Final answer:
Lockout and tagout are safety processes to ensure machinery is safely shut down and not restarted during maintenance. They are not necessarily performed by the same person doing the servicing, highlighting the importance of clear communication for workplace safety.
Step-by-step explanation:
The question refers to the procedures known as lockout or tagout, which are critical safety practices in industrial and maintenance environments. They are designed to ensure that machinery is properly shut off and not started up again before the completion of maintenance or servicing work. This is essential to prevent accidental start-up of equipment, which could result in injury or death. The lockout process involves placing a physical lock on the energy isolating device of machinery, while tagout involves placing a warning tag on it.
The person performing the servicing or maintenance does not necessarily have to be the same person who applies the lock or tag, but it is crucial that there's clear communication and understanding among all workers involved to maintain safety. This procedure is mandated in many countries by health and safety regulations to prevent accidents in the workplace, especially in industries that involve heavy machinery and equipment.