Definition
A predetermined point during a takeoff or flight at which the pilot must commit to a specific course of action based on aircraft performance, position, and conditions — typically whether to continue the maneuver or reject it. In takeoff performance planning, it is the point at which the pilot decides to either continue the takeoff or abort and stop on the remaining runway.
Plain English
A spot you've chosen ahead of time where you have to make a clear go/no-go choice. Past that point, you're committed; before it, you can still change your mind safely.
Context Anchor
Used in takeoff performance planning, especially when runway length, obstacles, aircraft weight, or weather make the takeoff margin important.
Derivation
Decision comes from a Latin word meaning “to cut off” or “settle.” In this use, the decision point is where the pilot cuts off the uncertainty and makes the planned go-or-stop choice.
Why Pilots Care
It prevents runway overruns by ensuring the pilot has a pre-planned point at which one option or the other is guaranteed to remain possible.
Intuition Check
Do not think of a decision point as a vague moment when the pilot starts wondering what to do. In this context, it is a planned point set before the takeoff begins.
Example Sentence 1
Before taking off from the short strip, she briefed her decision point: if the aircraft wasn't airborne by the second runway marker, she would abort.
Example Sentence 2
With an engine failure after the decision point, the pilot continued the takeoff because stopping would have required more runway than remained.