Sourcing
Stop Emailing 10 Machine Shops for the Same Quote: A Smarter Way to Source Custom Parts
The short answer
Sourcing custom parts is time-consuming because every RFQ is different and every shop needs the same information — geometry, material, quantity, tolerances, finish and delivery — before it can quote. When that information is incomplete or inconsistent between quotes, comparing suppliers becomes a second job. Better RFQs and a single sourcing workflow reduce the coordination cost on both sides: customers reach shops with matching capabilities faster, and shops receive requests that are complete enough to price.
Why traditional sourcing takes so much effort
Custom manufacturing isn't like purchasing a standard product from an online store. Every RFQ is different. A shop needs to understand the part's geometry, material, quantity, tolerances, finish and delivery requirements before it can provide a meaningful quote.
If that information is incomplete, the shop has to ask questions. If the shop doesn't have the right equipment, the customer has to find another supplier and start the process again. For a project involving 10 different components, the number of emails and conversations can quickly multiply.
And when quotes arrive in different formats, comparing them becomes another challenge. One supplier may quote the part only. Another may include finishing and shipping. A third may offer a lower price but a much longer lead time. Without a consistent way to evaluate the proposals, the customer has to spend additional time making sense of the differences.
A manufacturing RFQ needs more than a CAD file
A well-prepared request for quotation should communicate the information a shop needs to evaluate the job. See how to write an RFQ for the full checklist.
3D CAD model or engineering drawing. A STEP file, compatible CAD model or dimensioned drawing that communicates the required geometry.
Material and specifications. The alloy, grade, material condition or other applicable material requirements. Details on when the certification path matters are in material certifications explained.
Quantity. The number of units required, including multiple quantity breaks if you are comparing production options.
Tolerances and finish. Critical dimensions, surface finish, coatings and other requirements that affect manufacturing. The arithmetic for which dimensions earn a tight tolerance is in how to specify tolerances.
Delivery requirements. The required delivery date, shipping destination and any relevant packaging or inspection requirements.
Not every project needs a complete engineering drawing package. But the more clearly a customer communicates the requirements, the less uncertainty a manufacturer has to resolve before quoting.
Compare the complete manufacturing proposal
Price matters, but it's only one part of a manufacturing decision. Suppose you receive two quotes for a prototype. The first is $300 and has a three-week lead time. The second is $375 and can deliver in one week.
If the prototype is needed for a scheduled product test, the additional cost might be justified by the shorter lead time. For another project, the lower price might be more important than the delivery speed.
Customers should evaluate quotes based on the requirements that matter for their project, including price, delivery, material, process and quality expectations. A structured sourcing process makes those differences easier to identify. See landed cost hardware for how to compare complete offers instead of unit prices.
Manufacturing procurement should work for small companies too
Large manufacturers often have established supplier relationships, purchasing departments and procurement systems. A two-person hardware startup doesn't have those resources. The founders may be responsible for designing the product, finding suppliers, reviewing quotes and managing delivery — all while trying to build a business.
Making manufacturing sourcing more accessible can help smaller companies spend less time coordinating suppliers and more time developing products. It also creates an opportunity for independent manufacturing shops to reach customers beyond their existing sales networks.