Title :
A graphical language for reliability model generation
Author :
Howell, Sandra V. ; Bavuso, Salvatore J. ; Haley, Pamela J.
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
Abstract :
A graphical interface capability of the hybrid automated reliability predictor (HARP) is described. The graphics-oriented (GO) module provides the user with a graphical language for modeling system failure modes through the selection of various fault tree gates, including sequence dependency gates, or by a Markov chain. With this graphical input language, a fault tree becomes a convenient notation for describing a system. In accounting for any sequence dependencies, HARP converts the fault-tree notation to a complex stochastic process that is reduced to a Markov chain which it can then solve for system reliability. The graphics capability is available for use on an IBM-compatible PC, a Sun and a VAX workstation. The GO module is written in the C programming language and uses the Graphical Kernel System (GKS) standard for graphics implementation. The PC, VAX, and Sun versions of the HARP GO module are currently in beta-testing
Keywords :
engineering graphics; fault tolerant computing; reliability theory; user interfaces; C programming language; GKS; GO module; Graphical Kernel System; HARP; IBM-compatible PC; Markov chain; Sun; VAX; fault tree gates; graphical interface capability; graphics-oriented model; hybrid automated reliability predictor; sequence dependency gates; stochastic process; Computer graphics; Computer interfaces; Fault tolerant systems; Fault trees; NASA; Reliability; Software tools; Stochastic processes; Sun; Workstations;
Conference_Titel :
Reliability and Maintainability Symposium, 1990. Proceedings., Annual
Conference_Location :
Los Angeles, CA
DOI :
10.1109/ARMS.1990.68003
