1. Hais los ntawm
Qhov no yog qhov ua kom pom tseeb dua ntxiv, cov neeg tsim khoom pwm zoo, lawv cov lus hais kom ntxaws, thiab yuav ua raws koj cov khoom lag luam thiab qhov loj ntawm cov pwm qhov tseem ceeb thiab cov pwm puag, xaiv cov khoom siv, tonnage ntawm cov khoom siv ntau lawm, zoo thiab cov kev pabcuam tom qab muag, thiab lwm yam. Tus nqi raug hais tawm yog tsim nyog, muaj nws cov qauv tsim tawm tus nqi tsim khoom.
2. Kev Tsim Khoom
Thaum lub chaw tsim tshuaj pwm tsim pwm, nws muaj nws cov phiaj xwm pwm txheej txheem, xws li lub voj voog tsim, cov khoom siv ua khoom siv, kev ua lub voj voog, cov voj voog coj mus kuaj, thiab lwm yam. Kev txhaj tshuaj molding cov txheej txheem tswj yuav siv lub luag haujlwm tseem ceeb hauv tag nrho kev tsim khoom.
3. Cov Khoom Siv thiab thev Naus Laus Zis
Cov txheej txheem ua khoom siv cuam tshuam ncaj qha rau qhov zoo ntawm cov pwm. Yog tias cov khoom ua tiav tsis tiav, kev ua haujlwm tsawg dua, pwm yuav tsis zoo. Lwm tus taw tes yog cov tshuab txhaj tshuaj molding tshuab. Lub tshuab ua lag luam kuj suav nrog qib theem tsim. Yog hais tias tus qauv ntawm lub pwm tsis tsim nyog, cov kev ua hauj lwm zoo thiab kev ua haujlwm zoo tsis zoo dua. 
4. Kev ntseeg siab
Qee cov tshuab pwm ua cov khoom siv pwm pheej yig hauv kev tsim khoom, tab sis cov lus hais yog ua raws cov khoom zoo dua. Cov neeg yuav khoom xav tias cov nqe lus zoo heev raws li cov khoom siv zoo, tab sis lawv tsis paub tias lub chaw tsim khoom yuav siv cov khoom pheej yig dua. Qhov no yog ntxiab, yog li ntawd, kev pabcuam lub neej ntawm cov pwm yuav tsis xav tau, kuj tseem muaj kab nrib pleb, tawg thiab lwm yam teeb meem. Feem ntau hais lus, cov tuam txhab ua pwm zoo yuav muab cov ntawv qhia tom qab cov pwm ua tas. Daim ntawv tshaj tawm cov ntaub ntawv no yog muab los ntawm cov kws tsim khoom tsim thiab muaj cov txiaj ntsig raug cai.
5. tom qab-muag kev pabcuam
Cov pwm tsim khoom lag luam tom qab muag yog qhov tseem ceeb heev vim tias cov neeg ua haujlwm ua haujlwm tsis raug yog kev tsis tuaj yeem thaum pwm siv, xav tau pwm chaw tsim khoom muab cov kev txhawb nqa, txawm tias rov qab mus rau lub Hoobkas rau kev kho. Yog tias lub chaw tsim khoom lag luam pwm tsis muab qee qhov kev pab, qhov ntawd yuav ua rau cov qhua tuaj noj mov cov khoom ua haujlwm nres.
Tx ລວມ, nws yog ib qho tseem ceeb heev los xaiv tus zoo pwm tsim khoom lag luam, vim tias lawv tsis tsuas yog tuaj yeem muab cov pwm pwm txaus siab rau koj tab sis kuj tuaj yeem ua rau tom qab-muag tau yooj yim. Thaum cov neeg lag luam ntsib teeb meem ntau lawm, lawv kuj tuaj yeem sab laj cov kws tsim kev lag luam pwm, lawv yuav muab cov lus qhia zoo rau cov neeg siv khoom ntau yam xws li kev tsim, tsim khoom, daws teeb meem thiab lwm yam, tuaj yeem txuag nqi, txhim kho kev ua tau zoo, cia cov neeg tuaj muag cov khoom lag luam zoo dua lub koob npe nrov thiab nqe thaum lub sijhawm siv cov neeg siv khoom. Thiab hais tias lub voj voog lag luam zoo uas kuv tau tos ntsoov rau hauv pwm kev tsim kev lag luam.