Which PMCS role directly deals with diagnostics and fault corrections?

The role that directly deals with diagnostics and fault corrections is indeed the Workflow Mechanics. This position is essential in the PMCS (Preventive Maintenance Checks and Services) process, as mechanics are responsible for not only identifying issues with equipment but also for performing the necessary repairs to correct those faults. They possess the technical skill set required to understand mechanical systems, troubleshoot problems, and apply the appropriate solutions, which is critical in ensuring that machinery and vehicles remain operational and safe for use.

Mechanics often use diagnostic tools and equipment to assess performance and pinpoint failures, making their role pivotal in the maintenance cycle. Their ability to analyze symptoms and apply remedial actions directly influences the effectiveness of the maintenance operations and the readiness of the assigned equipment. In contrast, other roles like clerks, operators, and supervisors focus on managing workflow, documentation, or overseeing personnel, but do not engage in the hands-on diagnostic and correction processes as mechanics do.