Electric Wheelchair QC Checklist for Incoming Inspection

Your container has arrived, the forwarder calls it delivered, and now the chairs are yours — problems included, unless you catch them first. An electric wheelchair QC checklist for incoming inspection is the simple discipline that separates distributors who sleep well from distributors who spend their margins on warranty repairs. It does not require a laboratory, a third-party inspector, or an engineering degree. It requires a printed checklist, a phone camera, and two hours of methodical work before the cartons disappear into your warehouse. Here is the uncomfortable part most new importers learn the expensive way: the factory’s own QC and your incoming inspection are not the same job. Factory QC checks whether the production line built what it was told to build. Your incoming inspection checks whether what arrived is what you ordered, in sellable condition. Between those two checkpoints sit weeks of handling, loading, ocean freight, and unloading — plenty of room for damage, substitution, and honest mistakes. For the bigger picture of the buying journey, our guide to importing electric wheelchairs from China walks through the full process.

Why Do You Need an Incoming Inspection When the Factory Already Does QC?

Because you are inspecting two different things. The factory inspects the product as it leaves the line: dimensions, functions, cosmetics, packaging. You inspect the shipment as it reaches you: everything the factory checked, plus everything that could have changed in transit. A chair that passed factory QC can still arrive with a cracked weld from a forklift strike, a battery disconnected by vibration, or a manual in the wrong language. There is also a commercial reason that matters more than most buyers admit. The moment you sign the delivery note without reservations, your leverage on any claim drops sharply. A documented incoming inspection, done before you sign, turns “the chairs arrived damaged” from your word against the forwarder’s into a dated, photographed fact.

What factory QC actually covers

A serious manufacturer’s QC covers in-line checks during assembly, a final function test of every unit (or a defined sample), and packaging verification. At our own facility, for example, the quality system runs under ISO 13485:2016 — but even the best system cannot control what happens after the carton is sealed. Factory QC is necessary. It is simply not sufficient.

What only you can catch on arrival

Only you can verify the count against the packing list, the model mix against your purchase order, the language of the manuals, and the serial number sequence. These are shipping and order-accuracy issues, invisible to everyone except the person opening the cartons. That person is you. Key Takeaway: Factory QC proves the chairs were good when they left. Incoming inspection proves they are good now that they are yours. Do both, and document the second one.

What Should Your Electric Wheelchair QC Checklist Cover First?

Start with structure before you start opening cartons. A usable electric wheelchair QC checklist has six inspection areas, each with a clear pass/fail line decided before you touch a single unit. The mistake most first-time importers make is inspecting “generally” — walking around the chairs, noticing things at random, and calling it done. Work the list top to bottom, unit by unit, and write down every result. The six areas are: shipping documents and count, carton and packaging condition, frame and welds, folding mechanism, electrical system and battery, and joystick plus basic functions. Keep the order fixed every time so nothing gets skipped when you are tired at unit number forty.

The six inspection areas

Each area answers one question. Documents: did we receive what we ordered? Packaging: did it survive the journey? Frame and welds: is the structure sound? Folding mechanism: does it fold, lock, and unfold safely? Electrics and battery: are the connections intact? Joystick and functions: does the chair drive? If any area cannot answer its question with a clear yes, record it.

Setting pass/fail before you open a carton

Decide your fail lines in advance, in writing, and share them with whoever helps you inspect. “Frame paint scratch longer than 5 cm: fail” beats “looks a bit scratched” every time, because it removes argument — with your warehouse staff today and with your supplier tomorrow. Send the checklist to the factory before shipment so they know exactly what you will check. Suppliers who know the test prepare for the test. Key Takeaway: A checklist with six fixed areas and pre-written fail lines turns inspection from guesswork into a repeatable process. Send it to your supplier before the goods ship.

Area	Core question	Typical fail example
Documents and count	Is this what we ordered?	Model mix does not match the purchase order
Packaging	Did it survive transit?	Crushed corner with frame damage underneath
Frame and welds	Is the structure sound?	Cracked weld at the folding hinge
Folding mechanism	Does it fold and lock safely?	Locking latch does not engage fully
Electrics and battery	Are connections intact?	Loose battery connector; chair will not power on
Joystick and functions	Does the chair drive?	Joystick responds in only three directions

How Do You Decide How Many Units to Inspect?

