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SEPTEMBER 2025 I DESIGN007 MAGAZINE 39 Progressive Accuracy Simulation and verification require more effort and can be done by fewer people as the simulation gets more accurate and complicated. On the left side of Figure 3, simulations are designed to quickly identify numerous failures and gradually move toward more complex models, ensuring the design's function- ality. The right side represents the most intricate models and simulations, aiming for the highest accuracy. These simu- lations typically require experts. Early-stage simulations demand less expertise, allowing more engineers to analyze and provide feedback without the complexities of expert-level analysis. The goal is to take the simple problems off the table quickly, so that by the time F i g u re 3 : M o re ef fo r t , p e r fo r m e d by fewe r p e o p l e, i s t h e n a m e of t h e g a m e i n ve r i f i c at i o n . ▼ F i g u re 4 : Two i n c o r re ct l y ro u te d t ra c e s a re f l a g g e d , o n e fo r p a s s i n g to o c l o s e to a v i a , a n d t h e ot h e r fo r c ro s s i n g a s p l i t i n t h e ret u r n p l a n e. ▼ detailed simulation is deployed, only the toughest (and hope- fully fewest) problems remain. Sweeping Simple Problems Off the Table By the time system designers get a completed board to review, management wants to push it to production immediately. To do that, they need to get as many problems as possible resolved in a very short time. Today's design rule checking tools include rules that find problems associated with mul- tiple design domains, including analog, signal integrity, power integrity, electromagnetic inter- ference, and electrical safety. No model? No problem! Once the design rule check has been completed, we can run a compliance analysis