scholarly journals Implementasi Metode Overall Equipment Effectiveness Berbasis Six Big Losses Guna Mengevaluasi Efektivitas Mesin Packing Semen

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Septia Priambodo ◽  
Nina Aini Mahbubah
Keyword(s):  
International Standards ◽  
Lower Percentage ◽  
Manufacturing Companies ◽  
Effect Analysis ◽  
Production Delay ◽  
Minor Losses ◽  
Cement Manufacturing ◽  
The Stability ◽  
Fmea Analysis ◽  
Finish Mill

Integrated maintenance management is an important factor in maintaining the stability of machine operations in manufacturing companies. PT AAAA Factory Gresik is a cement manufacturing company, where the Section Division of Gresik Finish Mill Packer Operation has a problem of downtime cement packing machine 40 kg and causes production delay. This study aims to evaluate the effectiveness of the 40kg cement packing machine as well as to calculate losses due to unproductiveness of the packing machine. Overall Equipment Effectiveness (OEE), Six Big Losses, and Failure Mode and Effect Analysis (FMEA) were used as research method. This study found that OEE value for January-December 2019 of 41.25% are considered as lower percentage in compare with the ideal value of international standards which is 85%. Moreover, the largest average losses are found, namely reduce speed losses, idle and stoppages minor losses and defects in process with percentage in following order, 4.49%, 4.49% and 2.76%.Result from FMEA analysis have been identified 3 highest Risk Priority Number (RPN), namely transportation with an RPN value of 294, the second RPN value of 288 is a blockage in the packing machine, finally the engine button is jammed with an RPN value of 252. The proposed improvement scenario is the start of the engine operating operators checking and cleaning machines regularly and the marketing division expands the sales market.

scholarly journals The Measurement and Improvement of Effectiveness in K-440 Haul Truck Using Overall Equipment Effectiveness in Coal Mining Company

2019 ◽  
Vol 10 (2) ◽  
Author(s):  
Shelvy Kurniawan ◽  
Ayesha Azaria ◽  
Talitha Alzena ◽  
Yandri Habib Dwicahyo
Keyword(s):  
International Standards ◽  
Risk Priority Number ◽  
Total Productive Maintenance ◽  
Mining Company ◽  
Effect Analysis ◽  
Fishbone Diagram ◽  
Fmea Analysis ◽  
Brake Lining ◽  
Haul Truck ◽  
Diagram Analysis

The objectives of this study were to determine the effectiveness of K-440 haul trucks based on Overall Equipment Effectiveness (OEE) calculation, to find out the main factors that caused the ineffectiveness of K-440 haul trucks based on fishbone diagram and Failure Mode and Effect Analysis (FMEA), and to analyze the proposed implementation of appropriate improvements to overcome the main problems of K-440 haul trucks. The method used was the mixed method, and the type of research was descriptive. The analysis methods used were OEE, fishbone diagram, and FMEA. The results show that the average effectiveness of the three K-440haul trucks is still far below international standards, which is 44,99%. The material is a significant factor that causes low OEE based on fishbone diagram analysis. There are five problems based on the Risk Priority Number (RPN) critical value from FMEA analysis, namely transmission which is not functioning properly, worn brake lining, unrotated propeller shaft on the shaft, cracked brake drum, and broken spring. Then, the implementation of eight pillars of Total Productive Maintenance (TPM) is proposed in overcoming the main problem of K-440haul trucks. Based on these results, the company needs to implement eight pillars of TPM and carry out OEE calculations regularly.

scholarly journals Analisa Perbaikan Manajemen Perawatan Dengan Metode Reliability Centered Maintenance Bagian Cnc Wirecut di PT X

2021 ◽  
Vol 1 (1) ◽  
pp. 22-30
Author(s):  
Mahmud Iqbal Syam ◽  
Cecep Hadiyan ◽  
Tusmin Hardi
Keyword(s):  
Failure Modes ◽  
Manufacturing Companies ◽  
Maintenance Policy ◽  
Effect Analysis ◽  
Reliability Centered Maintenance ◽  
Machine Reliability ◽  
Defining System ◽  
Engine Failure ◽  
Fmea Analysis ◽  
And Function