Inspecting every unit of a 200-piece order sounds thorough and is usually impractical. The professional answer is sampling: inspect a defined portion, chosen at random, and let the results speak for the whole lot. The concept behind it is called acceptance sampling, and the best-known framework is AQL — acceptable quality limit. The honest way to use AQL is to understand the idea rather than memorize tables: you and your supplier agree in advance what defect levels are acceptable for different severity classes, then you inspect a sample and accept or reject the lot based on what you find. Read the concept properly before you use it — the acceptance sampling overview explains the logic without the jargon. What matters is the discipline: random selection, a pre-agreed sample size, and a pre-agreed decision rule. “We will open 20 random cartons; more than two major defects and we hold the lot for discussion” is a complete sampling plan.

The AQL idea in plain language

AQL sorts defects into classes — critical, major, minor — and sets a different tolerance for each. A critical defect (a safety issue, like a folding lock that fails) has essentially zero tolerance. A minor defect (a small paint blemish under the seat) has some tolerance. The point is not the exact numbers, which depend on the standard tables and your agreement with the supplier. The point is that you decide the classes and the response before the goods arrive.

What to agree with your supplier before the shipment leaves

Put three things in writing before the container is loaded: the sample size or sampling rule you will use, the defect classification you will apply, and what happens if the lot fails — re-inspection, sorting, replacement, or credit. Also agree on who pays for return freight in each case. If your order is small — and with a 1-piece MOQ your first order may literally be one chair — the sampling question answers itself: inspect 100% of it. Our notes on MOQ for custom electric wheelchairs explain why small trial orders are the right place to build your inspection habit. Key Takeaway: You do not need to inspect every unit, but you do need a pre-agreed sampling rule, a defect classification, and a written plan for what happens if the lot fails. Agree on all three before shipment.

Decision	Why it matters	When to decide
Sample size / sampling rule	Makes results representative, not anecdotal	Before the goods ship
Defect classes (critical/major/minor)	Removes argument about what counts as a fail	Before the goods ship
Failed-lot procedure	Defines re-inspection, sorting, or credit	Before the goods ship
Return-freight responsibility	Avoids the most common claim dispute	Before the goods ship

What Should You Check on the Frame and Welds?

The frame is the one part you cannot economically replace, so it gets the closest look. Start with a slow visual pass over every tube, joint, and bracket on each sampled unit. You are looking for cracks, dents deeper than the paint, bent tubes, and welds that look wrong — porous, undercut, or simply missing where there should be one. Pay special attention to the folding hinge area, because stress concentrates at exactly those points. Then do the hands-on checks, which take about five minutes per chair and catch what eyes miss. Grip the push handles and rock the chair firmly side to side; listen for clicks or movement that suggest a loose joint. Press down hard on the seat and footrest; the frame should feel like one rigid piece. Check that every bolt you can see is present and tight.

Where cracks and weak welds hide

Cracks start where stress concentrates: at weld toes, around bolt holes, and at the folding pivot. Look at these areas under good light, and run a fingertip along suspect welds — your finger finds a crack edge your eye slides past. On folding models, open and close the frame slowly while watching the hinge welds; movement under load reveals gaps that are invisible when the chair sits still.

The hands-on checks that take five minutes

Rock, press, twist, listen. Rock the chair laterally for loose joints. Press the seat and footrest for structural flex. Twist the push handles gently for play in the folding lock. Listen for rattles that indicate something loose inside the frame tubes. None of this requires tools beyond your hands. Key Takeaway: Eyes find the obvious; hands find the rest. Rock, press, and listen on every sampled unit, and give the folding hinge the closest look of all.

Check	How	Reject if
Weld integrity	Visual + fingertip along all structural welds	Crack, porosity, or missing weld at any joint
Frame alignment	Sight down the frame tubes; unfold and refold	Visible bend, twist, or hinge that binds
Bolt completeness	Count and tug every visible fastener	Any missing, stripped, or finger-loose bolt
Rigidity	Rock laterally; press seat and footrest hard	Clicks, play, or flex beyond a firm feel

How Do You Test the Folding Mechanism?

