Slide 1
Build to answer a question
An engineering prototype is a practical way to test an assumption before committing to a final design. Its value depends on the question it is built to answer.
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A rough shape model can test reach and access without using production materials. That same model may reveal little about fatigue life or thermal performance.
Slide 2
Choose what must be realistic
A prototype need not reproduce every feature equally. Engineers identify which physical properties or interfaces control the behaviour under investigation.
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A reduced-scale model may change the balance between forces. Scaling dimensions alone does not guarantee that flow, stiffness or heat transfer will reproduce the full-size result.
Slide 3
Define a result before the test
A useful test has stated conditions, measurements and acceptance criteria. These make the outcome interpretable beyond a general impression that the prototype worked.
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A test that exercises only an easy operating point may miss an important limit. Selecting cases from expected service and credible extremes makes the evidence more relevant.
Slide 4
Requirements and user needs differ
Verification asks whether stated requirements were met. Validation asks whether the resulting system serves its intended use in the intended environment.
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A device can satisfy a poorly chosen requirement and still frustrate its user. Testing both questions helps expose errors in the specification as well as in the implementation.
Slide 5
Record what the prototype cannot prove
Results should identify the tested configuration and known limitations. Changing materials, software or interfaces can change how far the evidence carries.
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Configuration records let later teams connect a result to the design actually tested. Without that link, a successful demonstration can become an unsupported claim about a different product.