Closing the loop is a phrase used in robotics. Open-loop systems are when you take an action and you can’t measure the results—there’s no feedback. Closed-loop systems are when you take an action, you measure the results, and you change your action accordingly. Systems with closed loops have feedback loops; they self-adjust and quickly stabilize in optimal conditions. Systems with open loops overshoot; they miss it entirely.

www.edge.org/conversation/chris_anderson-closing-the-loop