Quality

First Article Inspection for Bathroom Fixture Orders

Between golden sample approval and inspection of the finished lot there is a stage many orders skip: checking the first production unit against the approved sample and drawing before the run continues. A golden sample proves the product can be made correctly; a first article proves that production is making it that way. This guide explains what to check per product line, who performs it and how it differs from AQL inspection.

Published September 23, 2026Last updated September 23, 2026

The short answer

Quick Reference

Point 01: First article inspection (FAI) checks the first production unit against the golden sample and the approved drawing before the run continues.
Point 02: It catches the differences between a sample made with care and a unit made under schedule.
Point 03: Per line: vanities for dimensions, finish, hardware and alignment; tops for drain center, edge and color; bathtubs for drain position, surface and weight as drawn; enclosures for panel sizes and hole positions.
Point 04: It can be done by factory QC, the buyer, or a third party, remotely with photographs and video.
Point 05: The result is a release decision: continue, correct and re-check, or stop. AQL inspection then samples the finished lot.

A worker hand-sanding the solid wood frame of a wall-mounted bathroom vanity

Start here

The Sample Proves the Design; the First Article Proves the Line

A golden sample is made under attention: the best materials, the most experienced hands, and time. Production is made under schedule: the material batch that arrived, the crew on shift, the set-up done that morning. Most differences are harmless; some are not, and those repeat across every unit in the run. FAI finds them in the first unit, while the correction costs one unit rather than a container and a claim.

The sample is made under attention; production is made under schedule
Errors in production repeat across the whole run
FAI finds them in the first unit, before the run continues

What to Check per Product Line

Project detail reviewed against the approved reference

The checklist comes from the approved drawing and the golden sample, and it differs by line. Vanity: overall dimensions against the drawing, finish against the sample under the same light, hardware fitted as specified by model and operating, drawer fronts aligned and doors closing evenly. Top or basin: drain center and tap hole positions against the drawing, edge profile, color and surface against the sample, fit to its cabinet. Solid surface bathtub: drain and overflow position, which is cast and cannot be corrected later, surface finish and color, overall dimensions, and weight against the drawing.

Shower enclosure: panel sizes and glass thickness against the drawing, hole positions for hinges and handles, hardware fitted and operating, profiles and seals as specified, finish against the sample. For coordinated products such as faucets, shower systems and toilets, the same logic applies at the partner factory. The checklist records what was measured or compared, the result, and a photograph.

Vanity: dimensions, finish match, hardware fit, drawer and door alignment
Top or basin: drain center, tap holes, edge, color and surface
Bathtub: drain and overflow position, surface, dimensions, weight as drawn
Enclosure: panel sizes, hole positions, hardware fit, profiles and seals

Who Performs It and How

Shower enclosure reviewed against the approved project reference

Factory quality control performs the first article check on a well-run line, and its record should be available to the buyer. A buyer who wants independence has three options: attend in person, rarely practical for a single unit; send a third-party inspector, effective but costly for one unit; or conduct it remotely, with the factory presenting the first unit on video or in photographs and measurements against the buyer's checklist, with the golden sample beside it. Remote review works well for bathroom fixtures because most checks are dimensional and visual.

Whichever method, the output is a completed checklist, photographs and a release decision. Release means production continues. Correct and re-check means the factory adjusts the set-up, material or process and presents another first unit. Stop means the difference is fundamental and the drawing or the sample has to be revisited. The first article unit is kept at the factory as the reference for the run.

Factory QC performs it as standard; its record should be shared
Independence by attendance, third party, or remote review with photographs and video
Remote works because the checks are dimensional and visual
Outcome: release, correct and re-check, or stop

FAI versus Pre-Shipment Inspection

First article inspection and pre-shipment AQL inspection answer different questions. FAI asks whether production is set up to make the product correctly; it looks at the first unit at the start of the run to prevent a repeated error. AQL inspection asks whether the finished lot is acceptable; it samples the lot after production, according to a sampling plan, to detect defects before shipment. FAI happens early enough to fix the process; AQL happens late enough to judge the result.

A project needs both. Without FAI, a systematic error is found at the AQL stage in every unit sampled, with the whole run made. Without AQL, an FAI-approved process still produces the occasional damaged unit or missing hardware kit that only a sample of the finished lot reveals. The golden sample is the reference for both. Sample approval, first article and pre-shipment inspection together are production control.

FAI: first unit, start of the run, prevents repeated errors
AQL: sampled finished lot, end of the run, detects defects before shipment
Each answers a question the other cannot
The golden sample is the reference for both

Common questions

First Article Inspection Questions

Answers to the checks buyers most often make before using this guide for a project or sourcing decision.

Is first article inspection standard for bathroom fixture orders?

It is standard on a well-run line as factory QC, but not always shared with the buyer. Ask for it on the order and ask for the record.

How many units should be checked?

The first unit of each product line and configuration in the order; a change of configuration or finish is a new first article.

Does FAI delay production?

Briefly, by the time it takes to check the first unit and decide. A correction found later would delay the run far more.

What if the first article does not match the golden sample?

The factory identifies the cause, corrects it and presents a new first unit. If the sample cannot be reproduced in production, the drawing or sample is revised with the buyer's agreement.

Can FAI replace a pre-shipment inspection?

No. FAI checks the set-up at the start of the run; pre-shipment inspection samples the finished lot.

Does WNS Global perform first article inspection?

Yes, as factory QC on the lines it makes, with the record available to the buyer, and it arranges the same at production partners for coordinated products. Remote review with the buyer is offered on request.

A carved solid wood panel with a circular relief detail

In short

Check the First Unit Before Making the Rest

First article inspection compares the first production unit to the golden sample and the approved drawing before the run continues, per product line and configuration, with a recorded checklist and a release decision. It can be done by the factory, the buyer or a third party, remotely if needed. It does not replace pre-shipment AQL inspection; it makes the AQL result better.

First unit against the golden sample and the drawing
Per product line: dimensions, positions, finish, hardware
Release, correct and re-check, or stop
Followed by pre-shipment AQL inspection of the finished lot

Verification sources

Official Sources and Further Reading

Inspection scope, lot definition, acceptance criteria and document requirements must be agreed for the particular order. A general guide cannot replace the named standard, approved sample or written inspection plan.

Setting up production control for an order?