scholarly journals Application of Failure Mode Effect and Criticality Analysis (FMECA) to a Computer Integrated Manufacturing (CIM) Conveyor Belt

2018 ◽  
Vol 8 (3) ◽  
pp. 3023-3027
Author(s):  
I. Elbadawi ◽  
M. A. Ashmawy ◽  
W. A. Yusmawiza ◽  
I. A. Chaudhry ◽  
N. B. Ali ◽  
...  
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Production Systems ◽  
Conveyor Belt ◽  
Computer Integrated Manufacturing ◽  
Formal Specifications ◽  
Production Time ◽  
Integrated Manufacturing ◽  
Mode Effect ◽  
Criticality Analysis

Fault finding and failure predicting techniques in manufacturing and production systems often involve forecasting failures, their effects, and occurrences. The majority of these techniques predict failures that may appear during the regular system production time. However, they do not estimate the failure modes and they require extensive source code instrumentation. In this study, we suggest an approach for predicting failure occurrences and modes during system production time intervals at the University of Hail (UoH). The aim of this project is to implement failure mode effect and criticality analysis (FMECA) on computer integrated manufacturing (CIM) conveyors to determine the effect of various failures on the CIM conveyor belt by ranking and prioritizing each failure according to its risk priority number (RPN). We incorporated the results of FMECA in the development of formal specifications of fail-safe CIM conveyor belt systems. The results show that the highest RPN values are for motor over current failure (450), conveyor chase of vibration (400), belt run off at the head pulley (200), accumulated dirt (180), and Bowed belt (150). The study concludes that performing FMECA is highly effective in improving CIM conveyor belt reliability and safety in the mechanical engineering workshop at UoH.

Failure Mode, Effect and Criticality Analysis of CNC Grinder

2011 ◽  
Vol 141 ◽  
pp. 284-288
Author(s):  
Hong Jun Wang ◽  
Lei Sun ◽  
Lei Shi
Keyword(s):  
Failure Mode ◽  
Production Line ◽  
Failure Modes ◽  
Mode Effect ◽  
Technical Basis ◽  
Criticality Analysis ◽  
Fault Record

CNC grinder is considered as the key equipment of camshaft production line. Its reliability directly influences the quality of the products. This article takes an analysis of fault record of 15 sets of CNC grinders of production line, gets failure positions analysis, and then reaches data of failure modes, fault reason of CNC grinder. Comprehensive analyses of criticality for the machine are done through establishing models. Therefore, this analysis provides technical basis for repair, maintenance and update of CNC grinder of camshaft production line.

Integrating Environmental Assessment of Failure Modes in Maintenance Planning of Production Systems

2013 ◽  
Vol 295-298 ◽  
pp. 651-660 ◽  
Author(s):  
Francesco Costantino ◽  
Giulio Di Gravio ◽  
Massimo Tronci
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Production Systems ◽  
Sustainable Manufacturing ◽  
Maintenance Program ◽  
Critical Issues ◽  
Quality Of Products ◽  
The One ◽  
Definition Of ◽  
Criticality Analysis

Apart from preventing and controlling economical, technical and safety impacts of failures, so to reduce at best production losses, maintenance target is to systematically check and improve the allocation and usage of resources in order to assure quality of products and processes. At the same time, consumption of resources and their relative environmental impacts are becoming a central issue in the new international regulations and standards for sustainable manufacturing. On these considerations, the paper proposes an innovative methodology that, starting from the principles of FMECA (Failure Mode, Effects and Criticality Analysis), extends its own concepts with the introduction of a specific index to measure environmental effects of failures. Starting from the traditional definition of the RPN (Risk Priority Number) of a failure mode, the approach defines a new indicator (Environmental Indicator) to extend the results of FMECA and take in consideration the most critical issues of environmental protection: consumption of materials, emissions and wastes, lifespan of systems. Using this tool, maintenance scheduling can be defined considering also an environmental perspective. The methodology is tested on the maintenance program of a manufacturing line in a pharmaceutical production system and results are compared to the one obtained using a traditional FMECA approach.

