Runway Analysis answers this simple question for a pilot:
What is the highest takeoff or landing weight I can safely operate out of or into an airport?
From a pilot’s perspective, Runway Analysis provides a single maximum takeoff or landing weight at which safe takeoff or landing is possible. The analysis of this maximum weight compares the available aircraft performance for given meteorological conditions and pilot selected aircraft configuration against multiple constraints, such as available runway length, terrain, and obstacle considerations.
The available aircraft performance is provided by the aircraft manufacturer’s Airplane Flight Manual (AFM). The AFM includes data on how the aircraft performs under specific conditions, but also its limitations, such as climb capability limits, brake energy limits, etc. In addition to these aircraft-specific constraints, environmental constraints such as runway length and slope, as well as terrain and obstacles surrounding the airport are considered in the analysis.
If any one constraint cannot be met at the current takeoff or landing weight, the weight is reduced during the analysis, until a takeoff or landing weight is found, which satisfies all constraints, or takeoff/landing is deemed not possible at any weight.
You can learn more about Runway Analysis here: