What is the purpose of tagging and lockout during maintenance?

• A. Tags are decorative.
• B. Lockout is optional.
• C. Tag-out serves only to document maintenance.
• D. The tagging and lockout process identifies equipment, communicates that it is secured, and prevents accidental operation.

Answer: (D)

Lockout and tagging protect workers by making the status of equipment clear and by physically preventing it from being energized while maintenance is in progress. A tag-out provides a visible warning with who is performing the work and when, signaling that the equipment should not be operated. A lockout adds a physical lock to the energy-control point, ensuring that energy sources—electrical, hydraulic, pneumatic, mechanical, or others—cannot be re-energized until the lock is removed by the person who applied it. Using both together creates a clear identification of the equipment, communicates that it has been secured for maintenance, and prevents accidental or unauthorized startup. This reduces the risk of injuries from unexpected movement or released stored energy and helps maintenance proceed under controlled conditions. The other options miss essential aspects: tags aren’t decorative, lockout isn’t optional, and the process is about more than just documentation—it actually stops operation until it’s safe to proceed.