The folding mechanism is the most-used moving part on the chair and the most common source of customer complaints, so test it like a customer will use it — repeatedly. Fold and unfold each sampled chair at least five full cycles. It should move smoothly, without grinding, binding, or sudden drops in the last few centimeters. Watch the cables as the frame folds; they should follow their guides, not get pinched between moving tubes. Then check the locks, because a folding chair that does not lock is a safety problem, not a cosmetic one. Engage the locking latch and try to force the frame closed with firm hand pressure. It must hold. Run your hand along the folding joints and check the pinch-point guards where a user’s fingers could be caught — good designs guard these, and you should verify the guards are present.

The fold-unfold cycle test

Five cycles minimum per sampled chair, at normal speed — not gently, not violently. Listen for changes between the first and fifth cycle; a mechanism that gets rougher with repetition has a wear or alignment issue. Consistency across units is what you are really testing.

Locks, latches, and pinch points

Engage every lock and attack it with firm hand force — the lock must win. Check that latch springs return crisply and that release levers need deliberate action, not a brush of the hand. Verify finger guards at the hinge points are present and secure; a missing guard is a defect, because it is a ten-cent part that prevents a very expensive injury claim. Key Takeaway: Five fold cycles, a force test on every lock, and a check of the finger guards. The folding mechanism is where daily-use reliability is won or lost.

Test	Method	Fail sign
Fold-unfold cycling	5 full cycles at normal speed	Grinding, binding, or worsening roughness
Open-position lock	Engage lock; force frame toward closed	Any movement or partial disengagement
Cable routing	Watch cables through full fold cycle	Pinching, stretching, or escaping guides
Pinch-point guards	Visual + fingertip at hinge areas	Missing, loose, or cracked guard

What Should You Look for in the Electrical System and Battery?

You are not doing deep electrical diagnostics on the receiving dock — that is a workshop job. You are doing a disciplined visual and basic-power check that catches the transit damage and assembly errors behind most dead-on-arrival chairs. Start with the battery: confirm the chemistry and capacity you ordered (lithium vs. lead-acid, amp-hour rating on the label), check the case for cracks or swelling, and verify the connector seats firmly with a positive click. Then trace the visible wiring. Cables should run through their clips and guides, connectors fully seated, no bare wire at any plug. Look specifically where cables pass near the folding hinge — transit vibration and repeated folding conspire to chafe insulation there. Finally, power the chair on: the battery indicator should light and hold steady. If a unit will not power on, check the obvious first — battery seated, connectors tight — and record the failure with photos.

Connectors, cables, and the battery case

Seat and unseat each main connector once; it should engage with a firm click and show no bent pins. Flex cable looms gently near the hinge and look for cracked insulation or exposed copper. Check the battery case for impact marks, especially on the corners — a dropped battery can look fine and still have internal damage, so any sign of a hard drop goes on the record.

What the battery label must show

The label is a compliance document, not a sticker. Verify the voltage and capacity match your purchase order and the chemistry is what you ordered, and confirm the required transport markings for lithium batteries are present — your forwarder needed the UN38.3 test report and MSDS to move these legally. A battery whose label does not match the paperwork is a customs risk as well as a quality issue. Key Takeaway: Match the battery to the order, seat every connector, trace cables past the hinge, and power each sampled chair on. Anything that will not power up gets photographed and recorded immediately.

Item	Check	Fail sign
Battery identity	Label vs. purchase order (chemistry, voltage, capacity)	Wrong chemistry or capacity; label-paperwork mismatch
Battery condition	Case, corners, swelling, connector pins	Cracks, swelling, impact marks, bent pins
Wiring	Routing through guides; insulation at hinge	Chafed insulation, unseated connectors, bare wire
Power-on	Battery indicator lights; stable charge display	No power, flickering display, error on startup

How Do You Check the Joystick and Basic Functions?

The function test is the moment of truth, and it takes about two minutes per chair. Power on, wait for the controller to initialize, then drive slowly in every direction: forward, reverse, left, right, and gentle diagonals. The response should be smooth and proportional — push a little, move a little. Confirm the electromagnetic brake engages when you release the joystick: the chair should stop promptly, not coast. Also test the secondary controls: horn, lights, battery gauge under load. Drive each sampled chair a short distance — even ten meters across the warehouse floor reveals a pull to one side, a wobbling wheel, or a motor that sounds different from its siblings. “Sounds different” is a valid finding when you compare across units.

