It is a common practice to lockout and/or tagout control devices. In a nuclear power plant’s control room with its many analog controls, you might (for example) see red covers over specific switches.

In order to prevent the unexpected energizing or startup of machinery or equipment during servicing or maintenance, a lockout/tagout plan must be custom-tailored to each facility. The lockout/tagout ...

Coordinating procedures reduces confusion/omissions and improves efficiency. It also forces procedure writers to put the information in chunks that fit preset categories. This makes for leaner ...