Ngokwesiphiwo lesifundzeko, amathethi, njengeemibuzo emikhoyo esingabo neemibuzo yomsebenzi, bayenza isithunzi esikhonzayo, futhi iimithombo yawo afuneka lokuhlola, ukusebenza nokufakelwa. Izwe eziningi nezindaweni zizoba imithombo yakho yokuthetha ngokwesintuthuko sokusebenza, nokuhlola nokuhlola, kanti ngokwesintuthuko sokusebenza nokuhlola, zazoba imithombo yakho yokuthetha ngokwesintuthuko sokusebenza, nokuhlola nokuhlola. Leshumi lalokhu lizoba luhlola ngeemithombo yobuthi bokhumiso ngokulandelayo neentshaba zakhe. 
1. Amerika
Kwisitisheni, iimithetho zokusebenzisa amacaster ayiqaphelwe ngokupheleleyo yamaNcinci waseMerika (ANSI) kunye neAmerican Society for Testing and Materials (ASTM). Iimithetho zeANSI zikhulula idilesa, amatharike kunye namanjezi okusebenza lokusebenza kweamacaster, uzokusureka usosotho nokuhlola kusetyenzisweni. Lolu hlobo olunye lweASTM ulandelayo kumanjezi, phakathi kwalokhu kulandelwa umoya-wonke, ukugcina amanqaku kunye nokugcina umoya-wohlola. Ngakwesoku, Underwriters Laboratories (UL) yalandelayo amacaster esebenza kumakheli weelektri, ngokubaluleka phakathi kososotho kunye nokugcina ifayela.
2. Umkhonto Wemphakathi Wesibhayi
Iindlela zokubuyisela kwi-Europe yikudibaniswa ngaphakathi nge-CEN (European Committee for Standardization). Izicatshulwa ze-Europe zihloniphe izindawo zokugcina nokuhlola, uzokusukumisa ukususa okungavumelekileyo kwenqanawe yokugcina. EN 12529 yi-standard ephakathi yesiyo lokubuyisela, uhlola i-safety nokuthengiso lwezindlela ezininzi zokubuyisela, phakathi kwezindlela ezintathu nezidinamu. Ngakho, CEN uhamba ngokuphakeme ukuthi isenzo esikhoyo sesibhedlela sasendlela siphumeleyi ukuthi le ndlela asetse amanzi njengoba kukuhlanganiswa kwesikhowe sokuxhumana nokusebenza.
3. Japan
Iindlela zokubala kweJapan zibhekisele ngaphakathi yomkhombithi weJapanese Industrial Standards Committee (JISC). JIS B 4800 yi-standard esikhundleni sokubala kwe-mkhombithi, icovela konke amandla kusukela kudizayini kwi-material okusebenzeka. Amasithando aJapan ayiphi ingxenye yokugcina ukuthi lokuhlola lokulandelana nokuphazamisa umoya wokushintsha kunye nokushintshwa kwesiqephu, futhi asikho ngezinhlobo ezifaneleyo zokuthuthukisa nokuthabatha. Kufuneka uJIS uzame ukuthi ubungakanani nobungako besebe phakathi komsebenzi wesikhephe kunye nokuthuthukiswa.
4. China
Ku-Sayina, iimithetho zeskothweni zihulumeni ngokupheleleyo yilethi leStandardization Administration of China (SAC) kunye neChina Machinery Industry Federation. UGB/T 19625 uyimithetho ophambili esayini ngenxa yokusebenza, amamethods okuthathelwa kunye nokubhala kwezinye izinhlobo zesikotho. Lomithetho ucacisa ukukhetha komathebula eskothweni, kunye nokuphakamisana nokuhlola lokusetyenziswa kunye nokusho kanye nokungaphandle komunye umsebenzi wesiko. Ngokwesiphi, iimithetho zeSayini zingabizwa ngokupheleleyo ukusetshenziswa kokuthiwa kwabo imithetho yesiqalo sasendaweni sokuthiwa ukuyongcibisa uphawuli kunye nokuthuthukisa ukuhlola.
5. Izifundiso Ezine
Amanxiwa angaphambili njenge-Australia, Canada, kunye ne-India yayibutha amandla yakhe ezikhululekileyo. Ngokubanzi, i-Australian standards (AS) zifundzisela ukusolokoza kunye nokuhlola kwezinye zezinto ephakathi kwebutiso lomhla kunye nesikhatho eside; i-Canadian standards (CSA) ifaka umthetho wokususa isiphumo sasendaweni ye-North America. Ukubutha kwesayithi sesayithi se-India siyahlula futhi sisetshenziswa ukuba usuke usenze fokothini nokubutha kwezindlela ezintlaleni zikahle.
Isiphetho
Ngenze lokuhlola ngokukhethelwayo, amacaster ayiqhathaniswa njengephakamisi lokusebenza kwisebe nokugcina isibayeni, zihlukaniswa ngeemithetho ezidingekayo phakathi kwabantu ababangako bethu, ngenxa yomthetho wesifundazwe esingabo. Ukufunda amaphutha okulandelayo kweamacaster kuzo kuhlela izicelo zokusebenzela ukubuyiselwa kumthetho wokususa nokuphucula kunye nezilungiselelo ezikhona eziqinileyo ezikhethekileyo ngokwesiphumo sokususa nokuphucula nokuthiwa kanye nokuthuthukisa umsindo nokulandelana kweemvelo. Kwimvuso yobunzima obunyathelwe, ukuthuthukisa ukuxhumana komthetho weamacaster phakathi kwezilanda lezintsha lizokuthuthukisa ukuhlawulwa nokulandelana kwezilondolozi zezilondolozi zezilonda. Leshumi lenkcane libe lahlalekile ukuthiwe ukuba uhlobo lwamacaster lwesizwe esingabo.