The hybrid method combined STPA and SLIM to assess the reliability of the human interaction system to the emergency shutdown system of LNG ship-to-ship bunkering

By introducing autonomous or software-controlled systems, human operators are increasingly required to perform cognitive-intensive tasks in addition existing labour-intensive tasks. As a result, it will be more difficult identify roles future complex systems with traditional approaches such as hierarchical task analysis used the conventional HRA. This paper proposes novel systematic approach for reliability assessment better understand activities systems. The proposed framework is hybrid method combining System Theoretic Process Analysis (STPA) and Success Likelihood Index Method (SLIM) assess system reliability. STPA adopted analyse interaction relationship between different components. primary purpose of find that affect risk human-machine Then identified evaluated quantified by SLIM probability error. block diagram represents derived error probabilities entire probabilistic assessment. Furthermore, study alternations comparing three configurations. Results demonstrate importance performance where humans, machines, software interact.