ABSTRACT
A case study is presented concerning the human factors and human reliability aspects of the Integrated Electronic Control Centre (IECC) system. This system is currently being introduced into some power signal boxes in the UK by British Rail. The IECC system involves the signalling of trains using visual display units (VDUs) and a "trackerball" control. This represents a significant departure from existing equipment in power boxes. Given the critical nature of the task of signalling trains potential operational problems needed to be identified and rectified in advance of its implementation.
This paper describes the use of available methods for identifying areas where operational difficulties may arise in routine and non-routine situations. Each method is illustrated using the IECC system as a case study and possible solutions to the problems identified are suggested.
