Siemens Aktiengesellschaft

Manfred Lohner

Stefan Rothbauer

Reiner Heilmann

Peter Liggesmeyer

Ariane Sutor

Martin Rothfelder

Oliver Mäckel

IN a method and a device for determining a probability of occurrence that an overall system fulfills a predefined system performance, the overall system is composed of instances of different classes of partial systems, and each class of partial systems has an associated class fault tree. The method has the following steps: (a) calculating (S) an overall performance for each failure combination of the number of non-failed instances within a class; (b) automatic selection (S) of failure combinations, the calculated overall performance of which fulfills the predefined system performance; (c) automatic generation (S) of an overall fault tree based on the class fault trees of partial systems as a function of the selected failure combinations; and (d) evaluating (S) of the generated overall fault tree for calculating the probability of occurrence of a fulfillment of the predefined system performance by the overall system.

Method and device for determining a probability of occurrence by evaluting an overall fault tree

Disclosed is a full error description for a technical system which is described by a system description which can be processed by a computer and stored. The system description contains information on elements available in system and information on the links therebetween. An element error description is determined for each element taken into consideration, using a stored error description which is respectively associated with a reference element. At least one part of the reference elements is grouped into a reference element group and a group error description is determined for the reference elements of a reference element group using a stored group error description which is respectively associated with a reference element group, enabling possible errors of the reference elements of the reference element group to be described. A full error description is determined from the element error descriptions and the group error descriptions, taking into account information on element links.

Method and device for determining a full error description for at least on part of a technical system computer program element and computer-readable storage medium

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Munich, Germany

Manfred Lohner