Homeostatic Regulation

Origin. Pyotr Anokhin's theory of functional systems (1930s-1970s); Ashby's cybernetic adaptation mechanisms imported into Soviet physiology and engineering.

Mechanism. Maintains a system variable within bounds by feedback: deviation from setpoint triggers corrective action, and the action's magnitude is proportional to the deviation. The essential insight is that stability is active, not passive — it is maintained by continuous work, and the control structure must have response bandwidth matching or exceeding the disturbance bandwidth.

Procedure. Identify the critical variable to stabilize and its acceptable range. Identify disturbances that push it out of range. Design a sensor that measures the variable, a comparator against the setpoint, and an actuator that opposes deviations. The feedback must be negative (counteracting) not positive (amplifying). Compute the required response time: if the disturbance has frequency ω, the control loop must close faster than 1/ω.

Applies to. Process control, organizational performance management, resource allocation, and any system whose environment is turbulent but whose objective is stationary.

Limitations. Oscillation when the feedback delay exceeds the natural period of the system. The comparator must be faster than the system, or the control loop amplifies disturbances instead of suppressing them. Also: homeostasis stabilizes the measured variable, not the unmeasured objective; optimizing dashboard metrics is homeostatic control of the wrong variable.