Publication 1995 Issue No. 2 - February Abstract - Evaluating FTRE's for Dependability Measures in Fault Tolerant Systems
Evaluating FTRE's for Dependability Measures in Fault Tolerant Systems
February 1995 (vol. 44 no. 2)
pp. 275-285
 ASCII Text x Suresh Rai, "Evaluating FTRE's for Dependability Measures in Fault Tolerant Systems," IEEE Transactions on Computers, vol. 44, no. 2, pp. 275-285, February, 1995.
 BibTex x @article{ 10.1109/12.364538,author = {Suresh Rai},title = {Evaluating FTRE's for Dependability Measures in Fault Tolerant Systems},journal ={IEEE Transactions on Computers},volume = {44},number = {2},issn = {0018-9340},year = {1995},pages = {275-285},doi = {http://doi.ieeecomputersociety.org/10.1109/12.364538},publisher = {IEEE Computer Society},address = {Los Alamitos, CA, USA},}
 RefWorks Procite/RefMan/Endnote x TY - JOURJO - IEEE Transactions on ComputersTI - Evaluating FTRE's for Dependability Measures in Fault Tolerant SystemsIS - 2SN - 0018-9340SP275EP285EPD - 275-285A1 - Suresh Rai, PY - 1995VL - 44JA - IEEE Transactions on ComputersER -

Abstract—In order to analyze dependability measures in a fault tolerant system, we generally consider a nonstate space or a state space type model. A fault tree with repeated events (FTRE's) presents an important strategy for the nonstate space model. This paper deals with a conservative assessment to complex fault tree models, henceforth called as CRAFT, to obtain an approximate analysis of the FTRE's. It is a noncutset, direct, bottom-up approach. It uses failure probability or failure rate as input and determines a bound on the probability of occurrence of the $\mbi\left\{TOP\right\}$ event. CRAFT generalizes the concept of a cutting heuristic that obtains the signal probabilities for testability measurement in logic circuits. The method is efficient and solves coherent and noncoherent FTRE's having AND, OR, XOR, and NOT gates. In addition, CRAFT considers $M/N$, priority AND, and two types of functional dependency, namely OR and AND types. Examples such as the $Cm^*$ architecture and a fault-tolerant software based on recovery block concept are used to illustrate the approach. The paper also provides a comparison with approaches such as SHARPE, HARP, and FTC.

Index Terms—Coherent and noncoherent structures, conservative assessment, cutting heuristic, dependability measure, fault tree analysis, fault tolerant system, functional dependency, priority AND, signal probability.

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Citation:
Suresh Rai, "Evaluating FTRE's for Dependability Measures in Fault Tolerant Systems," IEEE Transactions on Computers, vol. 44, no. 2, pp. 275-285, Feb. 1995, doi:10.1109/12.364538