PT X is one of the manufacturing companies in Indonesia, which specializes in manufacturing molds and dies which offers products to the internal group and the domestic market. This study discusses the policy analysis of machine repair maintenance management using the RCM (Reliability Centered Maintenance) method approach at the PT X manufacturing company. Some of the problems that occur are sudden engine failure, which will cause over production. One machine that is considered critical is the CNC Wirecut K90 machine. With the application of using RCM it is expected to improve machine reliability through several systematic RCM implementations: system selection and information collection, defining system boundaries, system descriptions and function block diagrams, describing system functions and functional failures, compiling Failure Mode and Effect Analysis (FMEA), composing Logic Tree Analysis (LTA), selection of actions. The new policy set by the Realibility Centered Maintenance (RCM) method consists of 14 failure modes that are resolved by time-directed (CD) and 6 failure modes that are overcome by run to failure (RTF). In the FMEA analysis, there are 4 components that most often fail to function, namely the electrode pin, wire guide, filter and contact fit. The determination of this component is based on the RPN value and data in the field. In the RCM analysis, the electrode pin, wie guide and contact fit components are included in the run to failure (RTF) treatment policy category. Meanwhile, the filter component is in the category of condition direction (CD) maintenance policy with an average failure rate of 29,951 days.

Quality Control of Plastic Cup Products Using Statistical Process Control Methods and Failure Modes and Effect Analysis

2019 ◽  
Vol 7 ◽  
Author(s):  
Kurniawan Eka Rusandi ◽  
Wiwik Sulistiyowati
Keyword(s):  
Quality Control ◽  
Process Control ◽  
Statistical Process Control ◽  
Failure Modes ◽  
Total Production ◽  
Statistical Process ◽  
Effect Analysis ◽  
A Value ◽  
Fmea Analysis ◽  
Cup Products

PT. ICP is a company engaged in manufacturing of packaging, with a wide variety of packaging technologies that fit the needs of the current market share. Among the resulting product is aplastic cup, the results of thermoforming. This research aims to know the main cause of the defect (defect) in a plastic cup products and to reduce product defects in the production process. From the results of the observations made in September 2017 until December 2017 known that the plastic cup products with total production of 63,314,964 pcs to 3,671,341 pcs disability amount. Based on the problems faced by the company efforts on product quality control plastic cup to find the cause of a disability and find solutions for improvement. Proper methods used in the problems that occurred in PT ICP are using Statistical Process Control (SPC) and the method of Failure Mode and Effects Analysis (FMEA). The method is intended to reduce defects in the product and look for the main cause of defect products in a plastic cup. From the results of research conducted has been known that the biggest cause of disability plastic cup is of a rough lip with disabilities amount of 1,346,308 pcs with a cumulative value of 42%. FMEA analysis and the results of that unknown cause rough lip is from wear cutting factor with a value of 224 RPN.

scholarly journals A Novel Hazard Analysis and Risk Assessment Approach for Road Vehicle Functional Safety through Integrating STPA with FMEA

2020 ◽  
Vol 10 (21) ◽  
pp. 7400
Author(s):  
Lei Chen ◽  
Jian Jiao ◽  
Tingdi Zhao
Keyword(s):  
Risk Assessment ◽  
Process Analysis ◽  
Hazard Analysis ◽  
International Standards ◽  
Functional Safety ◽  
Road Vehicles ◽  
Effect Analysis ◽  
Automotive Safety ◽  
Safety Requirements ◽  
Assessment Approach

