Pickup Laura, Wilson John R, Norris Beverley J, Mitchell Lucy, Morrisroe Ged
Centre for Rail Human Factors, Institute for Occupational Ergonomics, University of Nottingham, Nottingham NG7 2RD, UK.
Appl Ergon. 2005 Nov;36(6):681-93. doi: 10.1016/j.apergo.2005.05.004. Epub 2005 Sep 2.
Network Rail, who own the railway infrastructure in the UK, have been interested in the assessment of mental workload (MWL) of signallers and control staff for some years. A new model of MWL has been proposed within which to develop a suite of new MWL analytical and empirical assessment tools. One of these is the Integrated Workload Scale (IWS), developed and tested for signallers. This paper describes the development of the IWS and its subsequent testing within two full-scale simulator trials with an NX (entry/exit) panel and an Integrated Electrical Control Centre (IECC) system, and then in the field at signal boxes. The IWS has proven to be a valuable measure of individually experienced peaks and troughs in workload over a period of time or within a particular set of scenarios. It is acceptable to signallers and maps well onto assessments of expected workload on the basis of timeline analysis and subject matter expert commentaries.
英国铁路基础设施的所有者英国铁路网公司（Network Rail）多年来一直关注对信号员和控制人员的心理负荷（MWL）评估。现已提出一种新的心理负荷模型，在此模型的基础上开发一套新的心理负荷分析和实证评估工具。其中之一是为信号员开发并测试的综合工作负荷量表（IWS）。本文描述了IWS的开发过程，以及随后在两次全尺寸模拟器试验中对其进行的测试，这两次试验分别使用了NX（进出）面板和综合电气控制中心（IECC）系统，然后又在信号楼现场进行了测试。IWS已被证明是衡量一段时间内或特定一组场景中个人所经历的工作量高峰和低谷的宝贵指标。信号员们认可该量表，并且它与基于时间线分析和主题专家评论得出的预期工作量评估结果吻合度很高。
