Root Cause Analysis (RCA): Steps, Tools, And Examples

Fault tree analysis example. Source: Six Sigma Study Guide. Fault tree analysis tries to map the logical relationships between faults and the subsystems of a machine. The fault you are analyzing is placed at the top of the chart. If two causes have a logical OR combination causing effect, they are combined with a logical OR operator.

Availability Performance Analysis of Thermal Power Plants ...

The availability analysis of power plants can help to understand the effects of failures of sub-system on overall availability of the plant [ 2, 3 ]. High availability of the plant means increased production efficiency [ 4 ]. The Northern region of India contributes around 26.53% for total thermal generation of country.

A review of prognostics and health management of machine ...

Fault Tree Analysis (FTA) is complementary to the FMEA since its strength is the shortcoming of FMEA: being able to convey a simple graphical representation of the interactions among the different faults which can affect the machine; 3. root cause analysis aims at the identification of the root cause of a fault.

Propulsion Shaft and Gearbox Failure in Marine Vessels: A ...

The need to mitigate downtime in marine vessels arising from propulsion system failures has led ship operating companies to devote enormous resources for research based solutions. This paper applied duration models to determine failure probabilities of shaft and gearbox systems in service boats. Using dockyard's event history data on boat repairs and maintenance, we applied …

Causal tree analysis of depth degradation of the lead acid ...

Highlights Study the degradation analysis using fault tree and causal tree. Study the undesirable aging process of the battery during operation. Study the undesirable aging process of the battery during manufacturing process. Parameters variation of lead acid battery allows determining the degree of degradation. Judge the state of the battery lifetime.

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1. Failure modes and effects analysis (FMEA). 2. Fault tree analysis (FTA). 3. Structured What-If Technique (SWIFT). 2.2. Failure mode and effects analysis FMEA (Failure Mode and Effects Analysis) is an inductive and bottom-up method to identify failure modes, effects and causes of technical systems [5]. The analysis starts at the component ...

Fault tree analysis of failure cause of crushing plant and ...

2. Fault tree analysis. Fault tree analysis is a systematic safety analysis tool that proceeds deductively from the occurrence of an undesired event (accident) to the identification of the root causes of that event .. Fault tree analysis starts with a "top event" that generally display with rectangular and related events based on logical relations with the top event that are drown …

Fault Tree Analysis (FTA) – Definition & Examples ...

Fault Tree Analysis is a diagrammatical representation of different causes of system failure. Whenever an undesirable event occurs in an organization, you need to analyze its origin with the help of Fault Tree Analysis. You can check the system's reliability while stepping across a series of events in a logical manner.

(PDF) Maintenance: Changing Role in Life Cycle Management ...

Maintenance: Changing Role in Life Cycle Management S. Takata1 (1), F. Kimura2 (1), F.J.A.M. van Houten3 (1), E. Westkämper4 (1) M. Shpitalni5 (1), D. Ceglarek6 (2), Jay Lee7 1 Waseda University, Japan, 2The University of Tokyo, Japan, 3 University of Twente, the Netherlands, 4Fraunhofer IPA, Germany, 5Technion, Israel, 6 University of Wisconsin …

Fault Tree Analysis - Six Sigma Study Guide

What is Fault Tree Analysis Fault tree analysis (FTA) is a graphical tool to explore the causes of system level failures. It uses boolean logic to combine a series of lower level events and it is basically a top-down approach to identify the component level failures (basic event) that cause the system level failure (top event) to occur.

(PDF) Fault Tree Analysis: A Case Study from Machine …

In this paper, fault tree analysis (FTA) method is used for reliability analysis of CNC turning center. The major faults associated with the system and the causes for the faults are presented ...

Practical Plant Failure Analysis A Guide To Understanding ...

scientific research in any way. in the middle of them is this practical plant failure analysis a guide to understanding machinery deterioration and improving equipment reliability mechanical engineering that can be your partner. Practical Plant Failure Analysis-Neville W Sachs, P.E. This is a practical guide

STSARCES - Annex 5 - the web portal for machine pros

Fault Tree Analysis (FTA) Overview of the method. This deductive method starts out from a dangerous system failure, determined for instance by risk analysis, and looks for combinations of events that could lead to this failure. The Fault Tree models the influences of the failure of one component or a series of components on a dangerous event.

Fault Tree Analysis (FTA) and Event Tree Analysis (ETA)

Fault Tree Analysis (FTA) In many cases there are multiple causes for an accident or other loss-making event. Fault tree analysis is one analytical technique for tracing the events which could contribute. It can be used in accident investigation and in a detailed hazard assessment.

(PDF) Improving effectiveness of manufacturing systems ...

An integrated qualitative trend analysis approach to identify process abnormalities: A case of oil export pumps in an offshore oil and gas production facility. By Hemali Kesaria. Maintenance 4.0 to fulfil the demands of Industry 4.0 and Factory oftheFuture. By QUEST JOURNALS.

Fault Forecasting of a Machining Center Tool Magazine ...

Fault tree analysis (FTA) is used to analyze the mechanism of every fault mode, and the relationship between fault mode and performance indicators is established from the level of fault mechanism. As shown in Figure 2, we determine the performance indicators of each subcomponent on the basis of the results of the aforementioned fault analysis.

Fault-Tree Analysis - an overview | ScienceDirect Topics

Fault-Tree Analysis Fault tree analysis (FTA) is an investigation of how a selected "top" fault (abnormal condition) or failure event, for example, an unintended/undesired release of a hazardous material, can be resolved into its causes. From: Risk Analysis and Control for Industrial Processes - Gas, Oil and Chemicals, 2015 Download as PDF

Mazak Case Study | PDF | Reliability Engineering ...

