scholarly journals Problem-solving step analysis for increasing tire static balance levels: a case study

2021 ◽  
Vol 5 (1) ◽  
pp. 15-24
Author(s):  
Tubagus Hendri Febriana ◽  
Hendi Herlambang ◽  
Hernadewita Hernadewita ◽  
Hasbullah Hasbullah ◽  
Abdul Halim
Keyword(s):  
Film Thickness ◽  
Fault Tree Analysis ◽  
Process Variations ◽  
Thickness Variation ◽  
Static Balance ◽  
Effect Analysis ◽  
Root Cause ◽  
Preventive Actions ◽  
Manufacture Industry ◽  
Rubber Film

One of the company's efforts in implementing the commitment to customer satisfaction is carried out through continuous improvement activities. All indicators are evaluated to determine the level of quality stability against process variations that will impact non-compliance with predetermined product specifications. One of the quality problems found in the tire manufacture industry is the out-percentage of tire uniformity, which suddenly increases, one of which is the value of static balance. This study analyses the process variation factors that occur to take corrective and preventive actions through a series of Root Cause Analysis (RCA), Fault Tree Analysis (FTA), and Failure Mode and Effect Analysis (FMEA). Refers to the analysis result, it was found that there was a problem with the rubber film gauge variation at the manufacturing step of the steel breaker, one of the material components in the tire construction. Two main factors cause rubber film thickness variation:  rubber sticky with roll calendar, Radial Run Out (RRO) Roll Calendar out standard, and viscosity compound variation with 12 root problems found. The results of the improvements that have been made can effectively improve rubber film thickness variation, increase the Cpk level of steel breaker material from 0.82 to 1.91 and reduce the out percentage ratio of static balance by 54.65%.

Pseudo-Dynamic Fault Isolation Technique Using Backside Emission Microscopy – Case Study, Where All Other Methods Fail

2002 ◽  
Author(s):  
Yoav Weizman ◽  
Ezra Baruch ◽  
Michael Zimin
Keyword(s):  
Failure Analysis ◽  
Process Variations ◽  
Fault Isolation ◽  
Operating Conditions ◽  
Detection Sensitivity ◽  
Isolation Technique ◽  
Root Cause ◽  
Emission Microscopy ◽  
Failure Location ◽  
Noisy Background

Abstract Emission microscopy is usually implemented for static operating conditions of the DUT. Under dynamic operation it is nearly impossible to identify a failure out of the noisy background. In this paper we describe a simple technique that could be used in cases where the temporal location of the failure was identified however the physical location is not known or partially known. The technique was originally introduced to investigate IDDq failures (1) in order to investigate timing related issues with automated tester equipment. Ishii et al (2) improved the technique and coupled an emission microscope to the tester for functional failure analysis of DRAMs and logic LSIs. Using consecutive step-by-step tester halting coupled to a sensitive emission microscope, one is able detect the failure while it occurs. We will describe a failure analysis case in which marginal design and process variations combined to create contention at certain logic states. Since the failure occurred arbitrarily, the use of the traditional LVP, that requires a stable failure, misled the analysts. Furthermore, even if we used advanced tools as PICA, which was actually designed to locate such failures, we believe that there would have been little chance of observing the failure since the failure appeared only below 1.3V where the PICA tool has diminished photon detection sensitivity. For this case the step-by-step halting technique helped to isolate the failure location after a short round of measurements. With the use of logic simulations, the root cause of the failure was clear once the failing gate was known.

Study on Hazards Identification for the Life Cycle of Household Electric Blankets

2014 ◽  
Vol 968 ◽  
pp. 218-221
Author(s):  
Xia Liu ◽  
Hong Qi Luo ◽  
Rui Fu ◽  
He Liang Song
Keyword(s):  
Life Cycle ◽  
Health And Safety ◽  
Fault Tree Analysis ◽  
Hazard Identification ◽  
Quality And Safety ◽  
Effect Analysis ◽  
Structure Characteristics ◽  
Full Life Cycle ◽  
Working Principle ◽  
Full Life

Household electric blankets are widely used in China, but the problem of quality and safety is also more prominent, which is a serious threat to the health and safety of consumers. The structure characteristics and working principle of household electric blanket are analyzed. The hazards in the each stage of full life cycle are identified, including the stages of designing, manufacturing, packaging, transporting, utilizing and recycling. Hazard identification of each stage is made with methods of scenario analysis, safety check list, fault hypothesis analysis, hazard and operability analysis, failure mode and effect analysis and fault tree analysis, respectively.

