singleloop

Singleloop is a term used in multiple domains to describe a single feedback mechanism in a system. In control theory and engineering, a single-loop control system uses feedback to keep a process variable close to a desired setpoint. The system compares the measured output with the reference value and makes adjustments to the actuator input accordingly. This form of control relies on a stable model of the plant and the assumption that the goals and environment are correct, and it does not alter the governing objectives or the underlying process model.

In organizational learning and systems thinking, single-loop learning refers to routines that correct errors by changing actions or methods within existing norms, policies, and objectives. Problems are addressed by adjusting practices, not by questioning or changing the governing variables themselves. By contrast, double-loop learning involves reevaluating and possibly changing the underlying goals, policies, or assumptions that guide action.

The concept highlights a distinction between simple corrective action and deeper change. Single-loop approaches tend to be faster and less disruptive but may be insufficient for addressing root causes or fundamental misalignments. In engineering, single-loop control is often contrasted with more complex strategies such as multi-loop or adaptive control, which can respond to changing models or objectives.

Terminology varies; the compact form “singleloop” appears in informal discussions, but related terms include single-loop control and single-loop learning, which are more widely used in their respective fields.