Intsimbi ejingisiweyo eshushu isetyenziswa ngokubanzi kwiindawo apho ungqinisiso lomhlwa lungabalulekanga.Kukho iinkqubo ezivumela amashiti entsimbi ashushu aqengqelekayo ukuthintela umhlwa ngokunjalo.Le nkqubo ibizwa ngokuba yi-HRP&O - Ishushu igotyiwe ifakwe i-oyile.