scholarly journals Analysis of Defect and Quality Improvement for O Ring Product Through Applying DMAIC Methodology

Jurnal PASTI ◽  
2019 ◽  
Vol 13 (2) ◽  
pp. 136
Author(s):  
Uly Amrina ◽  
Helmy Firmansyah
Keyword(s):  
Business Strategy ◽  
Control Charts ◽  
Key Factors ◽  
Quality Principles ◽  
Cutting Length ◽  
Product Defect ◽  
Voice Of Customer ◽  
And Control ◽  
The Ideal

To control the quality of a product to meet standards, a reliable measurable technique is needed with the company's business strategy. This research raises case studies identifying quality problems and effective ways of improvement of O Ring products using DMAIC (Define-Measures-Analyse-Improve-Control) quality control methods. Company X found the problem in the form of an average O Ring product defect ratio reaching 1.50% (the company's target is 1.30%). DMAIC is a systematic methodology that focuses on the key factors that control the performance of a process, set it at the best level and keep it at that level. Statistical tools combined with quality principles are applied to each of the DMAIC phases. In the define phase, flowcharts, critical to quality trees, and voice of customer lists are used which produce five types of defects in curing process. In the measure phase, the sigma value combined with pareto diagram are used and shows that the current sigma value is 4,178 with the biggest defect is flow-mark for the O Ring type ZZ00000123. In phase analysis, the root causes of the problem are searched using the why-why analysis and cause-effect diagrams and finds out that the causes are un-sticky rubber tip and unstandardized rubber cutting length. In the improve phase, DOE-based experiments are conducted to get the ideal rubber tip and cutting length conditions. Finally, the work standard is revised in the control phase and monitored by check sheets and control charts. The result of this DMAIC implementation was the O Ring products defect dropped to 0.83% and the sigma value rose to 4,363.Keywords: quality, DMAIC, O Ring, defect, sigma, standard

CONTROLE ESTATÍSTICO DE PROCESSO (CEP) APLICADO NA COLHEITA MECANIZADA DO SORGO

2018 ◽  
Vol 17 (3) ◽  
pp. 490
Author(s):  
JOÃO PAULO BARRETO CUNHA ◽  
MILA SOUZA CASTRO ◽  
ANDERSON GOMIDE COSTA ◽  
MURILO MACHADO DE BARROS ◽  
TULIO ALMEIDA MACHADO ◽  
...  
Keyword(s):  
Process Control ◽  
Statistical Process Control ◽  
Control Charts ◽  
Maximum Level ◽  
Statistical Process ◽  
Forage Sorghum ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
And Control ◽  
The Ideal

RESUMO - A colheita, sendo uma das principais etapas no processo produtivo, precisa manter as perdas dentro de um controle aceitável para que seja possível atingir o máximo nível de qualidade e produtividade. No presente estudo, objetivou-se avaliar as perdas quantitativas durante a colheita mecanizada do sorgo forrageiro por meio do controle estatístico de processo (CEP). O experimento foi arranjado em delineamento inteiramente casualizado (DIC), em que foi realizada a análise de variância para a verificação do efeito significativo da declividade e da velocidade operacional nas perdas, e, quando significativos, foi submetida ao teste de comparação de médias de Tukey a 5% de significância. Cartas sequenciais e cartas de controle para valores individuais e de amplitude móveis foram utilizadas como ferramentas de controle estatístico de processo para verificar o efeito da velocidade operacional nas perdas. Com base nos resultados obtidos é possível indicar que a faixa de velocidade operacional de 4 a 5 km h-1 apresentou a menor variação dos dados, não apresentando nenhum ponto fora do limite de controle, o que lhe conferiu a condição de faixa ideal para colheita. Com base na análise estatística houve maiores perdas no transporte à medida que se aumenta a faixa de declividade do terreno.Palavras-chave: colheita mecanizada, forragicultura, carta de controle, velocidade operacional. STATISTICAL PROCESS CONTROL (SPC) APPLIED IN THE MECHANIZED HARVEST OF SORGHUM  ABSTRACT - Harvesting is one of the main steps in the production process and it is necessary to keep the losses under control in order to reach the maximum level of quality and productivity. The present study aimed to evaluate the quantitative losses during the mechanized harvesting of forage sorghum using the statistical process control (SPC). The experiment was arranged in a completely randomized design (DIC), and analysis of variance was performed to verify the significant effect of declivity and operational velocity on losses, and the significant was submitted to the Tukey test at 5% significance. Sequential charts and control charts for individual and mobile amplitude values, composed of upper and lower control and average limits, were used as statistical process control tools to verify the effect of operational speed on losses. Based on the results obtained it is possible to indicate that the operational velocity range from 4 to 5 km h-1 presented the lowest variation of data, presenting no point outside of the control limit, being the ideal range for harvest. The statistical analysis showed higher losses in transportation as the slope of the terrain increased.Keywords: Mechanized harvesting, forage farming, control charts, operational speeds.

