Sidney W. A. Dekker

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Recent incidents have shown that the production of takeoff speeds is an activity vulnerable to miscalculations with a potential for disastrous outcomes. The aim of this paper is to analyze the calculation of the takeoff speeds in a modern airline cockpit as a distributed cognitive activity in order to identify possible vulnerabilities in this process. We(More)
Building on the enormous success of the 2007 original, Dekker revises, enhances and expands his view of just culture for this second edition, additionally tackling the key issue of how justice is created inside of organizations. The goal remains the same: to create an environment where learning and accountability are fairly and constructively balanced. The(More)
OBJECTIVE This paper analyzes some of the problems with error counting as well as the difficulty of proposing viable alternatives. BACKGROUND Counting and tabulating negatives (e.g., errors) are currently popular ways to measure and help improve safety in a variety of domains. They uphold an illusion of rationality and control but may offer neither real(More)
a special look at contextual enquiry as a putatively (and indeed potentially) superior way of giving end users a serious say in the procurement process of complex cogni-tive systems. " End user " Human-centered systems result when software engineers or developers give attention to the orientations, expectations, and understandings of the people who will be(More)
Future air traf®c management architectures propose to give aircraft more ¯ight path autonomy and turn the air traf®c controller into a manager of exceptions. This article reports on one experiment in a series of studies that empirically explored the cognitive work underlying management by exception in air traf®c control. Active practitioners (controllers,(More)
PROBLEM How can human contributions to accidents be reconstructed? Investigators can easily take the position a of retrospective outsider, looking back on a sequence of events that seems to lead to an inevitable outcome, and pointing out where people went wrong. This does not explain much, however, and may not help prevent recurrence. METHOD AND RESULTS(More)