Final answer:
A potential nonconformity against ISO 9001:2015 during an audit could be insufficient support, such as inadequate training of personnel or insufficient resources, which compromises the effectiveness of the QMS.
Step-by-step explanation:
A valid nonconformity recorded against the requirements of ISO 9001:2015 during a quality management systems audit related to support could be the inadequate provision of resources needed to implement, maintain, and continually improve the quality management system (QMS). For instance, if an organization fails to properly train its personnel or doesn't provide enough human or infrastructural resources to ensure that its product or service meets quality expectations, this could be considered a nonconformity. The support clause of ISO 9001:2015 also includes requirements for monitoring and measuring resources, organizational knowledge, as well as the maintenance of infrastructure and environment for operation of processes.