower layers where safe, and at least one carton showing ordinary handling stress. Record every carton number and unit or lot code selected. Do not accept samples placed on a table by the supplier or warehouse unless you can verify where they came from.
If the contract uses statistical acceptance sampling, ISO 2859-1:2026 provides lot-by-lot schemes indexed by acceptance quality limit. Incoming QC still needs product-specific defect definitions. A wrong model, abnormal battery condition or unapproved configuration may require a different rule from a small cosmetic mark.
A practical 15-minute receiving screen
- Identity: scan or read the SKU, model, revision, lot code and unit/package labels. Compare them with the PO and approved reference.
- Kit contents: count the light, charging cable, mount, instructions and ordered accessories. Check color and connector type.
- Physical condition: look for cracks, distorted clips, loose lenses, water marks, corrosion, damaged ports, swollen housings or parts moving inside.
- Basic function: operate every required mode in the correct sequence. Observe LED color, consistency, switch response and low-battery behavior where visible.
- Charging: connect the supplied or approved cable and power source. Record connector fit, indicator behavior and any intermittent contact, heat, odor or abnormal response.
- Packaging and traceability: verify barcode, language, carton label and the link between unit, inner pack and master carton.
The screen is designed to catch wrong goods, fulfillment errors and transport-sensitive failures quickly. It does not prove full runtime, IP performance or long-term durability. Those claims need their agreed test evidence.
Incoming QC checklist and stop rules
| Checkpoint | Record | Pass condition | Stop or expand when |
|---|---|---|---|
| Model and revision | SKU, lot code, labels, color, mount and mode sequence | All selected units match the approved order | Any unapproved substitution or mixed revision appears |
| Package contents | Contents of each opened carton/unit pack | Required accessories and quantities are present | A repeated shortage, mixed kit or wrong connector appears |
| Housing and mount | Individual defect code plus overview/detail photos | No damage affects use, retention, sealing or agreed appearance | Cracks, deformation, wetness, corrosion or a repeated pattern appears |
| Modes and controls | Result for each required mode and sample ID | Correct color, order and stable operation | Wrong configuration, intermittent output or switch failure appears |
| Charging behavior | Cable, power source, indication and observed condition | Normal connection and indication without abnormal heat | Swelling, odor, overheating, damaged electrical parts or repeated charging failure appears |
| Labels and traceability | Scanned codes and carton/unit relationships | Codes read correctly and identify the received population | Stock cannot be traced or destination markings are incorrect |
A stop rule prevents an inspector from completing a routine sample while a serious pattern grows. When a zero-tolerance condition appears, isolate the unit and affected population, stop unsafe testing and notify the authorized quality contact. For ordinary major defects, follow the written acceptance or expanded-sampling rule.
How to check each product area without overtesting
Configuration: compare against the controlled sample acceptance record. Pay attention to mode order and mounts; these are easy to change without making the product look obviously different.
Packaging: use the packaging and label checklist for destination language, barcode, instructions and carton marks. Scan representative codes rather than judging printed appearance alone.
Charging: verify the supplied cable and agreed connector against the charging cable control guide. A light that arrives partly charged can pass a short function check even when its cable or port is unreliable.
Visible output: incoming QC should verify color, mode and obvious inconsistency. Do not make unsupported distance claims from a bright warehouse aisle. If recognition performance is in dispute, follow the controlled setup in the visible-distance evidence guide.
Field suitability: a warehouse screen cannot confirm comfort, glare or retention during real work. Use a separate field-test scorecard when a new configuration, mount or user group is introduced.
Record results by sample, not only by total
| Field | Example of a usable entry |
|---|---|
| Receiving case | PO, delivery date, carrier reference and warehouse receipt number |
| Population | SKU/revision, lot code, pallets, cartons and received quantity |
| Sample source | Pallet 2, carton 17, unit 4; selected by inspector |
| Identity result | Model, color, modes, mount, label and kit match: yes/no |
| Functional result | Each mode, switch and charging result with actual observation |
| Defect | Requirement, condition, photo IDs, classification and affected sample |
| Containment | Blocked quantity, warehouse location and system status |
| Decision | Release, expanded check, partial release or hold; approver and time |
“10 checked, all OK” is too weak when a later customer complaint arrives. Individual results reveal whether failures cluster in one carton, lot or configuration. They also allow comparison with the pre-shipment inspection report.
What to do when a sample fails
First protect people and inventory. Isolate units with swelling, leakage, unusual odor, excessive heat or damaged electrical parts and follow the applicable battery and workplace procedures. Do not repeatedly charge a suspect unit to reproduce a dramatic result.
For other failures, preserve the received state. Assign a defect code, photograph the full unit and detail, retain its packaging, and record the source carton and lot. Then decide whether the issue is isolated or could affect a wider population. A wrong accessory in one carton may justify targeted carton expansion; the same wrong accessory across different pallets suggests a lot-wide packing control problem.
Do not repair, reset, relabel or discard every failed item before the supplier has enough evidence to investigate. If replacement or credit may be requested, check the evidence expectations in the warranty replacement questions.
Release inventory in controlled units
Release the lot when required checks pass, no unresolved stop condition exists, traceability is intact and the authorized person signs the disposition. Partial release is appropriate only when acceptable stock is physically and digitally separable from the affected population. If carton or lot boundaries are unclear, keep the containment wider.
If the sample fails under the agreed plan, do not quietly increase the sample until the result looks better. Follow the specified rejection, sorting or reinspection process. Record any buyer concession with affected quantity, reason, commercial treatment and whether the next order’s control plan changes.
Keep the checklist short and improve it with evidence
Review incoming findings by SKU and lot each month or quarter. Remove checks that never affect a decision, and strengthen checks around actual failure modes. If charging failures rise, add connector and cable evidence. If shortages repeat, increase carton-content controls. If nothing changes after a defect, the checklist is paperwork rather than quality control.
OBO can prepare a Guardian ProX wearable safety light sample and an incoming QC sheet matched to your warehouse. In your inquiry, include quantity, SKU mix, pallet/carton format, scanning system, required accessories, approved modes, charging setup and the conditions that trigger an inventory hold.
Official reference
Incoming QC should reconcile the received carton population before drawing product samples. Follow the wearable safety light carton quantity verification guide when shortages, tail cartons or mixed packs could distort the receiving decision.
