EUC Engineering has been engaged by an engineering “design and construct” company, working on a large iron ore expansion project, to devise a methodology for establishing the SIL target for a remote isolation system for a 13 km long overland conveyor. The work includes alignment of the methodology with the end user functional safety criteria and standards, as well as establishing a method to evaluate the permissible tasks to be carried out under a remote isolation (versus a conventional isolation). The work includes facilitation of a workshop and preparation of a report to record the findings. Central to the work is consideration of AS/NZS 4024.1603:2019 on prevention of unexpected starting of machinery.