The two-minute function test

Power on, drive all directions, test brake engagement, try the horn and lights, watch the battery gauge while driving. Do it the same way on every unit so your comparisons are valid. If a chair behaves differently from the rest of the sample, record it even if you cannot name the cause. Pattern-spotting across units is the real skill of incoming inspection.

What you should NOT try to diagnose on the dock

Do not open the controller, do not attempt resets or reprogramming, and do not try to interpret fault codes beyond recording exactly what you see. Deep controller diagnostics belong in a workshop with the factory’s documentation — improvising on the dock risks turning a warranty claim into “customer tampered with the electronics.” Your job is to find and document the symptom precisely; the factory’s job is to diagnose it. Our battery lifespan guide is useful background on normal battery behavior, and our maintenance guide covers the routine care that keeps the joystick and electrics healthy after delivery. Key Takeaway: Drive every sampled chair in all directions, confirm the brake engages on release, and record symptoms precisely without attempting workshop-level diagnosis. Finding is your job; fixing is the factory’s.

Function	Test	Expected result
Drive response	Joystick in all directions + diagonals	Smooth, proportional movement each way
Brake	Release joystick while moving slowly	Prompt stop, no coasting
Speed settings	Cycle through available speeds	Noticeable, consistent change per setting
Horn / lights	Activate each	Audible horn; lights on/off cleanly
Straight tracking	Drive 10 m on flat floor	No pull to one side; no wheel wobble

What Should the Packaging, Labels, and Documents Tell You?

Packaging is part of the product — it is what protected your chairs across an ocean, and its condition tells you how rough the journey was. Inspect cartons before you open them: crushed corners, punctures, water stains, and re-taped seams each get noted against the carton number. Photograph any damage before opening, because the forwarder’s liability ends where your documentation begins. Inside, check the foam protection, the plastic moisture bag, and whether the chair is actually secured. Labels and documents are where order accuracy lives. Every carton should carry a shipping mark with the model, quantity, and carton number in sequence; every chair should have a serial number plate, and the numbers should run in the expected range without gaps or duplicates. Inside the carton, expect the packing list, the user manual in the correct language, and the warranty card. A missing manual is not a minor oversight — it is a box you cannot sell in most markets. The document discipline in our import guide applies here too: the paper trail must match the physical goods, line for line.

Carton, foam, and moisture protection

Open damaged cartons first and inspect those chairs most carefully — damage concentrates where the carton shows it. Check that the moisture barrier bag is sealed, not torn, and that desiccant bags are present if your shipping route warrants them. Note the carton quality itself: double-wall export cartons are the standard for this product, and thin domestic-grade cartons on an ocean shipment are a finding worth raising with the supplier.

Serial numbers, labels, and the paper trail

Record the serial number of every sampled unit and check the sequence for gaps, duplicates, or numbers outside the range the factory confirmed. Verify the model on the serial plate matches the model on the carton and on your purchase order — mixed models in one shipment are a classic packing error. Confirm the manual language, the warranty card, and any market-specific inserts. Paperwork errors are the cheapest defects to fix and the most embarrassing to discover after the chairs are sold. Key Takeaway: Photograph carton damage before opening, verify serial numbers against the confirmed range, and confirm every carton contains the manual, warranty card, and packing list. Paperwork accuracy is part of quality.

Item	Check	Why it matters
Carton condition	Crush, puncture, water, re-taping — photographed first	Establishes forwarder liability; predicts hidden damage
Interior protection	Foam, moisture bag, desiccant, chair secured	Determines whether transit protection was adequate
Serial numbers	Sequence vs. factory-confirmed range	Gaps/duplicates signal packing or record errors
Documents	Packing list, manual (correct language), warranty card	Missing documents make the unit unsellable in-market

What Counts as a Fail — and How Do You Document It?

