TOP Sample
A TOP sample is a product sample made at the initial stage of mass production using the same materials, specifications, and processes as production, and it is confirmed and approved as the quality standard for production items.
Contents6 sections
Definition and place in the process
A TOP sample is a verification sample made using the actual mass-production line, as well as the fabric, trims, pattern, and specifications for mass production, either after production starts or just before it starts. It is used to judge the quality at the start of mass production and serves as the standard for subsequent inspection and sewing.
Its purpose differs from that of a first sample made at the planning stage or a sales sample made for presentation and orders. A TOP sample is a reference sample used to confirm whether the product can be manufactured as intended in the mass-production process.
- The usual flow is specification finalization, review of various samples, production preparation, TOP sample approval, continuation of mass production, and final inspection.
- The approved TOP sample is retained by both the factory and the client, and is treated as the reference sample during mass production.
Main items to check
In the review, not only appearance but also consistency with the specifications and the approved sample is assessed comprehensively. In mass production in particular, the finish can change depending on the sewing equipment, operators, and lot differences, so it is important to check the garment in its worn state as well.
The fabric color and texture, trim color and attachment position, pattern matching, and the expression of processing are items that are difficult to correct once mass production has begun. If necessary, dimensions and appearance after washing or processing are also checked.
- Actual measurements and dimensional tolerances against the size chart
- Sewing quality such as seams, stitch count, seam allowance finish, puckering, and skipped stitches
- Product numbers, colors, fiber content labels, and attachment positions for fabric, trims, and labels
- Appearance such as left-right differences, dirt, damage, press condition, and pattern matching
- Requirements needed before shipment, such as needle detection, care labels, and hangtags
Practical approval and process management
The client should determine the review items, acceptance criteria, approver, and response deadline in advance and share them with the factory. If corrections are needed, do not leave them as verbal instructions; reflect them in the specifications, size chart, photos, and correction instructions, and keep a change history.
Approval is not merely confirmation that the sample has been checked; it is an agreement on under what conditions mass production may proceed. In the case of conditional approval, clearly define the correction points, target quantity, and whether recheck is required, and make sure the information is shared within the relevant departments at the factory.
- Clearly note the size, color, production date, and target production lot on the sample.
- Keep photos taken during the review and the decision record so the approved sample can be compared with mass-produced items.
- Confirm whether the corrections affect cut pieces or items already produced.
Notes for ordering and quality control
Even if the TOP sample is approved, quality differences may occur if the fabric lot, trim lot, processing conditions, or work conditions change afterward. It is necessary to compare against the approved sample at intermediate stages of mass production and again before shipment to detect differences early.
If the TOP sample includes substitute materials or provisional specifications that differ from those for mass production, treating it as a normal approved sample may lead to incorrect judgments. The reason for the substitution, the timing for switching to the official materials, and the method of recheck should be managed in writing.
In inspection standards, distinguish between minor differences that can be accepted and defects that require correction, sorting, or re-production. For areas that are easy to judge differently, add comments to the approved sample and align the standards among the inspection staff.
Differences from similar terms
A first sample is a prototype used to confirm the design, pattern, and specification at an early stage. By contrast, a TOP sample is made under the conditions used for mass production, with emphasis on confirming mass-production quality.
A PP sample generally refers to the final approval sample before mass production. Meanwhile, TOP sample is a term often used for a sample made at the time mass production starts up. However, the way these terms are used and the timing of production may differ depending on the client or factory.
A sales sample is a sample used to show the product image at exhibitions or for sales activities, and it does not guarantee the standard for mass-production quality. For mass-production judgment, use a TOP sample or approved sample based on the official specifications and materials.
Frequently asked questions
When is a TOP sample approved?
In general, it is checked and approved just before mass production starts or at the start-up stage. It is important to evaluate it with the materials, trims, patterns, and sewing processes for mass production all in place. Even after approval, it is compared against the standard sample during mass production and before shipment.
Are a TOP sample and a PP sample the same?
Both are used for quality confirmation before or during mass production, but they are not necessarily synonymous. A PP sample is often the final approval sample before mass production, while a TOP sample often refers to a sample from the mass-production start-up stage. The production timing, materials, and approval conditions should be made clear at the time of ordering.
If corrections are found in the TOP sample, should mass production be stopped?
If the corrections affect safety, legal labeling, key dimensions, appearance, durability, or similar items, confirm the scope of impact and consider stopping or holding mass production. Even for minor corrections, the client and factory need to agree on the target quantity, corrective method, and whether recheck is required.
