Plastic Part Design Support

Optimized Design for Functionality and Sustainability

Plastic Part Design: Early Collaboration is Key for Successful Tool Launches

HubSpot Video

Design for manufacture and assembly (DFMA) is a first, and critically important, step in the plastic part design and plastic injection molding process. In fact, research has shown that 80 percent of the cost of a new product hinges on design and manufacturers are ranking plastics design consultation as a top factor in reducing overall manufacturing costs. Making sure the right design decisions are made early in the product development process can have a substantial impact on the total product cost.

The sharp line that was once drawn between development and production is now blurred with product manufacturers leaning on injection molding design experts to become involved in the process much earlier than ever before.  

“Rosti’s processes and controls are probably the best that I have seen. They know what they are doing and they do it right. I have confidence in them. World-class.”

Design & Release Engineer at a Major Automotive Company

Rosti embraces a four-pronged approach to plastic part production launch:

  • Design for manufacturability / toolability (DMFA)
  • Design for functionality
  • Design for assembly 
  • Design for sustainability                           


Designing a plastic part for manufacturability involves important factors that touch on areas of plastic part design, tooling, material selection and production. When plastic part designers take a collaborative approach to involve mold makers early in the design process, many benefits can be realized.

The result of working with a plastic injection molder early in the part design process includes efficiencies in a number of areas:

  • Faster time to market
  • Cost savings
  • Design, production insights, historical data and intellectual property is maintained from one step to the next
We strive to show our customers the value that could be missed if design, prototype and production are treated as separate processes - rather than integrated into one manufacturing chain.  


Do you need prototype design assistance or design validation before hitting the market?

Creating a prototype is a small step that can save substantial time and expense later.

Let's talk!