Risk indicator indexing matrix-based aeronautic equipment software importance grading method

Abstract

The invention belongs to the field of software safety engineering of aeronautic equipment complex software engineering, and discloses a risk indicator indexing matrix-based aeronautic equipment software importance grading method. Through combining characteristics of domestic aeronautic engineering and considering operability of practical engineering application, the risk indicator indexing matrix-based aeronautic equipment software importance grading method is put forward; and according to the method, two factors in are considered when system risk analysis is carried out: a system risk severity grade and a system risk software control grade. Risk importance is considered from two aspects: influence on system safety (casualties, equipment damage and environment destroy), and influence on mission functions (flight missions and operational missions), so as to provide basis for aeronautic equipment mission system software importance grading. The factor of risk occurrence possibility whichis difficult to calculate or assessment in engineering is not considered, so that the practicability and operability of engineering application are improved.

Description

Technical field [0001] The invention belongs to the field of software safety engineering of complex software engineering of aviation equipment, and invents a method for classifying software importance levels based on a risk index index matrix. Background technique [0002] With the rapid upgrading of aviation equipment, the role of airborne software in aviation equipment is becoming more and more important, and its scale and importance are showing a sharp upward trend. The scale of on-board software for the new generation of combat aircraft will increase substantially. For example: F-35 airborne software development scale exceeds 8 million lines of source code, F-22 airborne software development scale exceeds 2 million lines of source code, while the early third-generation airborne software development scale is only hundreds of thousands of lines of source code . On the other hand, in terms of function realization, the proportion of new-generation combat aircraft software ...

AI Technical Summary

Problems solved by technology

[0007] At present, there are still some deficiencies in the classification of software importance levels that have been implemented in China: the division of software importance levels often relies on experience and intuition, and is relatively subjective and arbitrary; there is a lack of intuitive, concise, effective, and operable software importance Degree grading implementation method; software importance grading considers a single factor, only pays attention to the consequences of danger, and does not consider the degree of control of the software on the system, etc.

GJB / Z 102A considers the possibility of danger when analyzing danger, but in actual engineering applications, the possibility of danger caused by software is difficult to calculate or estimate, which makes this method in practical application There is a problem with the promotion

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