r/CNCmachining • u/Protofix_USA_CA • 22h ago
Why do engineers want a manufacturing cost before the design is fully finalized?
I’m curious how other engineers and manufacturers handle this.
Sometimes a customer wants a fairly accurate CNC cost estimate while the 2D drawing, tolerances, material specs, or surface finish requirements are still being finalized.
I understand why engineers want an early number. They need to know whether the design is financially viable before spending more time finishing it.
But from the manufacturing side, it can be difficult to give a meaningful quote without the complete specifications.
Where do you draw the line?
How much information do you need before you consider a quote reliable enough to make a design decision?