Section 16 of 103
15. Units, Quantities, Dimensions and Coordinate References
Stable section ID: S05-CON-015-SECTION-16 · 10 content blocks
System05 shall use the International System of Units as its primary measurement system unless an approved regional or domain-specific profile requires another system.
Alternative units may be provided for convenience, but the authoritative value and conversion basis shall be declared. Rounded converted values shall not silently replace authoritative values.
Every engineering quantity shall include:
a numerical value or defined range;
an applicable unit;
a tolerance or uncertainty where relevant;
the applicable measurement condition;
sufficient precision for its intended use.
Dimensions shall distinguish nominal, actual, minimum, maximum, reference, target, and verified values. A value without a declared tolerance shall not be assumed to represent unlimited precision.
Coordinates shall identify the applicable origin, axes, orientation, datum, reference frame, and version. Local, component, assembly, building, site, robotic, and global coordinate systems shall not be interchanged without an approved transformation.