Which of the following is NOT a step of Changeover Reduction?

In the context of Changeover Reduction, one of the main goals is to minimize the time taken for process changeovers, which are necessary for transitioning from one task or product to another. This process is critical in manufacturing and other operations to improve efficiency and productivity.

The correct answer, which identifies an action that is not part of the Changeover Reduction process, highlights the focus on reducing transition times effectively. Transferring external time to internal time involves shifting activities that can be performed while the machine is not running (external) into the time when it is running (internal), which counteracts the principle of reducing changeover times.

On the other hand, observing and understanding the current state of the process, identifying key operations, and transferring internal time to external time are all critical steps in effectively reducing changeover time. They emphasize the assessment of the existing workflow, the segregation of tasks to streamline operations, and maximizing productivity during machine downtime to enhance overall efficiency. Thus, the chosen answer reflects an action that could hinder, rather than facilitate, the Changeover Reduction process.