Quality Inspection Services
Pre-Production Sample Review in China | Golden Sample Review | G&D
Independent Pre-Production Sample Review in China. Check sample workmanship, dimensions, materials, color, function, labels and packaging against your requirements before mass production and establish a clear reference for later production inspections.
Pre-Production Sample Review in China
Independent review of your pre-production sample before mass production, helping you verify product details against your requirements and establish a clear reference for production and later inspections.
A pre-production sample is often the last opportunity to identify product differences before bulk production begins. Once an incorrect detail is approved and repeated across thousands of units, correcting it can become much more difficult and expensive.
G&D provides independent Pre-Production Sample Review services in China. We check the proposed sample against the specifications, drawings, artwork, packaging requirements and other references you provide, then document any differences or concerns for your review.
The final decision to approve the sample for mass production remains with the buyer.
Starting from USD 160 per man-day.
When Should You Arrange a Pre-Production Sample Review?
A Pre-Production Sample Review is particularly useful when:
- You are developing a new product.
- You are working with a new supplier.
- The product is customized or made to your specifications.
- The supplier has submitted a revised sample after previous comments.
- Dimensions or construction details are important.
- Color, finish or appearance must match an agreed reference.
- Product function needs to be checked before mass production.
- Accessories or components must be confirmed.
- Artwork, logos or labels must be correct.
- Retail packaging is an important part of the product.
- You want to establish an approved reference sample for later production and inspections.
- Previous sample versions contained problems that must be corrected before production.
The earlier these points are clarified, the easier it is to prevent an incorrect sample from becoming the reference for mass production.
What We Check During a Pre-Production Sample Review
The exact review scope depends on the product and the references available.
Appearance & Workmanship
The sample can be reviewed for visible workmanship and appearance issues such as:
- Surface defects
- Poor finishing
- Incorrect assembly
- Sewing or construction issues
- Damage
- Contamination
- Loose or poorly fitted components
- Visible differences from the approved design or reference
Dimensions & Weight
Important dimensions and weight can be measured and compared against the specified requirements where applicable.
This may include:
- Overall dimensions
- Component dimensions
- Thickness
- Length or width
- Product weight
- Packaging dimensions
- Other buyer-specified measurements
Any relevant tolerances should be provided before the review.
Materials & Components
Observable materials and components can be compared with the specifications, BOM, approved references or information provided by the buyer.
This may include:
- Component type
- Construction
- Hardware
- Accessories
- Fabric or material references
- Visible material characteristics
- Component quantity
Visual inspection cannot independently confirm material composition or properties that require laboratory analysis.
Color & Finish
Where suitable references are provided, the sample can be checked for:
- Product color
- Surface finish
- Coating appearance
- Printing
- Pattern
- Texture
- Other visual details
Color evaluation can be affected by lighting and reference conditions. Where precise color matching is critical, an agreed physical color standard or other appropriate method should be used.
Construction & Assembly
We can review whether the sample's construction and assembly match the available specifications or reference information.
This may include:
- Component placement
- Assembly method
- Alignment
- Connections
- Fasteners
- Seams
- Joints
- Structural details visible during the review
Function Checks
Basic functional checks can be performed where applicable and where the required test method is available.
The purpose is to identify obvious differences or functional concerns before the sample is approved for production.
Specialized performance, safety, durability or regulatory testing may require laboratory testing. Lab Testing Assistance can support coordination with an independent laboratory where required.
Accessories
Required accessories can be checked against the provided list or specification.
Examples may include:
- Spare parts
- Cables
- Hardware
- Manuals
- Inserts
- Tools
- Product-specific accessories
Artwork & Branding
Artwork and branding can be compared against the approved files or references.
This may include:
- Logos
- Printed graphics
- Text
- Positioning
- Orientation
- Product markings
- Packaging artwork
Labels & Markings
Where applicable, the review can include:
- Product labels
- Size labels
- Care labels
- Warning labels
- Barcode labels
- Country-of-origin markings
- Other buyer-specified markings
Retail Packaging
If retail packaging is part of the pre-production sample, it can be reviewed for:
- Packaging type
- Size
- Construction
- Artwork
- Labels
- Inserts
- Product fit
- Protective materials
- Packing method
- Overall presentation
Buyer-Specified Critical Points
If you already know which product details are most important or have caused problems in previous samples, these points can be incorporated into the review checklist.
