When you’re trying to get a board built, the BOM is where projects go to die—especially when one tiny mismatch in manufacturer name, MPN, or stock status holds up the entire flow. In this video I walk through how I build a professional, supplier-ready bill of materials using Altium’s new Bill of Materials Manager (via Altium Develop). I’m using the NVIDIA Jetson AGX Orin carrier board as the demo because it’s packed with parts, and there’s no way I’m manually wrangling that across Mouser, Digi-Key, Arrow, and whoever else. I show you how I download the BOM by supplier (which is honestly ridiculous in the best way), so you can instantly generate a clean CSV for a specific distributor and stop playing Excel-script gymnastics. Then I export a polished template (I like the dual-supplier template) that’s formatted for real-world PCBA handoff—primary and secondary sourcing, pricing/stock columns, and a layout that looks like something you’d actually send to an assembly house. My big takeaway: fix issues up front inside the BOM tool, then re-download—because every back-and-forth email with your PCBA is a day gone, and that’s how production gets held up for weeks.