Nyob hauv kev tsim kho tsham mus, kev kuab yuav tsis yog qhov kev pab thaum muaj kev tsim kho—nó yog qhov kev ua zauv tseemceeb uas txiav txim siab txog lub tog raj ntawm qhov ntaub, daim duab, thiab nqi tshuaj nyob hauv zaj koom. Kev sau ua kev xaiv tsham mus tshiab yog qhov tseemceeb heev, vim nws txiav txim siab ntau rau lub taub yod zoo thiab daim duab zoo. Yog tshwm sim los ntawm kev kuab yuav meej meej ces tsham mus tuaj yeem muaj cov cua sov sib xws (cua sov), kom tsoom tawm cov teeb meem xws li cov kab ntsug tsis sib xws lossis kab chob. Qhov no pheej hmoo kom cov ntaub muaj kev nyiam zoo sib xws, kev nyiam zoo siab dua, thiab kev ntxuav sib xws. Qhov kev nyiam zoo no pheej hmoo kom tsawg cov ntaub tsis zoo, ntau dua cov ntaub zoo, thiab ntxim kho ntau dua tus nqi. Nws kuj pab ntxim kho kev laj thawj nyob hauv zaj koom, kom pom tau cov kev txiav txim siab tseem ceeb nyob hauv txoj kev siv sib txawv—ntawm qhov chaw nyiaj loj mus rau cov khoom siv hluas thiab cov chaw nres tseg. Vim li no, kev xaiv kev xaiv tsham mus professional yog qhov kev sau ua kev tseem ceeb rau lub taub yod zoo, kev tsim kho meej meej, thiab lub npe tseem ceeb.