Production System Improvement by Integration of FMEA with 5-Whys Analysis

2013 ◽  
Vol 748 ◽  
pp. 1203-1207 ◽  
Author(s):  
Siew Hong Ding ◽  
Nur Amalina Muhammad ◽  
Nur Hanisah Zulkurnaini ◽  
Amanina Nadia Khaider ◽  
Shahru Kamaruddin
Keyword(s):  
Failure Mode ◽  
Rapid Growth ◽  
Production System ◽  
Lower Cost ◽  
Semiconductor Industry ◽  
Drilling Machine ◽  
Effect Analysis ◽  
Marketing Environment ◽  
Root Cause ◽  
System Improvement

With the rapid growth of semiconductor industry, manufacturers are always seeking for improvement to produce better product quality with lower cost in order to survive under competitive marketing environment. However, these matters are easily affected by the failures occurred on the machines. Thus, this paper proposes framework using failure mode and effect analysis (FMEA) with 5-Whys analysis to discover the root cause of the failure furthermore to identify the effective solutions. Drilling machine has been used to justify the practicability of the proposed framework.

scholarly journals Observational Study of Medication Error in Outpatient Pharmacy RSUP Dr. Hasan Sadikin Bandung

2017 ◽  
Vol 15 (2) ◽  
pp. 210
Author(s):  
Viki Hestiarini ◽  
Lia Amalia ◽  
Eni Margayani
Keyword(s):  
Medication Error ◽  
Medication Errors ◽  
Drug Information ◽  
Data Entry ◽  
Care Process ◽  
Analysis Method ◽  
Risk Priority Number ◽  
Effect Analysis ◽  
Root Cause ◽  
Cause Of Failure

Medication error can occur at all stages, starting from prescribing, dispensing and administration of drugs. This study aims to assess the medication errors that occur in the pharmaceutical care process and analyze the cause of failure using the root cause analysis method, to improvement action and decrease the incidence of medication errors. The data were completeness prescription, frequency of dispensing error and completeness of drug information. The number of sample was 1100 prescriptions Prescribing errors were found the potential injury 15.69±11.51% and near missed error 0.5±0.55%. At dispensing stage, occur 427 incidences (9.71%), consist of two incidences (0.04%) for validation assessment regulations, 224 incidences (5.09%) of data entry, 113 incidences (2.57%) of retrieval of drugs, 19 incidences (0.43%) of fi ll in drugs, 69 incidences (1.57%) of fi nal check. At dispensing stage, near missed 330 incidences (7.51%) of near missed and 97 incidences (2.21%) of potential injury. Failure mode and effect analysis calculate of risk priority number, the drug retrieval (RPN 210) and data entry (RPN 126) were analyzed root cause of the analysis for man, material, method, facility and environment.

scholarly journals ANALISIS RISIKO KECELAKAAN KERJA DENGAN METODE FAILURE MODE AND EFFECT ANALYSIS (FMEA) DAN FAULT TREE ANALYSIS (FTA) UNTUK MENURUNKAN TINGKAT RISIKO KECELAKAAN KERJA (PT. BERKAH MIRZA INSANI)

2020 ◽  
Vol 2 (1) ◽  
pp. 48
Author(s):  
Sofian Bastuti
Keyword(s):  
Natural Gas ◽  
Failure Mode ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Pressure Regulator ◽  
Compressed Natural Gas ◽  
Effect Analysis ◽  
Tree Analysis

PT. Berkah Mirza Insani yang bergerak dibidang pengolahan gas alam menjadi Compressed Natural Gas (CNG) dalam setiap pekerjaan nya selalu mengutamakan Keselamatan dan Kesehatan Kerja (K3) . Penelitian ini mengaplikasikan metode Failure Mode and Effect Analysis (FMEA) didapat RPN tertinggi atau di divisi produksi yang mencakup 8 pekerjaan adalah pada Proses dan langkah pensupplyan CNG ke costumer (operasional PRS) dengan nilai severity 5, occurence 3, detection 4 dan RPN 60. Sedangkan Fault Tree Analysis (FTA) didapat faktor penyebab tingkat risiko tertinggi yaitu Proses dan langkah pensupplyan CNG ke costumer (operasional PRS) saat unloading dan operasional CNG dengan potensi bahaya ledakan Pressure Regulator System (PRS).

scholarly journals Quality Improvement for A Shoe Laundry Using Integration Model of Service Blueprint, Failure Mode and Effect Analysis, and Fault Tree Analysis

