What is the primary purpose of a Lockout/Tagout (LOTO) program in industrial maintenance?

• A. To prevent unexpected energization or start-up of equipment during service, protecting workers from injury by isolating energy sources and tagging them to indicate locked or secured states.
• B. To improve production speed during maintenance.
• C. To document maintenance history for auditing.
• D. To reduce energy consumption during idle periods.

Answer: (A)

Lockout/Tagout is all about stopping hazardous energy from energizing equipment while someone is servicing it. The idea is to isolate all energy sources—electrical, hydraulic, pneumatic, mechanical, thermal, and stored energy—and apply a lock on the energy-control device. The lock physically prevents the machine from being turned back on, and a tag serves as a visible warning that work is in progress. This combination protects workers from unexpected start-up or release of stored energy, which is a common cause of injury during maintenance.

The approach isn’t about speeding up maintenance, keeping records, or saving energy during idle times; its purpose is worker safety by ensuring machines cannot be energized while someone is working on them.