For an example of assessing elements outside the scope of the NAS change in question, consider the following: A panel of stakeholders and Subject Matter Experts (see Section 5.1.1) is tasked with assessing the risk of changing the required longitudinal separation from 3 nautical miles to 2.5 nautical miles on the final approach course between 10 and 20 nautical miles at XYZ Airport. The panel does not limit the description of the environment to the final approach course at XYZ Airport; instead it also considers hazards involved with allowing 2.5 nautical miles’ separation on the base and downwind legs. By considering these additional legs, the panel has failed to properly bound its analysis. 

