Kuso sonke isitshalo sokuxuba i-asphalt, ingxenye eyinhloko uhlelo lwayo lokulawula, oluhlanganisa izingxenye ze-hardware ne-software. Umhleli ongezansi uzokuhambisa ekwakhiweni okuningiliziwe kwesistimu yokulawula yesiteshi sokuxuba itiyela.
Into yokuqala esikhuluma ngayo ingxenye yehadiwe. Isekethe yehadiwe ihlanganisa izingxenye eziyinhloko zesekethe kanye ne-PLC. Ukuze kuhlangatshezwane nezidingo zokusebenza zesistimu, i-PLC kufanele ibe nezici zejubane eliphezulu, umsebenzi, isofthiwe enengqondo kanye nokulawula ukuma, ukuze inikeze imisebenzi ehlukahlukene yesitshalo sokuxuba i-asphalt. Ukulawula ukunyakaza kunikeza izimpawu zokulungela.

Okulandelayo, ake sikhulume ngengxenye yesoftware. Isofthiwe yokuhlanganisa iyingxenye ebaluleke kakhulu yayo yonke inqubo yokuklama, okuyisisekelo kakhulu okuwukuchaza imingcele. Ngaphansi kwezimo ezijwayelekile, uhlelo lwesitebhisi sokulawula kanye nohlelo lokususa iphutha kuhlanganiswa ngokwemithetho yokuhlela ye-PLC ekhethiwe, futhi uhlelo olususwe iphutha luhlanganiswe kulo ukuze kuqedelwe ukulungiswa kwesofthiwe.