A notification indicating that a piece of equipment or a service is currently non-functional. This communication method serves as a visual cue, informing individuals that the item should not be used due to a malfunction or maintenance requirements. As an example, a device affixed to a broken elevator informs potential users that the lift is currently unavailable.
The presence of such notices prevents wasted time and potential frustration for individuals attempting to utilize a non-operational facility. Displaying these notices can also contribute to safety, preventing further damage to the malfunctioning item, and avoiding potential injuries arising from its use in a faulty state. Historically, these markers have been a crucial part of public facilities and private businesses, ensuring clear communication about the usability of resources.