Design of a supervisory algorithm based on failure mode effect criticality analysis for classification of different fault types of attitude determination sensors

2018 ◽  
Vol 233 (6) ◽  
pp. 2084-2100 ◽  
Author(s):  
Mostafa Abedi
Keyword(s):  
Failure Mode ◽  
System Reliability ◽  
Failure Modes ◽  
Attitude Determination ◽  
Mode Effect ◽  
Four Levels ◽  
Faulty Sensors ◽  
Criticality Analysis

In this paper, a supervisory algorithm for attitude determination sensors of a three-axis satellite is suggested to classify different fault types of this system. The presented solution is based on the computation of rotation matrices between the orbital and body frames. Using the Euler angles provided by these rotations, some variance measures are computed, which utilized as an analytical tool for the determination of faulty sensors and the related fault sources. According to the mentioned idea, it is shown that the fault sources could be categorized into four levels. Each level shows the fault extent and its criticality. To include the reliability aspects in this paper, a failure mode effect criticality analysis is conducted to determine different failure modes, which really occur in sensors. For this, the probability levels and the severity numbers were assigned to derive the critical ones. It is shown that most of the critical failure modes could be isolated by the proposed methods; in other words, the design process is based on real faulty scenarios that can improve the system reliability. Finally, by performing some numerical simulations, performance of the developed algorithms are validated.

Fuzzy risk assessment for electro-optical target tracker

2016 ◽  
Vol 33 (6) ◽  
pp. 830-851 ◽  
Author(s):  
Soumen Kumar Roy ◽  
A K Sarkar ◽  
Biswajit Mahanty
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Linear Equations ◽  
Mode Analysis ◽  
Failure Behavior ◽  
Membership Functions ◽  
Design And Development ◽  
Effect Analysis ◽  
Content Type ◽  
Criticality Analysis

Purpose – The purpose of this paper is to evolve a guideline for scientists and development engineers to the failure behavior of electro-optical target tracker system (EOTTS) using fuzzy methodology leading to success of short-range homing guided missile (SRHGM) in which this critical subsystems is exploited. Design/methodology/approach – Technology index (TI) and fuzzy failure mode effect analysis (FMEA) are used to build an integrated framework to facilitate the system technology assessment and failure modes. Failure mode analysis is carried out for the system using data gathered from technical experts involved in design and realization of the EOTTS. In order to circumvent the limitations of the traditional failure mode effects and criticality analysis (FMECA), fuzzy FMCEA is adopted for the prioritization of the risks. FMEA parameters – severity, occurrence and detection are fuzzifed with suitable membership functions. These membership functions are used to define failure modes. Open source linear programming solver is used to solve linear equations. Findings – It is found that EOTTS has the highest TI among the major technologies used in the SRHGM. Fuzzy risk priority numbers (FRPN) for all important failure modes of the EOTTS are calculated and the failure modes are ranked to arrive at important monitoring points during design and development of the weapon system. Originality/value – This paper integrates the use of TI, fuzzy logic and experts’ database with FMEA toward assisting the scientists and engineers while conducting failure mode and effect analysis to prioritize failures toward taking corrective measure during the design and development of EOTTS.

Failure mode, effects and criticality analysis improvement by using new criticality assessment and prioritization based approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ammar Chakhrit ◽  
Mohammed Chennoufi
Keyword(s):  
Failure Mode ◽  
Conventional Method ◽  
Fuzzy Inference System ◽  
Risk Evaluation ◽  
Failure Modes ◽  
Fuzzy Inference ◽  
Decision Makers ◽  
Inference System ◽  
Content Type ◽  
Criticality Analysis

Purpose This paper aims to enable the analysts of reliability and safety system to assess the criticality and prioritize failure modes perfectly to prefer actions for controlling the risks of undesirable scenarios. Design/methodology/approach To resolve the challenge of uncertainty and ambiguous related to the parameters, frequency, non-detection and severity considered in the traditional approach failure mode effect and criticality analysis (FMECA) for risk evaluation, the authors used fuzzy logic where these parameters are shown as members of a fuzzy set, which fuzzified by using appropriate membership functions. The adaptive neuro-fuzzy inference system process is suggested as a dynamic, intelligently chosen model to ameliorate and validate the results obtained by the fuzzy inference system and effectively predict the criticality evaluation of failure modes. A new hybrid model is proposed that combines the grey relational approach and fuzzy analytic hierarchy process to improve the exploitation of the FMECA conventional method. Findings This research project aims to reflect the real case study of the gas turbine system. Using this analysis allows evaluating the criticality effectively and provides an alternate prioritizing to that obtained by the conventional method. The obtained results show that the integration of two multi-criteria decision methods and incorporating their results enable to instill confidence in decision-makers regarding the criticality prioritizations of failure modes and the shortcoming concerning the lack of established rules of inference system which necessitate a lot of experience and shows the weightage or importance to the three parameters severity, detection and frequency, which are considered to have equal importance in the traditional method. Originality/value This paper is providing encouraging results regarding the risk evaluation and prioritizing failures mode and decision-makers guidance to refine the relevance of decision-making to reduce the probability of occurrence and the severity of the undesirable scenarios with handling different forms of ambiguity, uncertainty and divergent judgments of experts.