What Should the Sample Be Compared Against?
A sample can only be meaningfully reviewed when there is a clear reference for comparison.
Depending on the product, please provide relevant information such as:
- Product specification sheet
- Technical drawings
- Bill of materials or component information
- Dimension requirements and tolerances
- Physical or documented color reference
- Previous sample comments
- Previous approved or reference sample
- Product photos
- Artwork files
- Logo files
- Label requirements
- Packaging specifications
- Accessories list
- Function requirements
- Buyer inspection checklist
- Other critical product requirements
The more clearly the requirements are defined, the more useful the sample review can be.
If no specification or approved reference exists for a particular feature, the report can document what is observed, but it may not be possible to determine whether that feature is correct.
From Pre-Production Sample to Golden Sample
A pre-production sample does not automatically become a golden sample simply because it has been produced or reviewed.
A typical process is:
Supplier prepares the pre-production sample -> Sample is reviewed against requirements -> Differences or issues are identified -> Supplier makes corrections if necessary -> Buyer reviews the final version -> Buyer approves the sample as the production reference
Once approved by the buyer, that sample or clearly documented version can serve as a reference for mass production and later quality inspections.
G&D's role is to provide an independent review and document the findings.
The buyer remains responsible for the final approval decision.
This distinction is important because an inspection company should not decide whether a commercial product is approved for production on behalf of the buyer unless specifically authorized to do so.
How Our Pre-Production Sample Review Works
1. Send Us the Sample & Requirements
Provide the pre-production sample together with the relevant specifications, drawings, artwork, packaging requirements, previous comments and other references.
2. We Confirm the Review Scope
We review the available information and confirm which product details, measurements, functions, accessories, labels, artwork and packaging points should be checked.
3. Sample Is Checked Against References
The sample is examined and compared with the agreed specifications and references.
Measurements, basic function checks and other applicable checks are performed according to the agreed scope.
4. Differences & Findings Are Documented
Any observed differences, defects, unclear points or other relevant findings are documented with descriptions and photos where appropriate.
5. Receive Your Sample Review Report
You receive an independent report showing what was checked and what was found.
You can then use the report, together with the physical sample and your commercial requirements, to decide whether to approve the sample, request revisions or require another sample.
What Information Should You Provide?
Useful information may include:
- Purchase order or product reference
- Product specifications
- Technical drawings
- Dimensions and tolerances
- BOM or component information
- Product photos
- Previous sample
- Previous sample comments
- Color reference
- Artwork files
- Logo files
- Label requirements
- Packaging artwork
- Packaging specifications
- Accessories list
- Function requirements
- Testing instructions
- Known quality concerns
- Buyer checklist
- Critical approval points
If the supplier has already revised the sample, please also provide the comments or problems from the previous version so the corrections can be specifically checked.
What Will You Receive in the Sample Review Report?
Depending on the agreed scope, the report may include:
- Product and sample information
- Sample version or identification where available
- References used for comparison
- Appearance and workmanship findings
- Dimensions and measurement results
- Weight where applicable
- Material and component observations
- Color and finish observations
- Construction findings
- Basic function-check results
- Accessories
- Artwork and branding findings
- Labels and markings
- Packaging findings
- Photos
- Differences from the provided requirements
- Items requiring buyer clarification
- Items that could not be verified
- Relevant limitations
The report records the condition and findings of the sample reviewed at that time.
It does not itself constitute buyer approval for mass production.
Pre-Production Sample Review vs Initial Production Check (IPC)
These services take place at different stages and answer different questions.
Pre-Production Sample Review
Usually takes place before mass production begins.
The main question is:
Does the proposed sample match the buyer's requirements closely enough for the buyer to consider approving it as the production reference?
The focus is the sample itself and its agreement with the provided specifications and references.
Initial Production Check (IPC)
Takes place after actual mass production has started, when relevant materials, components and first production units are available.
The main question is:
Has mass production started according to the approved requirements and production reference?
IPC focuses on early mass production rather than approval of the pre-production sample.
A typical sequence may therefore be:
Pre-Production Sample Review -> Buyer Approval -> Mass Production Starts -> Initial Production Check
If you want to verify early mass production after sample approval, see our Initial Production Check (IPC) service.