scholarly journals Factors Influencing Outsourcing Services in Iranian Medical Centers: A Systematic Review

2021 ◽  
Author(s):  
Omid Khosravizadeh ◽  
Mohammad Zakaria Kiaei ◽  
Saeed Shahsavari ◽  
Nasibeh Mansouran Tazekand
Keyword(s):  
Decision Making ◽  
Web Of Science ◽  
Decision Makers ◽  
Key Factors ◽  
Medical Centers ◽  
Factors Influencing ◽  
Service Type ◽  
Executive Level ◽  
And Control

Background: Identifying the key factors effective on outsourcing can play a significant role in helping healthcare decision makers to present solutions to improve the outsourcing situation. This study was conducted in order to systematically review the factors influencing the decision making to outsource the services of Iranian medical centers. Methods: Data was collected through searching for keywords in Google Scholar, PubMed, Scopus, Web of Science, Science direct, Magiran, SID and Irandoc databases from January 2010 to December 2020. Also, the quality of the studies was measured and verified by three experts utilizing the Strobe checklist. Researchers classified results achieved by the study. Results: 10 articles were selected that responded to the study's questions. 44 components in seven dimensions including (economic and financial components, components of laws and regulations (legal), components of supervision and control, components of service type, components of executive capability of the organization, components of the external environment of the organization and components human resources) were recognized on the decision to outsource services in medical centers in Iran. Conclusion: olicy makers at the decision-making level and managers at the executive level should consider the efficient components and dimensions before deciding to execute outsourcing in units according to the wanted structure, process and consequences, and then make the needed decision regarding the implementation.  

scholarly journals COLLABORATIVE TRIAL AND QUALITY CONTROL IN CHEMICAL ANALYSIS

2010 ◽  
Vol 2 (3) ◽  
pp. 135-141
Author(s):  
Narsito Narsito
Keyword(s):  
Quality Control ◽  
Chemical Analysis ◽  
Analytical Method ◽  
Control Charts ◽  
Analytical Data ◽  
Control Program ◽  
Quality Parameter ◽  
Quality Control Program ◽  
And Control

Abstract                                                             This paper deals with some practical problems related to the quality of analytical chemical data usually met in practice. Special attention is given to the topic of quality control in analytical chemistry, since analytical data is one of the primary information from which some important scientifically based decision are to be made. The present paper starts with brief description on some fundamental aspects associated with quality of analytical data, such as sources of variation of analytical data, criteria for quality of analytical method, quality assurance in chemical analysis. The assessment of quality parameter for analytical method like the use of standard materials as well as standard methods is given. Concerning with the quality control of analytical data, the use of several techniques, such as control samples and control charts, in monitoring analytical data in quality control program are described qualitatively.  In the final part of this paper, some important remarks for the preparation of collaborative trials, including the evaluation of accuracy and reproducibility of analytical method are also given Keywords: collaborative trials, quality control, analytical data Abstract                                                             This paper deals with some practical problems related to the quality of analytical chemical data usually met in practice. Special attention is given to the topic of quality control in analytical chemistry, since analytical data is one of the primary information from which some important scientifically based decision are to be made. The present paper starts with brief description on some fundamental aspects associated with quality of analytical data, such as sources of variation of analytical data, criteria for quality of analytical method, quality assurance in chemical analysis. The assessment of quality parameter for analytical method like the use of standard materials as well as standard methods is given. Concerning with the quality control of analytical data, the use of several techniques, such as control samples and control charts, in monitoring analytical data in quality control program are described qualitatively.  In the final part of this paper, some important remarks for the preparation of collaborative trials, including the evaluation of accuracy and reproducibility of analytical method are also given Keywords: collaborative trials, quality control, analytical data

scholarly journals An Improved Multipath Routing Scheme using Virtual Network Path Migration

