Yin amfani da gudanarwa da sarrafa ma'aikaci, injin, kayan aiki, hanya, muhalli da aunawa zuwa aiki mai amfani, WRN ta kafa cikakken tsari na tsarin kula da inganci, yana rayar da samfuran kere kere da gina ingantaccen kamfani.
TARBIYYAR TSARO
TABBATAR DA SAYARWA
CIBIYOYIN GWADA NA SANA'A
Green fim aikin
Gwajin gwaji
Ma'auni
Gwajin gwaji
Tsarkakewar iska
Gwajin gwaji
Netarancin net net
Gwajin gwaji
Samfurin fasali
Gwajin gwaji
Kayan abu
Gwajin gwaji