In this paper we present a general framework for conducting robustness analysis early in the development life cycle of web-based systems. This framework exploits the robustness failure modes and evaluates the impact of modifications that can be applied to reduce the severity of these failures. First, the system is systematically decomposed in its components using Jacobson’s analysis. Next, with...

Ensuring fast and accurate failure detection is a fundamental issue for building efficient fault-tolerant distributed systems. In an effort to make fault-tolerant applications easier to implement, we are trying to provide failure detection as a generic Internet service, similar to what was done very successfully with NTP (network time protocol) for clock synchronization. To do so, we must revis...

Malay Niraj, Praveen Kumar, Dr. A.Mishra Abstract -Present study is an approach for f inding the suitable maintenance practice and frequency of maintenance with the help of criticality factor of equipment it is based on failure mode evaluation and criticality analysis. Criticality means the failure probability of the equipment is very high. The miner failure of critical equipment may leads to s...

While use of LEDs in fiber optics and lighting applications is common, their use in medical diagnostic applications is very rare. Since the precise value of light intensity will be used to interpret patient results, understanding failure modes is very important. We used the Failure Modes and Effects Criticality Analysis (FMECA) tool to identify the critical LED failure modes. Once the critical ...

The Energy Institute (EI) has supported and co-ordinated an oil and gas industry project to investigate potential measures for the ageing effects on Safety Critical Elements (SCEs) as defined by the offshore safety regulations Prevention of Fire and Explosion, and Emergency Response, (PFEER), and Design and Construction etc. (DCR). This investigation has led to a measurement method of business ...

Today, billions of dollars are being spent annually world wide to develop, manufacture, and operate transportation system such trains, ships, aircraft, and motor vehicles. Around 70 to 90 percent of transportation crashes are, directly or indirectly, the result of human error. In fact, with the development of technology, system reliability has increased dramatically during the past decades, whi...

The Failure Mode and Effects Analysis (FMEA) design discipline involves the examination at design time of the consequences of potential component failures on the functionality of a system. It is clear that this type of information could also prove useful for diagnostic purposes. Unfortunately, this information cannot be fully utilised for diagnosis when FMEA has been performed by human engineer...

Fully autonomous vehicles promise enormous gains in safety, efficiency, and economy. Before such gains can be realized, safety and reliability concerns must be addressed. We have previously introduced a system for managing such vehicles at intersections that is capable of handling more vehicles and causing fewer delays than traffic lights and stop signs [2]. While the system is safe under norma...

One of the main concerns for power electronic engineers regarding capacitors is to predict their remaining lifetime in order to anticipate costly failures or system unavailability. This may be achieved using a Weibull statistical law combined with acceleration factors for the temperature, the voltage, and the humidity. This paper discusses the different capacitor failure modes and their effects...