From RFQ to First Article: Where the Lead Time Actually Goes
> In brief > - Each approval stage has its own supplier-side effort. > - The timeline slips where nobody owns the next step. > - A stage with no named evidence is a stage that will not close.
Lead time estimates fail because they are quoted as one number without the assumptions behind it. Breaking the programme into stages shows which parts compress and which are physics.
Our own production and test data are available on request — see how our factory works and contact the engineering team for the documents behind any figure quoted here.
Lead time is the total duration from the initial enquiry to the delivery of the first article, including all stages of the process. Drawing clarification refers to the process of ensuring that all necessary details, such as tolerances and material specifications, are complete and clear. Tooling means the creation or setup of dies and programs needed for manufacturing non-standard parts. Heat treatment is a controlled process used to alter the physical properties of materials, often adding days to the schedule due to batch processing. Sample approval is the stage where the buyer reviews and approves the sample, which can take up to a week and is often assumed to be instantaneous.
A realistic sequence for a custom item.
- Enquiry review and quotation: 1-3 working days if the drawing is complete. Incomplete drawings restart this clock — the most common cause of a slow start is a missing tolerance or material spec.
- Drawing clarification and DFM feedback: 2-5 days, overlapping with quotation. The questions that must be answered here: which tolerances are functional, whether coating goes on before or after threading, and whether the sample must come from the production process.
- Raw material: this cannot be compressed by pressure. Common grades are stocked and add days; special grades, non-standard diameters or unusual stainless sizes may involve mill lead time measured in weeks. Confirming material availability early is worth more than negotiating price.
- Tooling or setup: existing dies and programmes add a day; new tooling for a non-standard head or thread can add 1-3 weeks and is usually non-recurring cost.
- Sampling: 3-10 days depending on the process chain. Heat treatment and coating often run in batches on a schedule, so a sample may wait for the next batch — a real constraint that is invisible on a Gantt chart.
- Sample inspection and shipment: 1-3 days plus transit. For an overseas buyer add courier time and the days the sample sits waiting for a signature.
- Approval: buyer-controlled. The step most often assumed instantaneous and most often taking a week.
- Production: 2-5 weeks for a moderate batch of machined parts, longer where heat treatment and coating are involved or volume is large.
- Inspection, packing and inland transport to port: 3-7 days. Packing per BOM or drawing structure adds time worth planning for.
Standard basis: EN 13670
What compresses and what does not.
COMPRESSIBLE: parallel processing of sample and bulk material procurement, with the risk understood; early drawing clarification; combining coating of sample and bulk in one batch; pre-booking a container slot.
NOT COMPRESSIBLE by pressure: mill lead time for special material, heat-treatment cycle time, coating cure, ocean transit. Trying to compress these converts a delay into a quality problem.
Managing risk inside the schedule.
Order long-lead material against the enquiry, with a cancellation window, when the item is critical.
Ask for sample approval to be binding within a stated number of days, with silence treated as acceptance only if the buyer agreed to that rule in writing.
For phased projects, align production to the construction sequence and ship in instalments. Storing a year of fasteners on site costs more than the freight saved.
Standard basis: EN 10204:2004 — Types of inspection documents
The number to quote internally.
Quote the buyer a date, and give your own project that date minus transit and approval window. The difference is the schedule risk, and it belongs to whoever owns the interface — usually the party controlling approval.
You can start the clock today — send your drawing through the quote page and the stages above apply from receipt.
| Stage | Effort and Lead Time | Consequence for Buyer |
|---|---|---|
| Enquiry Review | 1-3 working days | Delays if drawing is incomplete |
| Drawing Clarification | 2-5 days | Delays if tolerances or coating unclear |
| Raw Material | Days to weeks | Special grades add significant time |
| Tooling Setup | 1 day to 3 weeks | New tooling adds non-recurring cost |
| Sampling | 3-10 days | Batch processes can delay samples |
| Sample Inspection | 1-3 days + transit | Overseas buyers face longer transit times |
| Approval | Buyer-controlled, often 1 week | Assumed instant, but often delayed |
References and standards.
- ISO 9001:2015 — Quality management systems
- ISO 14001:2015 — Environmental management systems
- ISO 45001:2018 — Occupational health and safety management
- NIST material measurement standards
- ISO 2859-1 — Sampling procedures for inspection by attributes
- EN 10204:2004 — Types of inspection documents
About us: This article covers the realistic breakdown of a custom fastener programme, which steps compress well, and which ones cannot be shortened by pressure. Our team has extensive experience in managing custom fastener projects. Our contact page provides access to our engineering team for specific inquiries, and the about page documents our production and test data. This article was reviewed by the Qianheng Formwork Engineering team.