In domains such as nuclear power, industrial process control, and space shuttle mission control, there is increased interest in reducing personnel during nominal operations. An essential element in maintaining safe operations in high risk environments with this 'on-call' organizational architecture is to understand how to bring called-in practitioners up to speed quickly during escalating situations. Targeted field observations were conducted to investigate what it means to update a supervisory controller on the status of a continuous, anomaly-driven process in a complex, distributed environment. Sixteen shift changes, or handovers, at the NASA Johnson Space Center were observed during the STS-76 Space Shuttle mission. The findings from this observational study highlight the importance of prior knowledge in the updates and demonstrate how missing updates can leave flight controllers vulnerable to being unprepared. Implications for mitigating risk in the transition to 'on-call' architectures are discussed.

中文翻译：

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航天飞机任务控制中的班次变更，更新和呼叫架构。

在核电，工业过程控制和航天飞机任务控制等领域，人们对减少标称运行期间的人员的兴趣日益浓厚。通过这种“随时待命”的组织架构，在高风险环境中维持安全操作的基本要素是了解如何在不断升级的情况下迅速提高被召唤的从业人员的速度。进行了有针对性的现场观察，以调查在复杂的分布式环境中更新连续不断的异常驱动过程状态的监督控制器意味着什么。在执行STS-76航天飞机任务期间，观察到NASA约翰逊航天中心发生了16个班次变更或移交。这项观察性研究的结果突出了更新中的先验知识的重要性，并说明了缺少的更新如何使飞行控制器容易遭受准备不足的攻击。讨论了减轻向“通话中”架构过渡过程中的风险的含义。