Kev tsim khoob rau kev tsim khoob yog qhov kev tsim nyog uas muaj nyob rau hauv kev tsim khoob uas yooj yim los tsim, muaj feem xwm, thiab zoo saum npoo. Nws txwv nrog lus nug xws li kev tshem tshem ntawm lub thickness kom tsis txhob muaj kev kaw, sau cov angles rau kev tshem tshem yooj yim, thiab siv cov ribs thiab gussets rau kev nyab xeeb tsis muaj ntau dua. Kev xaiv khoom ntawv—ntawm cov khoom siv plastics xws li polyethylene mus rau cov khoom siv polymers xws li polycarbonate—muaj kev pheej rau kev tsim khoob raws li cov ntaub ntawv xws li kev tiv thaiv, kev nyab xeeb hauv kaw, thiab nqi. Kev tsim khoob rau kev ncaws yog qhov tseem ceeb los saib xyuas kev sib tham thiab kom meej meej cov ntsiab lus, nrog rau cov kev xaiv xws li edge gates lossis hot tips uas raug xaiv rau daim ntawv geometry. Cov software simulation pab saib xyuas kev sib tham, kev lag, thiab cov chaw stress, txhawj xeeb rau kev hloov pauv. Cov kev siv hauv kev siv tau ntau yam xws li cov khoom siv hauv tsev mus rau cov khoom siv hauv kev kho mob, uas cov ntaub ntawv xws li biocompatibility thiab kev tiv thaiv yog qhov tseem ceeb. Cov principles rau kev tsim khoob (DFM) pab tiv thaiv kev nyab xeeb, kom meej meej cov ntaub ntawv, thiab kev raug zoo nrog kev tsim khoob kom kom meej meej nqi thiab sijhawm. Cov ntaub ntawv tshaj tawm, xws li kev siv cov khoom siv recycled thiab kev tsim khoob rau kev tshem tshem, yog qhov tseem ceeb dua. Los ntawm kev nco nrog rau cov standards hauv plhaav thiab kev siv prototyping, cov neeg tsim khoob txhawj xeeb tias cov khoom siv plastic tuaj yeem dhau kev ua haujlwm, kev nyab xeeb, thiab cov chaw tshaj tawm hauv cov chaw tshaj tawm thiab cov chaw ua haujlwm.