Chris W. Johnson

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Until the 1980s, human reliability analysis focused upon individual erroneous actions. More recently, attention has shifted to the managerial and organizational contexts that create the latent conditions for such failures. Unfortunately, these developments have had little impact upon many industries. The problems of technology transfer are less due to(More)
involving the application of formal notations to analyse accident reports has shown that the quality of these accident reports is poor, so much so that their conclusions can be misleading. The proposed solution has been to use formal notations in combination with traditional analysis to produce a report, the conclusions of which can be veriied by formal(More)
Accident reports provide important insights into the causes and contributory factors leading to particular adverse events. In contrast, this paper provides an analysis that extends across the findings presented over ten years investigations into maritime accidents by both the US National Transportation Safety Board (NTSB) and Canadian Transportation Safety(More)
This paper proposes a method for analysing what are called organisational accidents. The first step of the method involves using Reason’s model of organisational failures. This provides heuristic guidance in identifying both the active and latent conditions that lead to major failures. The second step involves applying formal methods to support a detailed(More)
Satellites now form a core component for space based systems such as GPS and GLONAS which provide location and timing information for a variety of uses. Such satellites are designed to operate in-orbit and have lifetimes of 10 years or more. Reliability, availability and maintainability (RAM) analysis of these systems has been indispensable in the design(More)