The cause-effect identification tools such as failure mode effect analysis and Fault tree analysis comes in very handy to identify the root of the fault. The overall reliability of the machine can be improved and availability will be assured during the operations after the prognosis part is …

PCB Failure Analysis | Printed Circuit Board Tests |NTS

PCB Failure Analysis: Identification and Testing of Defects. From cheap toys and smartphones to sophisticated computers and radar detector systems, printed circuit boards (PCB) are critical components for today's electronic and industrial technology.Almost every electronic device has one of these self-contained modules of complex interconnected electronic components, which …

Fault tree analysis of failure cause of crushing plant and ...

Fault tree analysis Fault tree analysis is a systematic safety analysis tool that proceeds deductively from the occurrence of an undesired event (accident) to the identification of the root causes of that event [15].

US4870575A - System integrated fault-tree analysis methods ...

The subject invention employs a system integrated fault-tree analysis (SIFTAN) which has the unique ability to detect all latent hardware and software design defects that could cause unanticipated critical failure of a complex software controlled electronic system. This new approach modifies and then integrates two existing system analysis techniques-namely, …

Intelligent fault diagnosis system based on big data - Wu ...

The intelligent fault diagnosis is developed upon the basis of expert system, fuzzy mathematics, and fault tree analysis (FTA) and machine-learning methods . 2.1 Expert system. The expert system is a computer system that can solve complex problems with a large number of knowledge-based rules and reasoning methods in certain fields.

Medium Induction Motor Winding Insulation Protection ...

Electrical causes α (%) Fc OL (Overload) 30 POL 1.14*10-2 UB (unbalance) 14 PUB 5.32*10-3 (VV)Voltage Variations 9 PVV 3.8*10-3 FOV(Fast Overvoltage) 10 POV 3.42*10-3 OH(ambian.overheat) 7 POH 2.66*10-3 4 Fault Tree Analysis (FTA) of stator failure A Fault Tree is constructed to determine all possible causes that can lead to the undesirable ...

IOP Conference Series: Materials Science and Engineering ...

This paper presents a study of development the tool life's mathematical model during the milling process on High Thermal Conductivity Steel 150 (HTCS-150) 56 HRC. Using response surface methodology, the mathematical models for tool life have been developed in terms of cutting speed, feed rate and depth of cut.

(PDF) Reliability Analysis of the Main Drive System of a ...

2.1 The reliability analysis of CNC machine tools and their systems . ... (Fault Tree . Analysis based) ... reliability of a CNC milling machine tool and concluded that the MTB F of the analysed .

On establishing cost‐effective condition‐based maintenance ...

(3) Identifying damage causes and development: based on the deterioration process described in Step 2, it will be possible to identify damage causes and development using backward analysis, i.e.: identifying failure modes, damage developing mechanisms for every failure mode; listing out the causes of damage initiation for every failure mode ...

ASSESSMENT OF SOME PERFORMANCE CHARACTERISTICS …

assessment of some performance characteristics of refuse boiler before and after overhaul using failure mode effect and fault tree analyses a. c. igboanugo 1, j. o. asalor 2, v. i. egbiremon 1department of production engineering, university of benin, benin-city, nigeria 2department of mechanical engineering, university of benin, benin-city, nigeria e-mails: …

CDC - Mining - Using Fault-Tree Analysis To Focus Mine ...

Fault tree analysis is a systematic safety analysis tool that proceeds deductively from the occurrence of an undesired event (accident) to the identification of the root causes of that event. One recurring mine safety problem - a dozer falling into a void over a drawpoint on a coal surge pile - was analyzed using available, inexpensive fault ...

Root Cause Analysis Techniques for the Lubrication ...

Wear debris analysis is an assessment of the machine and may be employed to help evaluate machine failures whether or not the lubricant is suspected as a root cause. The technique's power lies in the fact that a wear particle that is generated by a failed or failing machine is the mirror image of the component surface that generated the particle.

Failure mode, impact and hazard analysis (FMECA) - Cnc ...

The failure mode, impact and criticality analysis (FMECA) is aimed at all possible failures of the product, and based on the analysis of the failure mode, determines the impact of each failure mode on the product's work, finds out the single point of failure, and presses the severity of the failure mode The degree and its probability of occurrence determine its hazard.

Condition-based fault tree analysis (CBFTA): A new method ...

System reliability analysis is done when a failure is detected by introducing the new λ FS i value into the original fault tree to produce the CBFTA. CBFTA can also be carried out as a simulation of bearing failure to assist system designers predicts the tradeoffs between sensitive component costs and system reliability, and other tradeoffs.

Remaining Useful Life (RUL) Prediction of Equipment in ...

1. Introduction. A production line is typically a set of equipment or machines established in a factory where components are assembled sequentially to make a finished product [].Nowadays, manufacturers use different kinds of machines for production, and over time, these machines and the associated equipment may deteriorate, and sometimes even the entire …

Machines | Free Full-Text | New FMEA Risks Ranking ...

Gupta, G.; Mishra, R.P. A Failure Mode Effect and Criticality Analysis of Conventional Milling Machine Using Fuzzy Logic: Case Study of RCM: A FMECA of Conventional Milling Machine Using Fuzzy Logic. Qual. Reliab. Eng. Int. 2017, 33, 347–356. [Google Scholar]