Software Failure Intensity Modelling and Identification the Margins of the Complexity Index

The behaviour of failure intensity function for software reliability model with complexity index depending on the model parameters has been simulated. It allows identifying the margins of the complexity index and explaining the defect revealing function behaviour depending on software complexity.

Extending the features of software for reliability analysis of fault-tolerant systems

The developed software ASNA-2, which is an improved version of the software ASNA-1, is based on the technology of automated estimation of reliability indexes of fault-tolerant systems. This software is designed for automated evaluation of the reliability indexes of fault-tolerant hardware – software systems. This paper describes a software ASNA-2 with the peculiarities of procedures of  reliability analysis of fault-tolerant systems.

Analytical reliability model of a redundant repairable system with limited number of restorations

Modern complex mission-critical systems are built as fault-tolerant systems, i.e. having the ability to function while some of their separate elements have a fault. The complexity of such fault-tolerant systems makes their reliability models quite big and complex. Therefore, such requirements for building models, as the high level of credibility and the appropriate level of formalization, are imposed on these models, which allows to implement the automation to their creating and analysis of reliability and, therefore, using modern computer tools.

The model of radioelectronic system reliability control effectiveness

The article is concerned with the analytical evaluation data of the effectiveness of the electrodynamic system reliability control. The basis of the consideration is a study of information efficiency of interaction between a radioelectronic system and that of electronic control. The analytical expressions obtained allow the optimal ratio between the reliable and most effective operating mode of control systems to be chosen. The problem of optimal control of reliability of functioning the radioelectronic control system is stated.

Estimation the reliability of hardware/software systems by using models of their behavior

Hardware/software systems provide flexible implementation of microprocessors, microcontrollers and various peripheral devices and supply the ability to perform almost any functional algorithm that can be simply modified or replaced. For reliability estimation of hardware/software systems we must take into account not only the loss of efficiency, which was caused by the hardware failures, but the abnormal functioning, that was caused by software failures. All these features of hardware/software systems must be considered in their models for reliability indexes estimation.

85 років становлення ідей надійності в будівництві

A brief analytical overview of the structural reliability theory. Analysis of the development of the theory in the framework of adaptation in Ukraine Eurocode package of normative documents and preparation of national annexes carried out.

Approximation of trustworthiness of information objects of subject area ontology based on polynomial splines

The method of coefficient approximation of information objects domain ontologies reliability is proposed in the article. This method is based on polynomial splines. It makes it possible to remove unnecessary ontology objects that possess the reliability limit below a certain pre-specified point.

Software implementayion of improved reliability model of technical redundant system with a limited number of restorations

This paper describes an algorithm and software implementation of improved reliability model of technical redundant system with a limited number of restorations. The correlation between the number of elements, the number of their restorations and the number of states of the system, time required for their formation, and calculations of results were investigated