A prototype earns its place when it helps you decide what to do next. Before changing a CAD model or sending it to a printer, write down one question the next version should answer.

Choose a question that changes the next step

“Does this enclosure work?” leaves too much open. A more useful question is “Can the intended components fit without blocking the cable route?” That question tells you which dimensions to gather, which areas to inspect and what a physical prototype would need to reveal.

The saved enclosure example shown here has an open top and internal partitions. Use it to think about the space each compartment needs and how neighboring features constrain a change. For your own design, start with the component outline, mounting locations and access requirements. Write down the dimensions you know and the assumptions you still need to check.

Inspect the model and plan a meaningful revision

Rotate the model and inspect the region tied to your question. If cable access is the issue, trace the intended route from the component to the opening. Check nearby walls and partitions, then decide whether to move an opening, lower a partition or change the component position. Choose a revision whose effect you can inspect.

Describe the change together with the conditions to retain. For example: move the cable opening toward the connector while keeping the outer envelope and mounting positions. After the revision, compare that area with the earlier version. A useful comparison shows both the intended change and whether the surrounding conditions still hold.

Keep the evidence before choosing the next tool or prototype

Save the question, the model versions and the views or measurements used to compare them. If you export a file, keep it with the corresponding revision so the screen view and the file can be traced to the same design. Record what you observed and which uncertainty remains.

Then choose the next action. A clearance question may call for a focused physical fit check. A question about editability may call for reopening the exported model in the intended CAD tool and making the required change. The task and the evidence you need should shape the tool choice. WeeklyVentures explores this connection between prototype evidence, research and product decisions.

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