# Manufacturing & industrial production use cases

> Connect batch documents, engineering changes, and supplier evidence to recorded approvals.

Canonical page: https://www.truthlocks.com/industries/manufacturing
Category: Industry & infrastructure

Manufacturers need to know which specification or quality record supported a decision. Truthlocks helps teams share checkable document references and action history across production and supply workflows.

## Production quality: Identify the issued batch document package

A batch package can contain report revisions that are difficult for recipients to distinguish.

### What to record

Record the batch reference, approved report fingerprints, responsible issuer, and recorded review or release event.

### What to review

Compare the supplied documents with the signed package and assess the underlying quality evidence through your normal controls.

### The outcome

A checkable reference for the documents issued with a production batch.

## Engineering operations: Trace the approval behind a specification change

Production and engineering may refer to different versions of a changed specification.

### What to record

Link the specification fingerprint, change reference, approving identity, and reported implementation event in a signed action history.

### What to review

Compare the specification used downstream with the approved version and investigate any mismatch before proceeding.

### The outcome

A clearer connection between the proposed change, approval, and reported implementation.

## Supplier quality teams: Preserve the evidence behind supplier assessment

Supplier test documents can change while purchasing and quality teams review them.

### What to record

Record supplier references, submitted document fingerprints, assessment version, and the authorized reviewer’s outcome.

### What to review

Check the reviewed version and independently assess supplier capability and the quality claims it contains.

### The outcome

An assessment history that makes its supporting supplier evidence easy to identify.

## Before you begin

Start with one quality or engineering document workflow. Existing production controls and qualified reviewers remain responsible for product quality and release.

## Relevant capabilities

- [Digital records](https://www.truthlocks.com/product/attestation-service)
- [Action receipts](https://www.truthlocks.com/product/receipts)
- [Procurement workflows](https://www.truthlocks.com/product/procurement)

These are practical workflow examples, not certification claims or a record of customer deployments.