Issue link: https://iconnect007.uberflip.com/i/1527952
90 PCB007 MAGAZINE I OCTOBER 2024 As an engineer, I thrive on data, and one of my favorite forms is metrics. However, the one metric that has always challenged me is pro- ducibility. I define this as more than just pass- ing a DRC in CAM, but the entire envelope of "simplicity of design," "suitability for test," and many more. Yet, producibility seemed to be different for different engineers and we had no clear way to establish and define producibil- ity other than opinion. When I worked at HP, the company invested in a methodology called design for manufacturing and assembly using the GE/Hitachi Methodology and Dewhurst- Producibility and Other Pseudo-metrics Boothroyd soware 1 . Finally, I had a method- ology that created a producibility score. Metrics Metrics are data and statistically backed measures, such as wiring demand (Wd) 2 . ese measures can be density, first pass yield (FPY ) 2 , connectivity, or in this context, pro- ducibility. ese metrics are the basis for pre- dicting and planning a printed circuit design. CAD files and drawings do not always provide the necessary data as illustrated in the Esher drawing (Figure 1) produced on a notable 3D Happy's Tech Talk #34 by Happy Holden, I-CONNECT007 Figure 1: CAD drawings do not always provide producibility.