scholarly journals A IMPORTÂNCIA DA CLASSIFICAÇÃO E QUALIDADE DA MATÉRIA-PRIMA COURO: UM ESTUDO DE CASO

Revista GESTO ◽  
2014 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Mairo Luiz Madalozzo Vencato ◽  
Augusto José Pinto Souto
Keyword(s):  
Failure Mode ◽  
Font Size ◽  
Normal Text ◽  
Mode Effect ◽  
Criticality Analysis

<span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 0pt; line-height: normal; text-indent: 0cm;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; font-size: 12pt;">Este artigo envolve o tema sobre a classificação e qualidade da matéria-prima couro na empresa Gobba Leather Indústria e Comércio Ltda. Os objetivos são analisar o processo interno de classificação e as medições da qualidade como ocorrem na empresa. Justifica-se este escrito pela relevância econômica e social da empresa, no seu ramo de atuação desde 1915, sendo esta empresa fortemente influenciadora do Produto Interno Bruto do município de Nova Esperança do Sul, no Vale do Jaguari - RS, além dos produtos da empresa serem exportados para os cinco continentes do mundo. O problema de pesquisa visa verificar como se procede na classificação da matéria-prima couro e como são os controles de qualidade da empresa? A metodologia adotada apresenta características quali-quantitativa, de abordagem exploratória descritiva. Sendo um levantamento bibliográfico com pesquisa documental e na forma de estudo de caso. Formulou-se um questionário estruturado com respostas nas escalas de sensibilidade e aplicados na população de vinte colaboradores ligados diretamente ao processo operacional. Conclui-se que a empresa trabalha satisfatóriamente em relação à classificação e qualidade da matéria-prima couro. Como aperfeiçoamento sugere-se melhorias na forma parcial de plano de ação, entre elas, sugere-se o uso da ferramenta FMECA (Failure Mode, Effect and Criticality Analysis), os conceitos de classificação de Perfetti (2004) e monitoramento das imperfeições no couro de Georgieva <em style="mso-bidi-font-style: normal;">et. al.</em>(2004), reduzindo às perdas na matéria-prima.</span></p><span style="font-family: Times New Roman; font-size: small;"> </span>

scholarly journals Identifikasi Potensi Modus Kegagalan Yang Dapat Menghambat Kelancaran Proses Pelayanan Rawat Jalan Menggunakan Failure Mode Effect Analysis (FMEA) Di Rumah Sakit BM Jakarta Barat

2020 ◽  
Vol 8 (2) ◽  
pp. 105-113
Author(s):  
Achmaddudin Sudiro
Keyword(s):  
Failure Mode ◽  
Failure Modes ◽  
Outpatient Service ◽  
Outpatient Services ◽  
Effect Analysis ◽  
Outpatient Unit ◽  
Mode Effect ◽  
Potential Failure ◽  
Fmea Method ◽  
Failure Mode Effect Analysis

Outpatient services hosted by the hospital have never been absent from public visits. In fact, every year an outpatient visitor is always increasing. This research intends to identify potential failure mode that can  inhibit of every flow of service in the outpatient care unit using the Failure Mode Effect Analysis (FMEA) method. Qualitative research plan using an observation survey approach and in-depth interviews with the outpatient service head Coordinator conducted in February 2020 on the hospital outpatient unit service process. The results of this study Indicate the potential failure mode that has the value of the RPN above the value of cut off point 180 as many as six out of ten failure modes. Firstly, the check is not on schedule (360), secondly, the patient lags a turn call order Check (270), third, Specific drug failure is not available (245), fourth, general patient protests with the price of the drug (224), fifth, the patient is void to poly (196), the sixth patient registrant online missed sequence number queue (180). Based on the results of the research, hospitals are expected to follow up with the results of this research by conducting a redesign of the process that occurs today using the FMEA to maintain service quality.

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