Which of the following types of controlled work is NOT explicitly mentioned?

The type of controlled work that is not explicitly mentioned in the context of your question is Level II. In quality assurance and various certification standards, references often focus on specific areas such as Nuclear work, Scope of Certification, and SFCC (which stands for certain frameworks or compliance criteria).

Level II typically refers to a classification of work that might involve more complexity or oversight compared to entry-level or Level I work. However, it is not always defined as a standalone category within controlled work documentation or regulatory standards. As such, recognizing Level II as an unspecified type of controlled work indicates that it might fall under broader classifications rather than being explicitly discussed or defined.

In contrast, Nuclear and SFCC both relate to specific regulated environments where rigorous standards and controlled workflows are essential for ensuring safety and compliance, making their mention more likely in related materials. The Scope of Certification also usually outlines the boundaries of what is certified, which is fundamental in understanding controlled work settings in QA practices.