Choose the prototype process around the question you need answered next.
Part and process opportunities
Appearance models, enclosure prototypes, fixture parts, and final-material samples serve different stages. FDM can test shape, laser profiles can test flat assemblies, and CNC can evaluate fitted metal or engineering-plastic features. One prototype need not answer every question at once.
Design the interface
Define the test objective before adding detail. Preserve interfaces and functional features while simplifying nonessential cosmetics. Record which features are representative and which are placeholders. That prevents a successful visual mockup from being mistaken for a production-qualified design.
Plan for the real use
Keep model and drawing revisions together as the design changes. After testing, incorporate the findings into one controlled release. Batch size should follow design maturity and demand rather than the desire to minimize unit price early.
Prepare a clear manufacturing package
Use a model that represents the intended part, a matching drawing for functional requirements, and a defined material and quantity. Choose the online process for supported configurations. Larger batches, unlisted materials, and special requirements follow custom RFQ. Industry examples describe possible uses; they are not evidence of certification or a past customer relationship.