V. Catania et al., A MODELING FRAMEWORK TO EVALUATE PERFORMABILITY PARAMETERS IN GRACEFULLY DEGRADING SYSTEMS, IEEE transactions on industrial electronics, 40(5), 1993, pp. 461-472
The paper provides a systematic approach to modeling and assessing gra
cefully degrading systems, exploiting the formalism offered by Petri n
ets. The procedure followed is based on the definition of some fundame
ntal modules, the composition of which allows a complete model of the
system to be obtained. The model can then be solved by computer simula
tion or analytically by means of a class of Petri nets to obtain inter
esting performability parameters either at steady state and at varying
times. The paper examines a number of real cases and describes the re
sults obtained.