Subassembly Composer for Updated earthworks

[Endalk]

Dear Autodesk community i need your help in the following matters: 

I'm reaching out to seek your expertise on a specific matter. I'm looking for guidance on how to develop an intelligent subassembly that can accurately identify the boundaries of an embankment, even when the field survey data is incomplete. I've come across a video link on this topic, but unfortunately, it's not very clear. I believe your insight and knowledge could greatly assist me in understanding this concept better. The video link is: https://www.youtube.com/watch?v=Ldfjk3cl-DI&t=1531s Your help on this matter would be greatly appreciated. Thank you in advance for your assistance. Best regards, [Endalk]