نتایج جستجو برای: fmea و fuzyy synthetic evaluation

تعداد نتایج: 1717270  

Journal: :Symmetry 2017
Haibin Liu Xinyang Deng Wen Jiang

Failure mode and effects analysis (FMEA) is a popular and useful approach applied to examine potential failures in different products, designs, processes, and services. As a vital index, the risk priority number (RPN) can determine the risk priorities of failure modes by some risk factors such as occurrence (O), severity (S), and detection (D). However, in FMEA, the traditional risk priority nu...

ژورنال: :بهداشت و ایمنی کار 0
محسن امیدوار mohsen omidvar department of occupational health engineering, school of public health, tehran university of medical sciences, tehran, iranدکتری، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی تهران فرشته نیرومند fereshteh nirumand m.sc., department of pollution control, school of environmental engineering , ghalatghaem branch, applied sciences and technology university, tehran, iranکارشناسی ارشد، محیط زیست، گرایش کنترل آلاینده ها، دانشگاه جامع علمی کاربردی

مقدمه: روش fmea یکی از روش های پر کاربرد در ارزیابی و اولویت بندی ریسک می باشد؛ لیکن به چندین دلیل، کاربرد آن در عمل دچار محدودیت می باشد. این مطالعه با هدف حذف این محدودیت ها، با استفاده از اصول منطق فازی و تئوری خاکستری در قالب اعداد z و روش تصویر خاکستری (grp) انجام شد. روش کار: مطالعه حاضر از نوع تحلیلی-مقطعی بوده که به منظور اولویت بندی ریسک های جرثقیل سقفی انجام گردید. ابتدا یک تیم fmea م...

Journal: :Gradus 2021

This article aims to show few advanced approach method for improving Failure Mode and Effect Analysis (FMEA). The possible failure situations in the system design are investigated separately considered a Hierarchical FMEA worksheet form. authors propose three different methodological methods based on hybridized fuzzy logic FMEA.

2011
Lachlan Murray Wenguo Liu Alan F. T. Winfield Jonathan Timmis Andrew M. Tyrrell

In this paper, the reliability of a collective robotic system is analysed using two different techniques from the field of reliability engineering. The techniques, Failure Mode and Effect Analysis (FMEA) and Fault Tree Analysis (FTA), are used to analyse and compare two variants of a previously developed ‘autonomous morphogenesis’ controller. The reliability of the controller is discussed and a...

2013
Stefan SCHMIDT

Preventive methods are seldom used in logistics, although there is increasing awareness of their potential. This paper presents two examples of preventive methods currently in use, Poka-Yoke and FMEA (Failure Mode and Effect Analysis). The implementation of Poka-Yoke, the mistake proofing methodology, has been shown to drastically reduce the enormous warranty costs, including logistics costs, w...

2012
M. Kostina

Purpose: of the current research is to develop a reliability assessment method with an extension of the existing ones and pooling them to a common framework. The system must identify the most unreliable parts of a production process and suggest the most efficient ways for the reliability improvement. Design/methodology/approach: FMEA is in the centre of the proposed framework,a reliability anal...

2000
H. Zebedin

Engineering for disassembly of waste products is becoming increasingly complex. Furthermore, customer expectations are growing, competition is becoming harder, legal requirements are stricter and the quality of technical products is continuously improving. FMEA is a formalised, analytical method for the systematic, consistent collation and prevention of potential sources of errors and their res...

ژورنال: طب کار 2017

Introduction: Failure Mode Effect Analysis (FMEA) method used To identify the defects of the parts of a machine or a manufacturing process that includes several machines. The aim of this study was to compare a variety of prioritized control measures in reducing the number of risks in one of the edible oil factories. Method: This was a longitudinal and interventional study that carried o...

2014
John Duguid Grace Kielpinski Barbara Seymour

Risk assessment is a valuable tool for selection and optimization of rapid mycoplasma testing methods. Mycoplasma testing is a requirement at various stages in the production process for cell therapy products. Standard methods take at least 28 days and are not appropriate lot release tests for products with short shelf-lives. A review of 21 commercially available mycoplasma tests and ranking of...

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