What type of control involves the inspection of materials and training of employees to ensure quality during the production process?

The correct answer focuses on concurrent control, which is a type of control mechanism that takes place during the actual production process. This control method involves real-time monitoring and evaluation of ongoing activities to ensure that quality standards are being met as the process unfolds. For instance, inspecting materials before they are used in production and training employees on proper procedures can immediately address any issues that arise, thereby preventing defective products from being created.

Concurrent control is particularly effective because it allows for immediate feedback, enabling supervisors to make necessary adjustments on the spot. This ensures that not only is the final product of high quality, but the production process itself aligns with established standards.

In contrast, other types of control, such as feedforward control, apply preventative measures before production begins, while feedback control occurs after the production process has been completed, assessing the outcome rather than the ongoing processes. Control ratio does not pertain directly to the quality of production processes in this context. Understanding these distinctions helps clarify why concurrent control is the method associated with inspection and training during production.