Pre-Production Sample Review vs Sample Picking
These services also serve different purposes.
Sample Picking
The main question is:
Where did this sample come from?
Sample Picking focuses on independently selecting physical samples from production, finished goods or warehouse stock and documenting their origin and selection process.
Pre-Production Sample Review
The main question is:
Does this sample match the agreed requirements?
The service focuses on examining the sample against specifications, drawings, artwork, packaging requirements and other references.
Depending on the situation, Sample Picking and Pre-Production Sample Review can complement each other.
For example, an independently selected production sample may later be reviewed against agreed requirements for a specific quality-control purpose.
What Can and Cannot Be Verified?
A Pre-Production Sample Review Can Help Verify
Depending on the agreed scope and available references:
- Appearance and workmanship
- Dimensions and weight
- Observable materials and components
- Color and finish
- Construction and assembly
- Basic function
- Accessories
- Artwork and branding
- Labels and markings
- Retail packaging
- Differences from the provided specifications or reference
- Previously requested sample corrections
A Pre-Production Sample Review Cannot Guarantee
The review cannot by itself guarantee:
- That future mass production will exactly match the reviewed sample
- The quality of the entire future production batch
- Future production consistency
- Factory production capability
- Material composition requiring laboratory analysis
- Chemical or regulatory compliance requiring formal testing
- Long-term durability unless specifically tested
- Performance beyond the agreed basic checks
- Buyer or customer acceptance
- Marketplace acceptance
- Future production changes made after the review
An approved sample is an important production reference, but it is not evidence that future mass production will automatically match it.
Product inspections during and after production may still be required.
Pre-Production Sample Review Cost in China
Starting from USD 160 per man-day.
The final cost depends on factors such as:
- Number of samples
- Number of SKUs
- Product complexity
- Number of specifications or measurements
- Function checks required
- Packaging review requirements
- Review location
- Time required to complete the agreed scope
Travel or other additional costs may apply depending on where the review takes place and how the sample is handled.
Any laboratory testing or other third-party costs are separate unless specifically included in the quotation.
We confirm the review scope and cost before booking.
Frequently Asked Questions
What is a Pre-Production Sample Review?
A Pre-Production Sample Review is an independent check of a proposed product sample against the buyer's specifications and references before mass production.
It helps identify differences or unclear points before the buyer decides whether the sample should be approved as the production reference.
Is a pre-production sample the same as a golden sample?
Not necessarily.
A pre-production sample is a sample prepared before mass production. It becomes an approved or "golden" reference only after the buyer has reviewed and approved the appropriate version for production.
Does G&D approve the sample for mass production?
No. G&D independently reviews the sample and reports the findings.
The final decision to approve, revise or reject the sample remains with the buyer.
Can you compare the sample with our technical drawings and specifications?
Yes. Technical drawings, dimensions, specifications, artwork and other references can be incorporated into the review scope.
The relevant documents should be provided before the review.
Can you check product color?
Yes, where an appropriate color reference is available.
However, visual color assessment can be affected by lighting and viewing conditions. Where precise color matching is critical, an appropriate physical or instrumental color-control method may be required.
Can you check materials?
Observable materials and components can be compared with the provided specifications or references.
Material composition or properties requiring chemical or physical analysis must be confirmed through appropriate laboratory testing.
Can you check packaging and artwork?
Yes. If the packaging, artwork, labels and related references are available, these can be included in the sample review.
Does an approved sample guarantee that mass production will be the same?
No.
An approved sample provides a reference for production, but the actual production batch still needs to be controlled by the supplier and may require IPC, DPC or FRI depending on the buyer's quality-control plan.
What is the difference between Pre-Production Sample Review and IPC?
Pre-Production Sample Review evaluates the proposed sample before mass production.
IPC checks the beginning of actual mass production against the approved requirements and references.
How much does a Pre-Production Sample Review cost in China?
Our Pre-Production Sample Review service starts from USD 160 per man-day.
The final cost depends on the number of samples, complexity, review scope, location and time required.
Review the Sample Before Mass Production Begins
A pre-production sample can become the reference used by the factory throughout mass production. If an incorrect detail is approved at this stage, the same problem may be repeated across the full order.
An independent review gives you documented information before you make the final approval decision.
Send us your pre-production sample and product requirements to arrange an independent Pre-Production Sample Review in China.