A measure of the product itself, either direct or indirect. [ ISO/IEC 14598, ISO/IEC 9126-1, ISO/IEC/IEEE 24765 ]
- An external measure of an attribute of a computing system (such as the response time to user input) is an indirect measure of attributes of the software as the measure will be influenced by attributes of the computing environment as well as attributes of the software. [ ISO/IEC 9126-1 ]
- The number of lines of code, complexity measures, the number of faults found in a walk through and the Fog Index are all internal measures made on the product itself. [ ISO/IEC 9126-1 ]
