Why STEP stays the practical CAD standard

STEP is the practical handshake between a customer's CAD system and a manufacturer's quoting desk. The customer does not have to use the same software, and the manufacturer receives a solid, measurable description instead of a screenshot or a list of dimensions copied by hand.

• STEP is a neutral exchange format, so customers and manufacturers do not need to use the same CAD system.
• For an initial quote, volume, surface area and the bounding box are useful inputs for material, finishing and machine-fit checks.
• A good file still needs validation: assemblies, scale mistakes and incomplete solids can produce misleading values.
• STEP improves the starting point for a quick quote; it does not replace drawings, tolerances or an engineering conversation where they matter.

For a first quote, that is already valuable. DemoQuoter reads the solid with OpenCascade and exposes volume, surface area, bounding box and topology values. Those numbers give an estimator a repeatable starting point for material, size and machine-fit checks.

STEP is not a complete manufacturing specification, however. A file can contain an assembly, a wrong unit or an incomplete solid. It also normally does not replace the drawing, tolerance notes or a conversation about how the part will actually be made.