Students can model a hole pattern that looks correct and still print a part that will not assemble. The usual mistake is not a software bug. It is a missing conversation between design intent and inspection. In MET 135 and MET 201, that conversation happens on the same week: CAD on one bench, calipers and an instant-measurement system on the other.
I treat measurement as a system — instrument, operator, method, environment, and data — not as a drawer of tools. Once students see a printed boss measure 0.4 mm short of the drawing, GD&T stops being a symbol chart and becomes a language they need.
The course companion is Engineering Metrology. The workbook is Metrology for Engineering Technicians. Graphics foundations live in Engineering Principles for Technicians and the Engineering Graphics companion site.
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