in recent years, many manufacturing industries for promoting their efficiency have tended to use the automatic manufacturing systems. expanding automatic systems and to increase their complexity are representing the necessity of studying a proper functional quality and using reliable equipment in such systems more than ever. in this direction, the technique of fault tree analysis (fta), along w...

In order to safeguard the safety of passengers and reduce maintenance costs, it is necessary to analyze and evaluate the security risk of the Railway Signal System. However, the conventional Fuzzy Analytical Hierarchy Process (FAHP) can not describe the fuzziness and randomness of the judgment, accurately, and once the fuzzy sets are described using subjection degree function, the concept of fu...

Reliability centered maintenance (RCM) is a new strategic framework for evaluating system requirements in its operating conditions. Some industries employ predictive strategies addition to preventive (PM) strategies, which increase production costs. As the breakdown (BDM) technique used, cost increases. The RCM approach mixture of these that can be used optimize costs and ensure availability sy...

Traditional methods for the assessment of software safety suffer from poor integration (from methodological, operational and semantic points of view) both with each other and with the rest of the development lifecycle of safety-critical systems. Our goal is to develop a set of methods and tools which address these weaknesses, and this paper describes our current research into these areas. We de...

PT. X is a services and manufacturing company. Y one of some industrial companies use the X, biggest chemical fertilizer producer in Southeast Asia. PT uses 66 belt-conveyors for distributing material. In order to arrange maintenance schedule, used preventive calculations using Failure Mode Effect Critically Analysis method (FMECA). Preventive schedule conveyor belt’s components (belt primary c...

Electrical energy is a vital source of for human life. Currently, various power plants can provide electrical energy, one which the Steam Power Plant (PLTU). A PLTU must carry out operational tasks repeatedly and continuously to meet electricity needs. Based on historical data PT. PJB Service Kendari last three years, there has been an increasing trend downtime derating at Nii Tanasa in 2019–20...

Acting upon the data involved in typical diagnostics and prognostics tasks is often confounded by the complexity of the corresponding situation and needs to take into account domain-specific or even installation-specific knowledge considerations. While domain knowledge is often captured in various forms, such as is typically done in Fault Modes, Effects and Criticality Analysis (FMECA), the con...

Dependability analyses in the design phase are common IEC 60300 standards to assess reliability, risk, maintainability, and maintenance supportability of specific physical assets. Reliability risk assessment uses well-known methods such as failure modes, effects, criticality analysis (FMECA), fault tree (FTA), event (ETA)to identify critical components modes based on rate, severity, detectabili...

The Fault Mode Effects and Criticality Analyses (FMECA), describe the impact of identified faults. They form an important category of knowledge gathered during the design phase of a satellite, and are used also for diagnosis activities. This paper proposes their extension, allowing a finer representation of the available knowledge, at approximately the same cost, through the introduction of an ...

Abstract Heavy-duty machine tools are composed of many subsystems with different functions, and their reliability is governed by the reliabilities these subsystems. It important to rank weaknesses identify weakest subsystem optimize products improve reliabilities. However, traditional ranking methods based on failure mode effect critical analysis (FMECA) does not consider complex maintenance pr...