Multi-Fragmental Availability Models of Critical Infrastructures with Variable Parameters of System Dependability

Publication Type:

Journal Article


Information & Security: An International Journal, Volume 28, Issue 2, Number 20, p.248-265 (2012)


business-critical infrastructure, defects, dependability indicators, evolu¬tion of software, fault-tolerant architectures, IT-infrastructures, macrograph., Markov and semi-Markov chains, Modelling, safety block diagrams, variable parameter


This paper presents the development of the MFMC-based methodology and technique for modelling and quantitative availability assessment of critical IT-infrastructure consisting of maintained and partially unmanned systems. It takes into consideration a variation of system and component parameters and, in particular, variation of failure rates caused by detection and elimination of design faults.