Ngwenya, Charles Tony Simphiwe.Sokotshe, Mongezi.2024-12-042024-12-0420222022https://hdl.handle.net/10413/23446Masters Degree. University of KwaZulu-Natal, Durban.Abstract available in PDF.enMaintenance management systems.International standards.Risk management.Engen refinery work process recalibration as an efficient maintenance strategy for oil and gas industries.Thesis