Send a full bill of materials to a quick-turn manufacturing portal and watch what happens. The machined parts that fit the process window come back priced in minutes. The cast part, the molded housing, the weldment, and the parts needing finishing or assembly come back with no quote. Those parts aren’t exotic. The platform just can’t make them.
So the BOM sourcing problem is yours again. Five vendors instead of one. Five POs, five lead times, five quality systems, five people to chase when something slips. You split up your own project just to get it built.
Why quoting a BOM line by line fails
The parts on a BOM aren’t independent. They mate, stack tolerances, and arrive at an assembly line together, or don’t arrive at all. Quoting them in isolation misses that. The vendor machining your baseplate doesn’t know the molded cover is running three weeks behind and has no reason to care. We cover the cost side of that in the hidden cost of splitting a BOM across multiple portals.
Process transitions make it worse. Quick-turn parts and production parts are different problems even when the geometry looks the same. A design that prints fine in additive often won’t survive the move to a mold without changes, and pricing between the two doesn’t translate. We’ve seen programs where bridge parts and production parts needed different approaches. A platform built around a single process window can handle one phase or the other, but rarely both on one timeline under one quote. See prototype to production for when that switch makes sense.
What full-BOM sourcing looks like
Precision Expedited quotes the whole BOM. That’s what a manufacturing sourcing partner is for. Our vetted vendor network covers CNC machining + sheet metal fabrication + injection molding + additive manufacturing + finishing + assembly, so every line item gets matched to a shop proven in that process. Our engineers review the full package before anything goes to quote, including handoffs between processes, so an additive-to-molding transition gets flagged at the drawing stage rather than at tooling.
You get one number, one timeline, and one point of contact from RFQ to delivery. Parts are inspected in San Clemente before they ship, under PE’s ISO 9001:2015, AS9100D Compliant, and ITAR Registered quality system. When something moves, a single call reaches the person managing all of it. Our post on where multi-process builds go wrong shows what that person is watching for.
How to get a full BOM quoted
Send the whole package. Include the BOM with quantities, prints or models for every line item, quantities per phase if you’re bridging into production, and your target dates. Flag anything already sourced. The more complete the package, the faster a real person can review it and come back with a real number.
Frequently asked questions
Portals price the processes their automation supports, usually machining and some printing. Castings, molded parts, weldments, finishing, and assembly often fall outside that window and come back unquoted.
The BOM with quantities, a print or model for every line item, finish and inspection requirements, quantities per phase, target dates, and a note on anything already sourced.
Line prices may be similar or slightly higher. Total cost is often lower once you count the coordination time, mismatched parts, and staggered deliveries that come with five separate vendors.
