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The answer depends on the product your prototyping and at what stage of prototyping your at. If your only testing one particular feature or aspect of the product further prototyping needs to be done to test every feature.
Designing the product for manufacturing also known as DfM (Design for Manufacturing) – prototyping or create a production prototype to test all features, functionality, performance and aesthetics keep to the original product design specification you can move to designing tooling/programming for manufacturing.
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