What to Review Before Sending a Plastic Part Out for Quote

Engineers often send designs out for quote assuming the CAD model contains everything a manufacturer needs. In reality, manufacturers need additional details to produce the most accurate quote.

Manufacturers have to evaluate how the part will be produced, what materials are required, how tooling will work, expected production volumes, and whether any additional finishing or assembly steps are involved. Packaging details are also a detail that usually gets pushed to the side.

When that information is missing, the quoting process slows down. Manufacturers may need to follow up with questions, which slows down your process.

Reviewing a few key details before sending a design to a manufacturer helps speed up the quoting process and produces estimates that are more useful for project planning.

1. Confirm the Design Is Ready for Manufacturing

Before requesting a quote, review the CAD model and drawings to make sure they clearly communicate the part’s geometry and requirements.

Manufacturers rely on this information to understand how the part will be produced and what tooling may be required. If critical dimensions, tolerances, or features are unclear, the manufacturer may have to make assumptions that affect the accuracy of the quote.

2. Outline the Part’s Application

Manufacturers also need to understand how the part will be used in the real world. Application details influence both the manufacturing process and the materials selected. Helpful information may include expected environmental conditions, aesthetic requirements, regulatory requirements, and any performance expectations for the finished part.

3. Review Material Requirements

Material selection plays a major role in both performance and cost. In some cases, engineers already have a material specified. In others, the manufacturer may help recommend materials based on the part’s application and performance requirements.

Providing as much information as possible about the desired material properties helps manufacturers evaluate the design more effectively and suggest alternatives if needed. The manufacturer may be able to provide a better solution to the initial material engineering is requesting.

4. Estimate Production Quantities

Expected production volume is one of the most important factors in manufacturing decisions.

Production quantities affect tooling, manufacturing efficiency, MOQs, and cost per part. Providing estimated annual quantities helps manufacturers recommend production strategies and generate more realistic quotes.

5. Identify Finishing Needs

Many plastic parts require additional work after the initial forming process. Secondary operations might include trimming, drilling, printing, or assembly. These steps add time and cost to the manufacturing process, so it is important for manufacturers to understand them when preparing a quote.

6. Files to Include With Your RFQ

In addition to project details, manufacturers need the right files to evaluate the design. Manufacturers prefer receiving both CAD models and supporting drawings. Typical files include:

• 3D CAD files
• 2D drawings that include critical dimensions and tolerances
• Notes identifying key features or functional requirements
• Any available prototypes or reference parts

Providing both the model and detailed drawings helps manufacturers understand the intent of the design and identify any manufacturability concerns before quoting.

How Early Collaboration Improves Your Quote

In addition to requesting a quote, often the most helpful step before fabrication is requesting a design for manufacturability review. An early conversation allows manufacturers to review the design, identify potential manufacturability concerns, and suggest adjustments that simplify production.

These insights often lead to more accurate quotes and smoother transitions into tooling and production. Instead of discovering issues after production has kicked off, teams can address them early and move forward with greater confidence.

When engineers provide clear design data, application context, material expectations, and production estimates, manufacturers can respond with quotes that are faster, more accurate, and more useful for planning production.

If you’re preparing a plastic part for production, an early manufacturability review can help identify potential challenges before they affect tooling or timelines.

The team at ICP works with engineers to evaluate part designs, review materials, and identify opportunities to simplify manufacturing before production begins.

Submit your design to request a DFM review and move your project toward production with greater confidence.

Industrial Custom Products is a one-stop-shop for custom manufacturing and plastic fabrication, including: prototyping and product development, die cutting and dieless knife cutting, thermoforming and vacuum forming, large part thermoforming, CNC plastic routing, fabrication and assembly and drape forming.