2018 ◽  
Vol 218 ◽  
pp. 04006
Author(s):  
Natalia Hartono ◽  
Andry M Panjaitan ◽  
Abram Noel
Keyword(s):  
Service Quality ◽  
Failure Mode ◽  
Service Failure ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Integration Model ◽  
Effect Analysis ◽  
Tree Analysis ◽  
Before And After ◽  
Service Blueprint

Nowadays, shoes are not just a casual footwear. Certain shoes can tell the social class of a person. The increase of shoe prices and social status of wearing expensive shoes became a trigger for the development of shoe laundry services. There were a service quality problems in a shoe laundry in Tangerang, Indonesia. Several methods to improve service quality was studied and it is decided to propose a new model, which is integration model of Service Blueprint, Failure Mode and Effect Analysis (FMEA) and Fault Tree Analysis (FTA). The research starts with identifying the problem with observation and interview, then build Service Blueprint. Based on the fail point that has been identified in Service Blueprint, the FMEA used to find which process is the most dominant cause of failure and the most urgent for improvement. The next step is using FTA to find the root cause of the failure of the dominant cause. After analyzing the FTA, the improvement was proposed and implemented. Service failure before and after implementation was compared to see the improvements. There are 6 suggestion and implemented. After the implementation, the error in each process was measured and it is found a decrease in error in each process.

Application of dynamic mesh technology in the oil film flow simulation for hydrostatic bearing

2019 ◽  
Vol 71 (1) ◽  
pp. 146-153
Author(s):  
Yanqin Zhang ◽  
Zhiquan Zhang ◽  
Xiangbin Kong ◽  
Rui Li ◽  
Hui Jiang
Keyword(s):  
Film Thickness ◽  
Flow Velocity ◽  
Manufacturing Industry ◽  
Dynamic Mesh ◽  
Lubricating Oil ◽  
Thickness Variation ◽  
Content Type ◽  
Oil Film ◽  
Rotating Speed ◽  
Hydrostatic Bearing

Purpose The purpose of this paper was to obtain the lubrication characteristics of heavy hydrostatic bearing in heavy equipment manufacturing industry through theoretical analysis and numerical simulation. Design/methodology/approach This paper discusses the influence of oil film thickness variation on velocity field, outlet-L and outlet-R flow velocity under the hydrostatic bearing running in no-load 0 N, load 400 KN, full load 1,500 KN and rotating speeds of 10 r/min, 20 r/min, 30 r/min, 40 r/min, 50 r/min and 60 r/min, by using dynamic mesh technology and FLUENT software. Findings When the working table rotates clockwise, in the change process of oil film thickness, the fluid flow pattern of the lubricating oil at the edge of the sealing oil is the rule of laminar flow, and the oil cavity has a vortex. The outlet-R flow velocity becomes higher and higher by increasing the bearing load and working table speed, and the flow velocity increases with the decrease in oil film thickness; the outlet-L flow velocity increases with the decrease in oil film thickness under low rotating speed (less than 10 r/min) condition and decreases with the decrease of oil film thickness under high rotating speed (more than 60 r/min) condition. Originality/value The influence of the oil film thickness on the flow state distribution of the oil film was analyzed under different working conditions, and the influence rules of oil film thickness on the flow velocity of hydrostatic bearing oil pad was obtained by using dynamic mesh technology.

Engine Failure Experience Improves the Product

2002 ◽  
Author(s):  
Stephen G. Dexter ◽  
Michael W. Rasser
Keyword(s):  
Stress Field ◽  
Design Process ◽  
Great Care ◽  
Critical Question ◽  
Effect Analysis ◽  
Root Cause ◽  
Risk Of Injury ◽  
Engine Failure ◽  
The Cost ◽  
Failure Experience

There are the inevitable occasions when something goes wrong despite the great care taken when engines are designed, built, operated and serviced. Failures can lead at best to some cost and inconvenience or at the worst to a totally destroyed engine. The cost of repairs, followed sometimes by many weeks of down time, can be enormous. In addition there is the critical question of safety and the risk of injury to personnel. By analyzing failures and their causes a lot of experience can be gained and used to the benefit of all. This experience can improve future products. The paper describes some failures which have been experienced by the authors and shows how an analysis of the evidence has identified the root cause. We show how the knowledge gained improves our ability to predict engine behavior and the stress field in the components concerned. The paper goes on to describe what measures can be taken to improve the product and to prevent the circumstances from happening again. The use of Failure Mode and Effect Analysis (FMEA) is described because experience gained from failures can make this an extremely powerful tool when used during the design process.

Sign in / Sign up

Export Citation Format

Share Document