Issue No.06 - June (1980 vol.29)
J.F. Meyer , Department of Electrical and Computer Engineering (Program in Computer, Information, and Control Engineering) and the Department of Computer and Communication Sciences, University of Michigan
Performability modeling and evaluation methods are applied to the SIFT computer in the computational environment of an air transport mission. User-visible performance of the "total system" (SIFT plus its environment) is modeled as a random variable taking values in a set of "accomplishment levels." These levels are defined in terms of four attributes of total system behavior: safety, no change in mission profile, no operational penalties, and no economic penalties. The "base model" of the total system is a stochastic process whose states describe the internal structure of SIFT as well as relevant conditions of its environment. Base model state trajectories are related to accomplishment levels via a "capability function" which is formulated in terms of a three-level model hierarchy. Solution methods are then applied to determine the performability of the total system for various choices of computer and environment parameter values.
SIFT computer, Fault tolerant computing, performability evaluation, performance evaluation, reliability evaluation
J.F. Meyer, D.G. Furchtgott, L.T. Wu, "Performability Evaluation of the SIFT Computer", IEEE Transactions on Computers, vol.29, no. 6, pp. 501-509, June 1980, doi:10.1109/TC.1980.1675609