Design for Manufacturability

How early design decisions impact cost, lead time, and yield
Today, we are expanding my very first blogpost from 2020 and discussing the concept of Design for Manufacturability (DFM). In precision optics, performance often takes center stage during the design phase; however, how an optic is specified and its manufacturability is just as important as how it performs on paper. Having more insight on DFM bridges the gap between concept and production, ensuring that optical components can be manufactured efficiently, consistently, and at scale without sacrificing performance.  

What Design for Manufacturability Really Means
Design for Manufacturability in precision optics is the practice of considering manufacturing constraints early in the design process. This includes material selection, geometry, tolerances, surface requirements, and coatings. When these factors are aligned with proven manufacturing processes, production becomes more predictable and cost-effective. Now, how can an engineer or procurement professional know about manufacturing constraints? Well, that is the whole point of this blog.  

Collaboration is key
When optical designers, engineers, and manufacturers work together early, potential challenges can be identified and addressed before they become costly problems. This collaborative approach often leads to design refinements that improve manufacturability without compromising system performance. 

Early design decisions shape cost
Cost in optical manufacturing is often determined long before the first part is produced. Extremely tight tolerances, complex geometries, or uncommon materials can dramatically increase fabrication and inspection time. 

By engaging manufacturing experts early, designers can often relax non-critical tolerances, simplify features, or select alternative materials that achieve the same optical performance at a lower cost. I have discussed over specifications before, and I understand that you want the best possible optics; however, small adjustments at the design stage can lead to significant savings over the life of a program. For procurement teams sourcing precision optics, design decisions made early in a program often determine whether a project stays on budget and on schedule or becomes a recurring challenge. 

Lead time is influenced at the drawing stage
Lead time is another area heavily impacted by early design choices. Custom tooling, specialized polishing processes, or limited material availability can add weeks or months to a project timeline. I have had customers design a system based on a legacy specialty glass only to find out it would be months before that material is readily available.  

Designs that align with standard manufacturing processes and utilize readily available materials move through production more efficiently. Clear drawings, realistic tolerances, and well-defined inspection criteria also reduce back-and-forth during fabrication, keeping schedules on track. 

Want to learn even more about DFM, head over to part one here. As always feel free to reach out to discuss any prints or upcoming project that you have.