ISO26262: 2018 is an international functional safety standard for electrical and/or electronic (E/E) systems within road vehicles. It provides appropriate safety requirements for road vehicles to avoid unreasonable residual risk according to automotive safety integrity levels (ASILs) derived from hazard analysis and risk assessment (HARA) required in the ISO26262 concept phase. Systems theoretic process analysis (STPA) seems to be designed specifically to deal with hazard analysis of modern complex systems, but it does not include risk evaluation required by most safety related international standards. So we integrated STPA into Failure Mode and Effect Analysis (FMEA) template to form a new method called system theoretic process analysis based on an FMEA template, STPAFT for shot, which could not only meet all the requirements of the concept phase in ISO26262, but also make full use of the advantages of the two methods. Through the focus of FMEA on low-level components, STPAFT can obtain more detailed causal factors (CFs), which is very helpful for derivation of safety goals (SGs) and the functional safety requirements (FSRs) in the concept phase of ISO26262. The application of STPAFT is described by the case study of fuel level estimation and display system (FLEDS) to show how the concept phase of ISO26262 could be supported by STPAFT.

Software FMEA Analysis for Safety Software

2009 ◽  
Author(s):  
Gee-Yong Park ◽  
Sup Hur ◽  
Dong H. Kim ◽  
Dong Y. Lee ◽  
Kee C. Kwon
Keyword(s):  
Failure Modes ◽  
Block Diagram ◽  
Test Procedure ◽  
Safety Analysis ◽  
Software Safety ◽  
Effect Analysis ◽  
Function Blocks ◽  
Software Code ◽  
Fmea Analysis ◽  
Reactor Protection System

This paper describes a software safety analysis for a software code that is installed at an Automatic Test and Interface Processor (ATIP) in a digital reactor protection system. For the ATIP software safety analysis, an overall safety analysis is at first performed over the ATIP software architecture and modules, and then a detailed safety analysis based on the software FMEA (Failure Modes and Effect Analysis) method is applied to the ATIP program. For an efficient analysis, the software FMEA is carried out based on the so-called failure-mode template extracted from the function blocks used in the function block diagram (FBD) for the ATIP software. The software safety analysis by the software FMEA, being applied to the ATIP software code which has been integrated and passed through a very rigorous system test procedure, is proven to be able to provide very valuable results (i.e., software defects) which could not be identified during various system tests.

The effect of changes in scale on ship and semi-submersible design

1978 ◽  
Vol 76 (1-3) ◽  
pp. 153-180
Author(s):  
N. S. Miller ◽  
P. M. F. M. De Souza
Keyword(s):  
Lower Percentage ◽  
Hydrodynamic Drag ◽  
Design Practice ◽  
Changing Scale ◽  
Design Changes ◽  
Breadth Ratio ◽  
Steel Weight ◽  
The Stability ◽  
Floating Platforms

SynopsisThe effects of changing scale on ships and semi-submersibles are explored in this paper. In the early part attention is drawn to the wide differences in design practice which exist for large ships with, in particular, a tendency for a lower length to breadth ratio as size is increased. Theoretical reasons for this are given, the principal ones being that this leads to a reduction in steel weight per ton displacement without any large increase in power. It is suggested that this tendency will continue until the weight of the transverse material in the hull approaches that of the longitudinal material. Many other characteristics of the ships improve with lower L/B ratios but manoeuvrability declines and in order to reap the benefit of low L/B designs greater research should be applied to improving this aspect of large ships.Much greater flexibility in design exists for semi-submersibles since there are no draft restrictions. The paper examines the effects of geometric variations in semi-submersibles and concludes that the stability, dynamic motions and wind and hydrodynamic drag all improve with increasing size but that structural steel weight may not be a significantly lower percentage of the displacement unless design changes are made with changing scale. Attention is drawn to the big improvements in rolling (pitching) performance which would enable large floating platforms to have a very low level of motion. This could have great significance for the siting of petrochemical and other plants at sea.

scholarly journals An Integrated Decision-Making Approach for Cause-And-Effect Analysis of Sustainable Manufacturing Indicators

2020 ◽  
Vol 12 (4) ◽  
pp. 1517
Author(s):  
Neeraj Bhanot ◽  
Fahham Hasan Qaiser ◽  
Mohammed Alkahtani ◽  
Ateekh Ur Rehman
Keyword(s):  
Decision Making ◽  
Structural Equation ◽  
Quantitative Methods ◽  
Manufacturing Sector ◽  
Sustainable Manufacturing ◽  
Manufacturing Companies ◽  
Effect Analysis ◽  
Final Cause ◽  
Cause And Effect ◽  
Cause And Effect Analysis

