Inbound Quality Control for Indian D2C Brands

A defect found at the factory costs you a rework. The same defect found by a customer costs you the product, the forward freight, the return freight, a refund, a support interaction and a public review. The ratio is not close.

Brands using contract manufacturers usually have a QC process that reads: someone opens a few cartons at the warehouse. That is not quality control. That is hope with a box cutter.

AQL sampling, explained plainly

You cannot check every unit. Checking a sample and inferring the lot is a solved statistical problem, standardised as ISO 2859-1 and mirrored in India as IS 2500 Part 1.

Three inputs drive it. Lot size, which is the number of units in the batch. Inspection level, where General Level II is the normal default. And the AQL, which is the maximum percentage of defective units at which you will still accept the lot.

The standard gives you a code letter, then a sample size, then an accept number and a reject number. For a lot of 4,000 units at General Level II with AQL 2.5, the code letter is L, the sample is 200 units, accept on 21 defects and reject on 22.

Note what that means. You are not accepting a perfect lot. You are accepting a defined and priced level of imperfection. Set it consciously rather than inheriting the inspector’s default.

Defect classification

• Critical. Unsafe, illegal or non-functional. A sharp edge, a missing legal metrology declaration, wrong net quantity on pack, an electrical fault, a missing FSSAI or BIS mark where one is required. Standard AQL is 0. One critical defect rejects the lot.
• Major. The customer would notice it and would return it. Wrong shade, broken zip, print out of register, a leaking seal, a missing component. Standard AQL is 1.0 or 2.5.
• Minor. Cosmetic and unlikely to trigger a return. A loose thread, a faint carton scuff, marginal label misalignment. Standard AQL is 4.0.

Write these three lists yourself, per product, with photographs of accept and reject examples. A defect that is not on the list is a defect the factory will argue about at 11pm on a dispatch day.

What a pre-dispatch inspection actually checks

Book it when production is at least 80 percent complete and packed. A real pre-dispatch inspection covers six areas.

• Quantity. Count cartons, confirm the lot matches the purchase order, and confirm unfinished units are not being counted as finished.
• Workmanship against your defect lists, on an AQL sample drawn at random from across the lot, not from cartons the factory hands over.
• Measurement and function. Dimensions against tolerance, weight against declared net quantity, and whatever function test the product demands, whether that is fill level, cap torque or a power on check.
• Colour and material against the approved golden sample and lab dip, under a controlled light source.
• Labelling and barcode. MRP, net quantity, manufacture date, batch code, manufacturer or importer details, and a live scan of every barcode variant.
• Packing. Drop test, carton markings, shipping marks, master carton count, and the dimensional weight of the shipper so your freight cost is not a surprise.

The inspector returns a report with photographs, the sampling maths, and a clear pass, fail or conditional pass. Conditional pass means rework and re-inspect. It does not mean ship it and hope.

Writing a spec sheet a factory cannot argue with

Every dispute starts in the same place: what did we actually agree. A good spec sheet closes that door.

• Every dimension with a tolerance. Not approximately 250mm. Write 250mm plus or minus 2mm.
• Materials with grade and GSM or micron, not adjectives. 300 GSM SBS board, not thick board.
• Colour by Pantone reference plus a signed physical golden sample, with a delta E tolerance if you can measure it.
• Net quantity, fill tolerance, and the legal declaration exactly as it must print on pack.
• The critical, major and minor defect lists with reference photographs.
• The AQL plan and inspection level you will apply, named in the purchase order.
• Packing specification down to unit carton, inner and master, with counts and dimensions.

Sign the golden sample in duplicate. One stays with you, one stays at the factory, both dated. When a dispute happens, that sample settles it in ten minutes.

The cost of catching it late

Run the arithmetic once for your own product. Take a 2,000 unit lot with a 5 percent major defect rate, so 100 bad units.

Caught at the factory before dispatch, you pay the manufacturing cost of 100 units of rework plus a day of schedule.

Caught at your warehouse on inbound, you pay the same rework plus inbound freight already spent, plus the cost of returning or scrapping, plus the stockout while replacements are produced.

Caught by 100 customers, you pay 100 refunds at selling price, 200 legs of freight, 100 support interactions, and some share of those becoming one star reviews that suppress conversion on every unit you sell afterwards. On most D2C SKUs the final number lands ten to twenty times higher than the factory number.

The inspection is not an expense line. It is the cheapest insurance in your supply chain.