2019 ◽  
Vol 8 (2) ◽  
pp. 635-639
Keyword(s):  
Interactive Media ◽  
Multipath Routing ◽  
Virtual Network ◽  
Optical Systems ◽  
Quality Of Services ◽  
Network Functions ◽  
And Control ◽  
Reproduction Tests ◽  
The Ideal

Virtual Network Functions (VNFs) situation and tying within the sight of physical connection disappointments. A steering convention's duty lie s in deciding the manner in which switches speak with one another so as to advance any sort of bundles from a source to a goal utilizing the ideal way that would give the most proficiency. Continuous basic interactive media requires effective steering for information conveyance with ensured QoS fulfilling the stringent QoS prerequisites of sight and sound transmission for the most part means high vitality utilization. We propose a jump by-bounce dynamic disseminated directing plan for the execution of this system wide enhancement issue. The calculation created in this paper is gives multipath directing, uses every conceivable edge, ensures recuperation from single connection disappointment and accomplishes all these with at most one piece for every bundle as overhead while steering depends on goal address and approaching edge. The proposed calculation designs vitality mindful bunch comprising of one header hub and various part hubs. The Software Defined Networking (SDN) can possibly empower dynamic setup and control for the improved system the executives. This document introduces the plan of a virtualization organizer dependent on system strategy in SDN conditions. The proposed novel directing calculations for diminishing the vitality utilization of optical systems to rest cycle conventions in favor of utilize in the system hubs. Vitality Aware visual system conventions can affect the Quality-of-Services-(QoS), for example, bit-blunder-rate (BER) and postponement. Our reproduction tests demonstrate that way part, way relocation, and tweaked implanting calculations empower a substrate system to fulfill a lot bigger blend of virtual systems

scholarly journals Morphometry of Tabebuia aurea (Manso) Benth. & Hook. f. ex S. Moore subjected to different substrates

Conjecturas ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 134-145
Author(s):  
Maria José de Holanda Leite ◽  
Elenilton Lessa Silva dos Santos ◽  
João Paulo Fernandes de Moraes ◽  
Natália Helena Malta Soares ◽  
Pedro Henrique de Melo Cavalcante ◽  
...  
Keyword(s):  
Dry Matter ◽  
Coconut Fiber ◽  
Plant Ecophysiology ◽  
Lack Of Information ◽  
Content Index ◽  
Number Of Leaves ◽  
Materials Used ◽  
And Control ◽  
The Ideal

The morphometry and quality of seedlings of tree species is of fundamental importance to achieve success in reforestation or commercial exploitation project. Due to the lack of information about the ideal substrate for the production of craibeira seedlings and taking into account the diversification of the use of Tabebuia aurea production of native seedlings for the recovery of degraded areas, this work was conducted with the objective of evaluating the development of seedlings of this species produced with bovine manure and coconut fiber. The present work was carried out at the plant ecophysiology laboratory at the Agrarian Engineering and Sciences Campus (CECA), in Rio Largo, north-region of the state of Alagoas. Four treatments were used, which consisted of a mixture of soil + organic material, in the proportion 3:1. The materials used were tanned bovine manure (ESCB), coconut fiber (CFS) and control (soil). Whose proportions of the treatments were: T1: soil + 0% coconut fiber; T2: soil + 11% coconut fiber; T3: soil + 22% coconut fiber; T4: soil + 33% coconut fiber and T5: soil + 33% cattle manure. Macro and micronutrient analyses of the substrates used were performed. To meet the work objective, the following parameters were evaluated: plant height, stem diameter, number of leaves and leaf dry matter, stem and root and chlorophyll content index. It can be concluded that the substrates chosen for evaluation showed few significant differences in relation to seedling development; the mixture of treatment 2 (soil+coconut fiber 11%) provided a higher percentage of survival and the quality of seedlings were higher; The substrate treatment 4 (soil+coconut fiber 33%) showed much lower results in all evaluated results. However, statistically there were no significant differences in relation to the other treatments and the presence of bovine manure (soil+bovine manure 33%) results in benefits such as greater nutrient supply and possible reduction of seedling costs.

