---
id: KB-IU-001
url: https://app.codecontract.io/help/manufacturing/document-control-in-manufacturing
idioma: en
categoria: sector-industria
subcategoria: maquinaria
audiencia: usuario
nivel: basico
actualizado: 2026-08-13
tambienEn: [es]
relacionados: [KB-CS-021, KB-CS-010]
citadoPor: [KB-IU-004, KB-IU-005, KB-IU-006]
---

# Document control in manufacturing

_You sit mid-chain: you receive certificates and have to issue your own._

**Responde a:** industrial document control · manufacturing supplier certificates · technical manufacturing documentation · where to start with factory document control

A manufacturer has the documentary problem in both directions at once: it receives certificates from suppliers and has to issue its own to customers. Almost everything that breaks sits in the link between those two directions.

## The three layers, outside in

| Layer | What documentation | What breaks |
| --- | --- | --- |
| Suppliers | Material certificates, test reports, approvals | They expire and nobody looks |
| Equipment and people | Conformity, inspections, operator training | The cross-check between machine and operator |
| Customers | What they ask of you: questionnaires, traceability | It arrives on a short deadline and depends on the other two |

> [!IMPORTANT]
> The customer layer cannot be handled quickly if the first two are loose. A questionnaire asking for material origin with a two-week deadline cannot be answered unless you started asking your suppliers earlier.

## Where to start

**En corto**

- With what expires: it is what can blow up unannounced.
- With linking each certificate to the specific delivery, not merely storing it.
- With the customer who audits you most, building their questionnaire as a process.

> [!WARNING]
> Storing the certificate is not enough: you must be able to say which delivery it belongs to. When a customer complains about a part from two years ago, the question is not whether you hold certificates but which one was that part's.

> [!NOTE]
> Each industrial branch adds its own — automotive demands batch traceability, chemicals demand current composition — but these three layers are common to all.

**Do I start with suppliers or customers?**

Suppliers. Without that, the customer side cannot be answered.

**Does it work if we make to order?**

Especially: each order is a case with its traceability.

**What if our suppliers are outside the EU?**

That is where origin documentation takes longest and where it pays to start earliest.

## Ejemplos

**A manufacturer gets a sustainability questionnaire with a two-week deadline and lacks the data.**

- Answers what it has and states when the rest will come
- Launches an origin request to its suppliers

→ Keeps the customer without committing to invented figures, and answers the next questionnaire in an afternoon.

**Each department keeps its documentation separately.**

- Centralises into a file per product or batch

→ There is one picture.

**The trace breaks between production and despatch.**

- Ties the batch produced to the outgoing delivery note

→ The batch is followed to the customer.

**A client asks about a supply from a year ago.**

- Keeps the file with its date

→ You answer without reconstructing.

**Supplier certificates expire without warning.**

- Records expiries per supplier

→ The warning arrives before the material is used.

**A review asks for evidence of a control.**

- Shows the record of real operations

→ The control moves from assertion to evidence.