What is the factor used to determine the distance from the FAF to the runway on the profile view?

The factor used to determine the distance from the Final Approach Fix (FAF) to the runway in a profile view is plate dependent. This means that the specific approach procedure as outlined in the approach chart will dictate the required distance. Each standard instrument approach procedure has been developed with certain design criteria that include the distance from the FAF to the runway, accommodating factors like the required descent angle and glide path.

The approach plate contains information tailored for the particular airport and procedure, incorporating safety, terrain, and obstacle considerations. This ensures that the distance is ideal for the specific approach, accounting for factors such as altitude, descent rates, and operational norms for that approach. While performance data, weather conditions, and aircraft type are certainly important considerations in flight planning and execution, the exact distance from the FAF to the runway is a standardized part of the chart, making it ultimately plate dependent.