Sustainability is a growing concern for manufacturing companies, as they are major contributors to pollution and consume a substantial portion of the world´s natural resources. Sustainable manufacturing can reduce waste, conserve energy and increase resource efficiency. However, one of the main challenges facing manufacturing organisations to put sustainability into practice is the lack of understanding of the cause-and-effect relationships between critical indicators of sustainable manufacturing. To overcome this challenge, a novel, rigorous and integrated framework, composed of four quantitative methods, is proposed to analyse critical indicators of sustainable manufacturing. The analysis is based on responses from both academic and industry experts. These four methods including DEMATEL (decision-making trial and evaluation laboratory), the MMDE (maximum mean de-entropy) algorithm, ISM (interpretive structural modelling) and SEM (structural equation modelling) are uniquely integrated to present statistically validated relationships between critical indicators using information on varying degrees of relationship between them. The final cause-and-effect models for the respondent groups (i.e., researchers and industry experts) are further validated through gathering the viewpoints of a researcher and an industry practitioner for its robustness. The novelty of our research lies in: (1) proposing a novel and integrated rigorous quantitative framework combined with qualitative research method; (2) applying the proposed framework to analyse contextual relationships between critical indicators of implementing sustainability, in the manufacturing sector as a whole, which to the best of authors’ knowledge is the first of its kind; and (3) comparing and contrasting results of researchers and industry practitioners’ groups along with a check of their validation and robustness.

scholarly journals Variable Structure Control of Engine Idle Speed With Estimation of Unmeasurable Disturbances

2000 ◽  
Vol 122 (4) ◽  
pp. 599-603 ◽  
Author(s):  
A. Stotsky ◽  
B. Egardt ◽  
S. Eriksson
Keyword(s):  
Engine Speed ◽  
Main Tool ◽  
Variable Structure ◽  
Time Varying ◽  
Idle Speed ◽  
Structure Control ◽  
Lyapunov Function Method ◽  
Production Delay ◽  
The Stability ◽  
Disturbance Estimator

A new controller for throttle and spark advance to control the engine speed at idle under unknown time varying disturbances is proposed in this paper. By using measurements of the engine speed the disturbance estimator is designed to reconstruct a disturbance torque. The controller is formulated so that the throttle is used as much as possible as a main tool to produce a torque and spark advance is used to compensate intake to torque production delay. The stability of the system is proved via Lyapunov function method. [S0022-0434(00)01304-6]

scholarly journals Analisis Penyebab Kerusakan Hot Rooler Table dengan Menggunakan Metode Failure Mode And Effect Analysis (FMEA)

2018 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Muhamad Bob Anthony
Keyword(s):  
Failure Mode ◽  
Section Mill ◽  
Effect Analysis ◽  
Iron And Steel ◽  
Furnace Section ◽  
Human Aspects ◽  
Process Failure ◽  
Mill Unit ◽  
Fmea Method ◽  
Fmea Analysis

This research was conducted in an international company engaged in iron and steel products manufacturing industries. One of the equipment that is often damaged is a hot roller table machine in the furnace section mill unit. The availability results obtained in hot roller table equipment is 96.571% and is still below the company standard which is set at 98%. Therefore, we need an analysis of the root causes of the problem and search for the best solution to fix the existing problem by applying the method of Failure Mode and Effect Analysis (FMEA). FMEA is a method that can systematically and structurally analyze and identify the consequences of a system or process failure, and also reduce or analyze the probability of failure. The purpose of this study is to identify and analyze the level of damage and its causes with the application of the FMEA method. Based on the pareto diagram the damage to the hot roller table machine, it was found that the highest frequency of damage was in the rotary coupling with a down time percentage of 26.9%. From the FMEA Analysis, two components that have very high RPN values are categorized as potential severit i.e. bearing as the first with an RPN value of 392 and the second is a seal ring with an RPN value of 294. The two components are the main priority for repair of the furnace section. mill, especially for machine and human aspects.

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