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Abstract

This report consists of two parts. The first part analyses uses of functional concepts in the description of physical objects and actions. It is shown that the basic distinction between various definitions of the concept of function can be analysed within a semiotic framework, which leads to an identification of three different types of situations comprising the object, the agent and an intention or a goal. For each of these three situations there is a corresponding meaning of the concept of function. It is also shown that the three functional concepts also apply to descriptions of actions. The results may therefore serve to establish a firmer conceptual basis for the engineering of such systems. The second part presents an analysis method for goal sequences for emergency procedures, which is tested on a case of overvelocity of a turbine pump in an auxiliary feedwater system. The analysis shows how alternating goals interact, and a graphical representation is suggested to represent the difference between higher-level, tactical or strategical goals and operational goals in an emergency situation.

Additional information

Authors: LIND M, Technical University of Denmark, Institute of Automatic Control Systems, Lyngby (DK);NORBY LARSEN M, Technical University of Denmark, Institute of Automatic Control Systems, Lyngby (DK)
Bibliographic Reference: EUR 15705 EN (1994) 33 pp., free of charge
Availability: Available from Joint Research Centre, Publication Department, I-21020 Ispra (Va.) (IT)
Record Number: 199410701 / Last updated on: 1995-03-21
Category: PUBLICATION
Original language: en
Available languages: en