What characterizes an open-loop system?

An open-loop system is characterized specifically by its lack of feedback. It operates based only on the input it receives at any given time without monitoring the output to adjust or modify its function. Therefore, it does not utilize any feedback mechanism to assess the outcome or performance of its operation.

In contrast, the other characteristics described do not define open-loop systems. For instance, systems that can operate automatically often include feedback controls, which is a hallmark of closed-loop systems. Feedback is essential in those instances to ensure the system can adapt and maintain desired outcomes. Similarly, systems producing multiple outputs can belong to either open-loop or closed-loop categories, depending on how they function regarding feedback and control. Thus, the correct understanding of an open-loop system centers around its need for input each time it’s used without the influence of output monitoring.