1. Why inspections matter (even for “good” factories)

Even excellent factories have bad days: machine issues, staff changes, rushed orders, material substitutions. Inspections are how you verify, not just trust, that everything matches the spec.

Inspections help you:

  • Catch problems while they are still cheap to fix
  • Give clear, evidence-based feedback to suppliers
  • Build a history of performance over multiple orders
  • Reduce returns, complaints and firefighting for your team

The goal is not to be adversarial. It’s to give both you and the factory a clear, shared picture of what “good” looks like.

2. Building a simple inspection plan

You don’t need a 50-page quality manual to start. A basic plan can have just three checkpoints:

  • Pre-production – are the right materials and tooling in place?
  • Inline – are units coming off the line within spec?
  • Pre-shipment – is the finished batch acceptable to ship?

For low-risk, low-value products, you might combine these. For higher-value or regulated items, you’ll want all three.

3. Pre-production checks

Pre-production inspections happen before mass production starts. The goal is to confirm that the inputs match the approved spec.

Pre-production checklist

  • Confirm raw materials match agreed grades/specifications
  • Check key components or sub-assemblies on hand
  • Verify tooling, moulds or jigs match approved samples
  • Confirm any critical test equipment is available and calibrated
  • Review packaging materials and print proofs

Fixing an issue here might mean changing a material order or adjusting a mould. Fixing it after 5,000 units are made is a very different conversation.

4. Inline inspections

Inline inspections happen while production is in progress—often when 20–60% of the order is complete.

The aim is to spot trends early:

  • Are certain defects showing up repeatedly?
  • Is there excessive variation between units?
  • Are any workstations or processes clearly overloaded?

Inline checklist

  • Random sample from different points in the line
  • Basic functional tests where applicable
  • Dimensional checks on critical measurements
  • Visual inspection for cosmetic defects
  • Spot checks on packaging and labelling

If problems are found, you can pause or slow production while root causes are fixed, instead of discovering issues at the very end.

5. Pre-shipment inspections

Pre-shipment inspections are the last major gate before you release the balance payment and goods leave the factory.

Typical approach:

  • Inspection when at least 80% of the order is completed and packed
  • Sampling based on an agreed AQL (Acceptable Quality Limit)
  • Clear pass/fail criteria agreed in advance

Pre-shipment checklist

  • Verify quantity and assortment (SKUs, colours, sizes)
  • Re-run critical functional tests
  • Check appearance and workmanship against approved samples
  • Confirm barcodes, labels and regulatory marks
  • Inspect outer cartons and palletisation

If defects exceed agreed limits, you can request rework, replacement or other corrective actions before agreeing to ship.

6. How to structure reports and decisions

An inspection is only useful if the results are clear enough to drive a decision. We recommend a simple structure for every report:

  • Summary – pass, pass with reservations, or fail
  • Key findings – highlights and critical issues
  • Defect breakdown – counts by type and severity
  • Photos and videos – with clear labels
  • Recommendations – ship, rework or re-produce

Over time, these reports become a powerful source of data: you can see which suppliers improve, which slide, and where process changes have actually worked.