Issue link: https://iconnect007.uberflip.com/i/1428512
54 PCB007 MAGAZINE I NOVEMBER 2021 products are shipped to the customer. Tradi- tional DFT tools usually work only from the layout stage, which is too late in the whole pro- cess. Design data must be analyzed at the ear- liest stage possible in the product life cycle by importing schematic design data. Electrical DFT rules violations should be identified and rectified prior to commitment to board layout, to prevent costly design re- spins. ese rules can include standard and customer-specific checks relating to company requirements. With a centralized knowledge database, the same problems will never be repeated. Test point requirements must also be identi- fied pre-layout, during the schematic capture stage. is reduces the need for unnecessary test access, saving on PCB real estate, particu- larly on high density boards. e test strategy needs to be simulated, including any combina- tion of inspection and test machines, deliver- ing the highest test coverage. is unique com- Figure 3: Electrical DFT and test point requirements. Figure 4: Mechanical accessibility/DFT.