As an international standard, it ensures that a part designed in one country can be accurately manufactured in another.
By using general tolerances for non-critical features, manufacturers avoid the high costs of over-engineering parts that don't need extreme precision. Iso 2768 General Tolerances Pdf
Before this standard, engineers had to painstakingly label every dimension with a plus-minus value or rely on vague "good workmanship" claims. ISO 2768 provides several critical advantages: As an international standard, it ensures that a