scholarly journals Analyses of Polychlorinated Biphenyls and Chlorinated Pesticides in Biota: Method and Quality Assurance

1999 ◽  
Vol 82 (5) ◽  
pp. 1175-1184 ◽  
Author(s):  
Marianne Cleemann ◽  
Gudrun B Paulsen ◽  
Eva Storr-Hansen ◽  
Arvid Fromberg
Keyword(s):  
Quality Assurance ◽  
Polychlorinated Biphenyls ◽  
Control Charts ◽  
Chlorinated Pesticides ◽  
Control Material ◽  
Relative Standard ◽  
Intercomparison Exercises ◽  
Standard Deviations ◽  
And Control

Abstract An analytical method for polychlorinated biphenyls (PCBs) and chlorinated pesticides in mussels, fish liver, bird liver, and seal blubber is described. Different calibration functions were tested to establish the optimal fit to the nonlinear response of all included compounds. Detection limits and within-batch variations were determined from standard deviations of duplicate analyses of real samples. Within-batch, between-batch, and total relative standard deviations were calculated from regular use of control material. Percentage recovery was estimated by spiking samples with 3 selected PCB congeners and by spiking selected samples with all compounds included in the procedure. Quality assurance is described, covering analysis of about 450 samples divided into 38 batches. Because between-batch variation was twice the within-batch variation, the use of in-house control material and control charts is considered to be mandatory for this type of analyses. Use of certified reference material and regular participation in intercomparison exercises have demonstrated the high quality of the method and the adequacy of the quality assurance applied.

scholarly journals SEVEN TOOLS AS THE PROBLEM SOLVING WAYS T0 IMPROVE QUALITY CONTROL

2021 ◽  
pp. 10-15
Keyword(s):  
Quality Control ◽  
Problem Solving ◽  
Control Charts ◽  
Management Tools ◽  
Quality Improvement Process ◽  
Goods And Services ◽  
Customer Trust ◽  
And Control ◽  
Quality Tools

There are many ways for the company to reach a good standard for their goods and services. Standard is essential to achieve a level of customer trust. The company must be maintaining the quality of their services and products, including in this case the quality of goods beside the services. To ensure its achievement, a directed management system and processes are needed to achieve the level of customer trust. Many companies use quality tools to help monitor and manage their quality system. There are several types of tools that can be used. But the more, there are seven management tools for quality control are the most common. Seven tools can be used by any professional to ease the quality improvement process like flowcharts, check sheets, Pareto diagrams, cause and effect diagrams, histograms, scatter diagrams, and control charts. Key words : seven tools, control, quality, problem solving

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

Boilerplate

2012 ◽  
Author(s):  
Margaret Jane Radin
Keyword(s):  
Economic Efficiency ◽  
Analytical Framework ◽  
Daily Basis ◽  
Regulatory Agencies ◽  
Jury Trial ◽  
Comprehensive Treatment ◽  
New Methods ◽  
And Control ◽  
Fine Print

Boilerplate—the fine-print terms and conditions that we become subject to when we click “I agree” online, rent an apartment, or enter an employment contract, for example—pervades all aspects of our modern lives. On a daily basis, most of us accept boilerplate provisions without realizing that should a dispute arise about a purchased good or service, the nonnegotiable boilerplate terms can deprive us of our right to jury trial and relieve providers of responsibility for harm. Boilerplate is the first comprehensive treatment of the problems posed by the increasing use of these terms, demonstrating how their use has degraded traditional notions of consent, agreement, and contract, and sacrificed core rights whose loss threatens the democratic order. This book examines attempts to justify the use of boilerplate provisions by claiming either that recipients freely consent to them or that economic efficiency demands them, and it finds these justifications wanting. It argues that our courts, legislatures, and regulatory agencies have fallen short in their evaluation and oversight of the use of boilerplate clauses. To improve legal evaluation of boilerplate, the book offers a new analytical framework, one that takes into account the nature of the rights affected, the quality of the recipient's consent, and the extent of the use of these terms. It goes on to offer possibilities for new methods of boilerplate evaluation and control, and concludes by discussing positive steps that NGOs, legislators, regulators, courts, and scholars could take to bring about better practices.

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