Lockout/tagout is important in maintenance because it prevents unexpected energization and protects workers from injury.

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Lockout/tagout procedures focus on controlling hazardous energy so equipment cannot start or release stored energy while a worker is servicing it. To do this, all energy sources are identified, the machine is isolated from them, a lock is applied to the disconnect or valve, and a tag is attached to warn that maintenance is in progress. The lock remains in place until the work is finished and the area is verified safe, with the person who applied the lock the only one who can remove it. This prevents unexpected energization and protects workers from injury from electric shocks, moving parts, or stored energy. While good communication or efficiency can improve as part of a safety culture, the primary purpose here is to prevent injury during service, not to speed up the machine or boost efficiency.