Issue No. 08 - August (1980 vol. 29)
J.F. Meyer , Department of Electrical and Computer Engineering and the Department of Computer and Communication Sciences, University of Michigan
If the performance of a computing system is "degradable," performance and reliability issues must be dealt with simultaneously in the process of evaluating system effectiveness. For this purpose, a unified measure, called "performability," is introduced and the foundations of performability modeling and evaluation are established. A critical step in the modeling process is the introduction of a "capability function" which relates low-level system behavior to user-oriented performance levels. A hierarchical modeling scheme is used to formulate the capability function and capability is used, in turn, to evaluate performability. These techniques are then illustrated for a specific application: the performability evaluation of an aircraft computer in the environment of an air transport mission.
reliability evaluation, Degradable computing systems, fault-tolerant computing, hierarchical modeling, performability evaluation, performance evaluation
J. Meyer, "On Evaluating the Performability of Degradable Computing Systems," in IEEE Transactions on Computers, vol. 29, no. , pp. 720-731, 1980.