What is the initial step in making a 'go/no-go' decision?

The initial step in making a 'go/no-go' decision involves assessing the flight mission and conditions. This critical evaluation determines whether it is safe and viable to proceed with the planned flight. It includes considering various factors such as weather conditions, aircraft performance, pilot readiness, and any potential hazards that may affect the flight.

The reason this step is fundamental is that it establishes the context within which all subsequent decisions are made. If the mission parameters and environmental conditions do not align with safe operational standards, it might not be prudent to proceed, regardless of other factors such as aircraft specifics or passenger arrangements. Thus, ensuring that the mission can be safely conducted under the current conditions is paramount in determining whether to launch or not.