Not every finding rejects a shipment. Professionals sort defects into three classes, and the response follows the class. A critical defect affects safety or makes the chair unusable — a folding lock that does not engage, a battery that will not hold charge, a frame crack. Zero tolerance: the affected units are rejected, full stop. A major defect impairs function or salability — a joystick that responds in only three directions, a missing manual, the wrong battery capacity. These trigger the failed-lot procedure you agreed with the supplier before shipment: sorting, replacement, or credit. A minor defect is cosmetic and does not affect use — a small paint blemish, a slightly crooked label. Note them, but do not hold up a shipment over them. Documentation is what turns your findings into leverage. For every defect, take clear photos: one wide shot showing the unit and its serial number, one close-up of the defect itself. Shoot short video for anything functional — a folding lock that slips, a joystick that sticks. Write each finding up the same day with the date, the serial number, the defect class, and the photo references. Then send the report to the supplier promptly and factually, referencing the pre-agreed fail procedure. Emotion weakens claims; dated evidence strengthens them.

Critical vs major vs minor

Classify by consequence, not by annoyance. Ask: could this hurt someone (critical)? Could this stop the chair being sold or used normally (major)? Is it cosmetic only (minor)? When in doubt between two classes, take the higher one — you can always downgrade after discussion, but upgrading later looks like moving the goalposts.

Photos, video, and the email that protects you

Your claim email should be boring: date, purchase order number, serial numbers affected, defect class, what the agreed procedure says, and the evidence attached. Copy the forwarder on transit-damage findings. Keep every reply. This file — inspection record plus correspondence — is also what backs your own warranty position with your customers, because it proves the defect predates your handling. For how to frame warranty terms with your supplier, see what to ask about electric wheelchair warranty; and if a failed unit needs components rather than a full replacement, our spare parts page covers what is normally available. Key Takeaway: Classify every defect as critical, major, or minor; photograph and number everything; and send a factual, dated report referencing the procedure you agreed before shipment. Evidence is leverage.

Severity	Example	Action
Critical	Folding lock fails; frame crack; battery safety issue	Reject affected units immediately; stop the lot
Major	Dead joystick direction; wrong battery; missing manual	Invoke the pre-agreed failed-lot procedure
Minor	Small paint blemish; crooked label	Record; claim or accept per agreement

Conclusion

An incoming inspection is not distrust — it is the professional close of the purchasing loop. Work your electric wheelchair QC checklist in the same order every time: documents and count, packaging, frame and welds, folding mechanism, electrics and battery, joystick and functions. Sample by a pre-agreed rule, classify defects by severity, and document everything with photos and serial numbers. If you are building a private-label line, this discipline matters twice as much — your brand is on the carton, so the quality is your reputation. Our OEM vs ODM guide explains the two cooperation models, and whichever you choose, the inspection habit is the same. We build to a 1-piece MOQ with a 7-day lead time after payment, and we welcome buyers who inspect — a customer with a checklist is a customer we can keep.

FAQ

Should I inspect every unit or just a sample?

For small orders, inspect everything — with a 1-piece MOQ, your first order may be a single chair, and a full inspection takes under an hour. For larger lots, use a pre-agreed sampling rule: random selection, defined sample size, and a written decision rule for the lot. Apply it consistently and document the method alongside the results.

What if I find problems after the forwarder has delivered and I already signed?

You can still claim, but your position is weaker — which is exactly why inspection happens before signing. If you discover issues later, document them immediately with dated photos, determine whether they are transit damage (forwarder) or product defects (supplier), and notify the responsible party in writing without delay.

Can I ask the factory to do the incoming inspection for me?

No — that is the factory’s own QC, not an incoming inspection. What you can do is hire an independent third-party inspection company to check the goods before they ship, which is common for larger orders. Even then, do your own receiving check on arrival: inspectors verify the factory’s output, while you verify what actually reached your warehouse.

How long does an incoming inspection take per unit?

Plan roughly 15–25 minutes per sampled chair once you are practiced: a few minutes each for documents, packaging, frame, folding, electrics, and the function test, plus photo time for any defects. A 20-unit sample is a solid half-day for one person.

What if the cartons arrive damaged but the chairs inside look fine?

Photograph the carton damage before opening, inspect those chairs first and most carefully, and record the carton numbers. If the chairs genuinely check out, note the packaging failure as a finding to raise with the supplier — the protection was inadequate even though you got lucky this time. If any chair shows damage consistent with the carton damage, that is a forwarder claim, and your pre-opening photos are the evidence.