Abstract—Software organizations that develop their software products using agile software processes, such as Extreme Programming (XP), face a number of challenges in their effort to demonstrate that their process activities conform to ISO 9001 requirements, including product measurement requirements. This paper proposes an auditing model for ISO 9001 measurements requirements that is applicable in agile XP environments. The design of this auditing model is based on some of the Vincenti’s principles on engineering design. The proposed auditing model includes the use of several auditing “yardsticks” derived from ISO 15939, the SWEBOK Guide and the CMMI-DEV guidelines for requirements measurement. This auditing model has been assessed based on case studies selected from the literature.