Los ntawm kev tsim tsev mus rau lub tsev software. Xyoo 1950's Waterfall Development Model tau qhia rau hauv software tsim thiab kev tsim kho. Lub kaw lus yog qhov tseem ceeb ntawm kev tsim khoom lag luam uas, los ntawm qhov tsim nyog, cov lus teb yog yuav tsum tau tsim ua ntej ua haujlwm pib. Thiab, nyob rau hauv lub ntiaj teb no, cov lus teb yog ua rau kev nkag siab! Koj puas tuaj yeem xav txog qhov xwm txheej uas koj txiav txim siab…