Verification and Validation of Complex Systems: Human Factors Issues

Author(s):  
John A. Wise ◽  
V. David Hopkin ◽  
Richard S. Gibson ◽  
Paul Stager ◽  
William F. Stubler

The issue of verifying and validating complex systems based on human factors criteria is becoming widely recognized. The need has become particularity significant with the development on the highly automated systems currently being developed for the new air traffic control systems around the world. This panel discusses several issues that have evolved from an international working meeting on the topic.

Author(s):  
P. G. Berdnik ◽  
◽  
O. I. Tymochko ◽  
А. V. Samokish ◽  
◽  
...  

This article provides an overview of the methods used in practice to assess the risks that arise in the process of designing automated air traffic control systems. The classification of risks and possible negative consequences of risks are determined. Based on this analysis, it is concluded that in order to increase the success of the design process, risk management tools are needed, including the accumulation of risk management experience for its further use. To achieve this goal, a risk assessment model for the development of automated air traffic control systems based on explicit and implicit expertise, including an analysis of situations in which risk processing is required. With the emergence of fundamentally new automated systems, the problem of risk assessment of design as a strategic direction of automation and intellectualization of relevant processes in various fields of science and technology. Note that in this context, the concept of automated systems includes such concepts as "complex phenomena", "complex technological processes", "complex systems", including the person himself, which is considered as an element responsible for the generation, storage and use of knowledge. The peculiarity of modern automated systems is that they operate in conditions given, as a rule, by a finite set of quantitative and non-quantitative (verbal) variables and corresponding constraints. At the same time, many risk assessment tasks are formed and described both verbally in the professional language of this field of knowledge, and formally using different classes of models. The proposed method of risk assessment of the development of ACS by air traffic is based on production rules, which provides the opportunity to accumulate and use the experience of overcoming the risks of the project, and thus increases the success of the project.


1979 ◽  
Vol 23 (1) ◽  
pp. 26-29
Author(s):  
Earl L. Wiener

Several spectacular aircraft collisions, one on the ground at Tenerife, Canary Islands, and mid-airs at Memphis and San Diego, have brought into question the adequacy of present air traffic control systems. Following the San Diego collision in September 1977, between an air carrier B-727 and a Cessna 172, there has been a hue and cry to “do something”. Among the many proposed “solutions” have been tighter restrictions on VFR aircraft, stricter control of mixed IFR and VFR traffic, development of airborn collision avoidance systems, and creation of reliever airports. There has been little recognition of the basic problems of human factors in aircraft collisions. This paper examines collisions from a human factors perspective, seeing them primarily as “system-induced errors” resulting from control systems that stress regulation and airspace allocation, and do not properly consider the human operator. To avoid future accidents, system designers must consider such topics as basic assumptions in air traffic control, mixed IFR and VFR navigation, pilot-controller and controller-controller communications, extra-cockpit vision, workload of pilots and controllers, proposed regulations, and instrumentation.


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