Dependable systems are characterized by a number of attributes including: reliability, availability, safety and security. For some attributes (namely for reliability, availability, safety), there exist probability-based theoretic foundations, enabling the application of dependability analysis techniques. The goal of dependability analysis is to forecast the values of dependability attributes, b...

In this paper, the authors examine UK mobile users’ perceptions of m-commerce utilization. For this purpose, the authors devise a Mobile Network Utilization Model empirically tested in experimental settings. The empirical findings reveal strong support for the capability of the proposed utilization model in measuring the concept of Mobile Task-Technology Fit (MTTF) and explaining the utilizatio...

Fault observability based on the behavior of memory references is studied. Traditional studies view memory as one monolithic entity that must completely work to be considered reliable. The usage patterns of a particular program’s memory are emphasized here. This paper develops a new model for the successful execution of a program taking into account the usage of the data by extending a cache me...

A resilience analysis of protection cycles (p-cycle) configurations for Double Rings with Dual Attachment (DRDAs) architectures is presented in this work. DRDAs are composed of two rings with corresponding nodes connected by two separated links. There are several possible configurations of p-cycles, which may be used in DRDAs for improving link or node protection upon link failure. The values o...

The most common approach for development, testing programs include some corrective actions during testing and some delayed fixes incorporated at the end of test. This paper presents an Extended model that addresses this practical situation given in the application part of sec 3.In this application the testing mode is considered as active mode and the delayed fixes mode as at the delivery. The r...

This paper discusses the reliability equivalences of a parallelseries system. It is assumed that the system components are independent and identical. Each has a constant failure rate. We assumed three different method to improve the system. Both the reliability function and the mean time to failure are used to derive two types of reliability equivalence factors. We also obtain the fractiles of ...

The purpose of this research is to demonstrate the importance of extracting business process mappings as a prerequisite for the implementation of the PFMEA (Process Failure Mode and Effect Analysis). In the first stage, 30 production process failures were extracted in the meetings with factory managers. Then, a team was formed by the presence of process owners, and with the help of the project ...

Background: Adverse Events (AEs) due to failure in healthcare procedures are common. These procedures are often evaluated independently. The objectives of this study are to investigate the nature of the failures in healthcare procedures of the surgical patients, assessing the frequency of these failures and preventability, and exploring their consequences, underlying causes, and prevention stra...

In this paper, we consider the problem of modeling machine availability in enterprise-area and wide-area distributed computing settings. Using availability data gathered from three different environments, we detail the suitability of four potential statistical distributions for each data set: exponential, Pareto, Weibull, and hyperexponential. In each case, we use software we have developed to ...