Kuyo yonke isityalo sokuxuba i-asphalt, inxalenye ephambili yinkqubo yayo yokulawula, equka i-hardware kunye nesofthiwe. Ngezantsi, umhleli uya kukusa kuyilo oluneenkcukacha lwenkqubo yolawulo lwesityalo sokuxuba i-asphalt.

Okokuqala, inxalenye ye-hardware ikhankanywe. Isekethe ye-hardware ibandakanya amacandelo esekethe eziphambili kunye ne-PLC. Ukuze kuhlangatyezwane neemfuno zokusebenza kwenkqubo, i-PLC kufuneka ibe neempawu zesantya esiphezulu, isoftware ye-logic kunye nolawulo lokubeka indawo, ukwenzela ukubonelela ngeempawu ezilungele ukulawula isenzo ngasinye sesityalo sokuxuba i-asphalt.
Emva koko makhe sithethe ngenxalenye yesoftware. Ukuqulunqwa kwesoftware yinxalenye ebaluleke kakhulu kuyo yonke inkqubo yoyilo, kwaye inxalenye esisiseko kukuchaza iiparamitha. Ngokubanzi, inkqubo yedayagram ye-ladder ye-ladder kunye ne-debugging program ihlanganiswe ngokwemigaqo yeprogram ye-PLC ekhethiweyo, kwaye inkqubo ehlanjululweyo idibaniswe kuyo ukuze igqibe ukuqulunqwa kwesofthiwe.