scholarly journals Risk analysis in maintenance processes

2020 ◽  
Vol 12 (4) ◽  
pp. 64-76
Author(s):  
Przemysław Drożyner
Keyword(s):  
Risk Analysis ◽  
Added Value ◽  
Repair Work ◽  
Pareto Analysis ◽  
Maintenance And Repair ◽  
Reliability Indicators ◽  
Failure Data ◽  
Failure Risk ◽  
Risk Of Failure ◽  
Operational Data

Abstract The article aims to present practical methods for prioritising the activities of maintenance departments based on the Pareto analysis and the failure risk analysis. Based on the collected data on the number of observed failures and their removal times, commonly known reliability indicators were determined, which were then used to estimate the probabilities and consequences of failures in terms of the risk of loss of production continuity. Based on commonly collected failure data, the developed methods allow proposing to the maintenance departments the sequence of maintenance and repair work to be undertaken in terms of minimising the risk of failure. Risk analysis is somewhat commonly used in the practice of maintenance departments (e.g. RBI, FMEA, ETA, FTE, HIRA). The added value of this work is the use of reliability indicators for estimating the values of risk components, i.e., probability and consequences. The method was developed on the basis of operational data collected in one of the plants of the dairy cooperative and, after assessing the effects of its implementation, it was implemented in other enterprises of the cooperative.

scholarly journals Formulation of objective indices to quantify machine failure risk analysis for interruptions in radiotherapy

2020 ◽  
Author(s):  
Daisuke Kawahara ◽  
Hisashi Nakano ◽  
Akito Saito ◽  
Yusuke Ochi ◽  
Yasushi Nagata
Keyword(s):  
Risk Analysis ◽  
Machine Failure ◽  
Failure Risk

Fracture Failure Risk Analysis of Pressure Pipeline Containing Defects on Pile Foundation Settlement

2006 ◽  
Author(s):  
Xiang Li ◽  
Jinyang Zheng ◽  
Yujun Xie
Keyword(s):  
Risk Analysis ◽  
Failure Probability ◽  
Pile Foundation ◽  
Moment Equation ◽  
Assessment Procedure ◽  
Foundation Settlement ◽  
Disastrous Consequence ◽  
Fracture Failure ◽  
Failure Risk ◽  
Pressure Pipeline

Pile foundation settlement might cause a disastrous consequence to an in-service pressure pipeline. Flaws, which are unavoidable in the pipeline, lead to reduction of load-supporting capability and service life of the pipeline. So fracture failure risk analysis of in-service pressure pipeline is important in engineering. Failure probability of pipeline due to pile foundation settlement is computed by using the well-known safety assessment procedure R6. Three-moment equation is adopted to compute bending moment in the condition of n piles, where n is the number of piles. A numerical example was presented to illustrate the application of fracture failure risk analysis to determine the failure probability of the pressure pipeline, considering the uncertainties in various internal operating loadings and external forces, flaw sizes, material fracture toughness and flow stress. Furthermore, the failure probabilities of each defect and the whole pipeline were obtained.

scholarly journals Maintenance and Repair Work

2019 ◽  
Vol 11 (2) ◽  
pp. 153-167 ◽  
Author(s):  
Dominique Vinck
Keyword(s):  
Repair Work ◽  
Maintenance And Repair

Prediction of Corrosion Condition Considering Effect of Maintenance

2014 ◽  
Author(s):  
Norio Yamamoto
Keyword(s):  
Prediction Model ◽  
Protective Coatings ◽  
Performance Standard ◽  
Repair Work ◽  
Corrosion Condition ◽  
Paint Coating ◽  
Maintenance And Repair ◽  
Permissible Level ◽  
Corrosion Model ◽  
Full Probability

Corrosion prediction model which takes an effect of maintenance and repair into account is developed based on the full probability corrosion model. Over-all coating repair, touch-up coating repair and renewing repair of worn member are considered. Change in the corrosion condition due to the maintenance and repair work is modeled and possibility of such change is evaluated. Based on the developed model, the effects of these maintenance and repair methods to the corrosion condition are numerically examined and discussed. In these numerical examinations, a conventional paint coating and a coating which meets the PSPC (IMO’s Performance Standard for Protective Coatings) specification are examined. Change in corrosion wastage condition due to the maintenance and repair works is evaluated and compared. And the probability that the corrosion wastage exceeds the permissible level is also evaluated.

scholarly journals Dynamic analysis of different business failure process

2017 ◽  
Vol 15 (2) ◽  
pp. 486-499 ◽  
Author(s):  
Rocío Flores-Jimeno ◽  
Inmaculada Jimeno-García
Keyword(s):  
Dynamic Analysis ◽  
Empirical Evidence ◽  
Failure Process ◽  
Business Failure ◽  
Financial Indicators ◽  
Failure Risk ◽  
Risk Of Failure ◽  
Financial Failure

This work is framed in the research of business failure. We examine a method of analyzing the dynamics of financial failure. The authors examine a method of analyzing the dynamics of financial failure, because our goal is to analyze how the economic and financial indicators show the risk of failure in a group of companies. Using a sample of 163 companies declared bankrupt or dissolved, the authors show how to depict company trajectories of behavior and movement to terminal failure. They analyze these trajectories to find and describe empirical evidence of the different dynamics of bankruptcy. The authors also show that the estimation of failure risk is more accurate when these different failure trajectories are defined. In conclusion, the authors can see that there are different failure trajectories. One can use these different trajectories to identify more efficiently the indicators warning of the failure risk of the companies analyzed.

scholarly journals Costs Analysis of Iron Casts Manufacturing

2012 ◽  
Vol 12 (2) ◽  
pp. 45-48 ◽  
Author(s):  
S. Kukla
Keyword(s):  
Added Value ◽  
Manufacturing Processes ◽  
Production Flow ◽  
Pareto Analysis ◽  
Costs Analysis ◽  
Constant Improvement ◽  
Plant Transport

Costs Analysis of Iron Casts Manufacturing The article presents the issues of costs analysis of iron casts manufacturing using automated foundry lines. Particular attention was paid to departmental costs, conversion costs and costs of in-plant transport. After the Pareto analysis had been carried out, it was possible to set the model area of the process and focus on improving activities related to finishing of a chosen group of casts. In order to eliminate losses, the activities realised in this domain were divided into activities with added value, activities with partially added value and activities without added value. To streamline the production flow, it was proposed to change the location of workstations related to grinding, control and machining of casts. Within the process of constant improvement of manufacturing processes, the aspect of work ergonomics at a workstation was taken into account. As a result of the undertaken actions, some activities without added value were eliminated, efficiency was increased and prime costs of manufacturing casts with regard to finishing treatment were lowered.

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