Which of the following could signal a need for maintenance?

Unusual noises from equipment are a strong indicator that maintenance may be required. These sounds can signify underlying problems such as mechanical wear, misalignment, or component failure. Equipment is generally designed to operate smoothly and quietly, so any strange noises could suggest that something is amiss and could lead to more significant issues if not addressed promptly. Regular monitoring for these signs is crucial for maintaining equipment longevity and ensuring safe operation.

In contrast, increased production output, higher employee satisfaction, and consistent operation without issues generally indicate that the equipment is functioning well and does not require immediate maintenance. These factors suggest efficiency and reliability rather than the need for attention or repair.