Accident precursors : pro-active identification of safety by P.M.W. Körvers.

By P.M.W. Körvers.

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4 Research strategies and methods The choice of the most appropriate strategy for the research topic under investigation is one of the most important choices when designing research. Different methods of collecting and analysing empirical evidence have their own advantages and disadvantages. Yin (Yin, 1994) discusses three different conditions that distinguish which research strategy is most suitable. First, the type of research question posed has to be known. Secondly, the extent of control an investigator has over actual behavioural events has to be retrieved.

It is known that failures or deviations in normal operations are present prior to, and are directly related with, an accident. From hindsight analysis as reported in FACTS, the failures or deviations as well as the accident trajectory or causal path, of 70 accidents are known. To derive the risk coverage area these deviations, are placed in the risk matrix. The only deviations taken into account are those which occur in the operational process and are part of the accident trajectory or causal path prior to the critical events as described in FACTS.

34 maintenance / cleaning 26% operation 55% transhipment 13% storage 6% Figure 13 Site ‘mode of operation’ at the moment of accident for investigated accidents. The next sub-Section will use this collection of accidents to identify the events present in recent accident trajectories. , it is known that failures or deviations in normal operations are present prior to, and are directly related with, an accident. From hindsight analysis as reported in FACTS, the failures or deviations as well as the accident trajectory or causal path, of 70 accidents are known.

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