You step into the shower. It is cold. You crank the knob to hot. Nothing happens. You crank harder. Still nothing. Then all at once, scalding water. You yank it back to cold. Wait. Still hot. Then freezing. Sound familiar?
This is delay. The time between your action and the result. Every system has it. Supply chains, hiring, medication, policy. The longer the delay, the worse the overshoot, the wilder the oscillation.
Try cranking the delay slider to 5 seconds. Then move the desired temperature. Watch yourself oscillate. The fix is patience. Small adjustments. Wait for the system to respond before adjusting again. But humans are terrible at this.
Jargon you just learned
- Delay
- Time between an action and its effect. The gap where bad decisions happen.
- Lag
- Another word for delay. The system has not responded yet, but it will.
- Overshoot
- Going past the target because you kept pushing while the delay hid the result.
- Oscillation
- Swinging back and forth around the target. Caused by delay plus overcorrection.
- Overcorrection
- Making too large an adjustment because you did not see the effect of the first one.
- Settling Time
- How long it takes for oscillations to stop and the system to reach the target.
What to notice
With low delay, the actual temperature tracks the desired one closely. Boring. Good. With high delay, every adjustment overshoots and you get oscillation. The system is not broken. You just cannot see the effect of your actions quickly enough, so you keep pushing. This exact pattern explains why companies over-hire then mass-layoff, why governments overreact to economic data, and why you keep burning yourself in the shower.