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Dissertations / Theses on the topic 'Bar charts'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 January 2023

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1

Silverlycke, Peter. "Vidareutveckling av grafkomponent." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-23318.

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Rapporten täcker vidareutvecklingen av en grafkomponent som från början kunde visa linjediagram med datapunkter bestående av reella tal. Grafkomponenten var en del av programvaran Tunnel Manager som är utvecklad av Sogeti till Atlas Copco. Tunnel Manager används i kombination med Atlas Copcos borrigg Boomer. Grafkomponenten utvidgades med stapeldiagram med flera serier, stapeldiagram med adderade serier och med cirkeldiagram. Den utvidgades även med nya datapunktstyper i form av datum och tid. Även gruppering av data för stapeldiagram lades till. Utökad information visades också när muspekaren

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Harvey, Martha M. (Martha Mattern). "The Fixed v. Variable Sampling Interval Shewhart X-Bar Control Chart in the Presence of Positively Autocorrelated Data." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc278763/.

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This study uses simulation to examine differences between fixed sampling interval (FSI) and variable sampling interval (VSI) Shewhart X-bar control charts for processes that produce positively autocorrelated data. The influence of sample size (1 and 5), autocorrelation parameter, shift in process mean, and length of time between samples is investigated by comparing average time (ATS) and average number of samples (ANSS) to produce an out of control signal for FSI and VSI Shewhart X-bar charts. These comparisons are conducted in two ways: control chart limits pre-set at ±3σ_x / √n and limits co

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Nam, Kyungdoo T. "A Heuristic Procedure for Specifying Parameters in Neural Network Models for Shewhart X-bar Control Chart Applications." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc278815/.

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This study develops a heuristic procedure for specifying parameters for a neural network configuration (learning rate, momentum, and the number of neurons in a single hidden layer) in Shewhart X-bar control chart applications. Also, this study examines the replicability of the neural network solution when the neural network is retrained several times with different initial weights.

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4

Kimura, Erin A. "RELIABILITY ANALYSIS OF LOW-SILVER BGA SOLDER JOINTS USING FOUR FAILURE CRITERIA." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/867.

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The appropriate selection of failure criterion for solder joint studies is necessary to correctly estimate reliability life. The objective of this study is to compare the effect of different failure criteria on the reliability life estimation. The four failure criteria in this study are a 20% resistance increase defined in the IPC-9701A standard, a resistance beyond 500 Ω, an infinite resistance (hard open), and a failure criterion based on X-bar and R control charts. Accelerated thermal cycling conditions of a low-silver BGA study included 0°C to 100 °C with ten minute dwell times and -40°C t

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Castro, Juscileide Braga de. "A utilizaÃÃo de objetos de aprendizagem para a compreensÃo e construÃÃo de grÃficos estatÃsticos." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9541.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>O tratamento da informaÃÃo Ã importante para a formaÃÃo do cidadÃo, pois estamos cercados de dados e fatos que precisam ser compreendidos. Contudo, avaliaÃÃes recentes do Sistema de AvaliaÃÃo da EducaÃÃo BÃsica (SAEB) e do Instituto Nacional de Alfabetismo Funcional (INAF) indicam as dificuldades de estudantes e atÃ de adultos das diversas regiÃes do paÃs, apresentam no entendimento da representaÃÃo de dados em grÃficos e em tabelas e em compreender os conceitos matemÃticos envolvidos. Pesquisas revelam que o estudo de grÃficos atr

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Evans, Dakota C. "A THEORETICAL ADAPTIVE AUTONOMY MODEL:REAL-TIME PHYSIOLOGICAL ASSESSMENT OF COGNITIVE WORKLOAD." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1421080260.

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7

Melzacka, Wiktoria Anna, and Ning Jiang. "Måttlistans påverkan på passform : En undersökning av sambandet mellan mått och passform på overall för barn." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-26572.

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Studien görs i samarbete med ett företag som jobbar med bl a. barnoveraller. Företaget gör ingen egen mönsterkonstruktion, utan köper denna tjänst av leverantören. Materialet leverantören får av företaget är en måttlista, men när olika leverantörer sytt upp prover åt dem har de fått varierande passform, trots att overallerna hållit samma mått. Författarna har därför jobbat på ett sätt att systematisera måttlistan för att kunna reproducera den aktuella passformen. Detta har gjorts genom att försöka återskapa företagets overall med hjälp av måttlistan och därefter utvärderat vad som skulle göra

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Wolf, Aaron B. "Determining Whether Spectrophotometer CIE L*a*b* Color Analysis is an Effective Alternative to Munsell Soil Color Charts for the Study of Burnt Bones: Insights From Analysis of Bab edh-Dhra EB II-III Burnt Bones." Oberlin College Honors Theses / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1305140303.

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9

Andersson, Charlotte, and Mahmoud Sherzad. "Kan en visualisering av studerad tid öka studiemotivationen hos en högskolestudent?" Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279820.

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Det som ska undersökas i denna fallstudie är ifall visualisering av studerad tid kan öka motivationen hos en högskolestudent att studera på högskola. I denna uppsats definieras studietillfällen som schemalagda föreläsningar och övningar, eller självorganiserade studiepass. Kopplingen mellan motivation och visualisering av tid lagt på träning i gym har tidigare undersökts. Vi bygger vidare på det och undersöker ifall det finns ett liknande samband med mängden tid nedlagd på studier och motivationen att studera vid högre utbildning. Frågan är av intresse för främst utvecklare av lärplattformar,

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Pradier, Aline. "Evaluation des champs électromagnétiques induits dans les tissus biologiques pour les nouveaux usages et les nouvelles technologies sans fil." Paris 6, 2006. http://www.theses.fr/2006PA066545.

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Ce manuscrit présente une analyse des champs électromagnétiques induits dans les tissus biologiques par les nouveaux usages en télécommunication ainsi que les nouvelles technologies du type UWB. Pour les nouveaux usages, les terminaux se trouvent de plus en plus proches du buste. Ce positionnement doit être pris en compte par les normes. La composition du buste est différente d'une personne à l'autre. Pour cela une étude sur l'influence de la puissance absorbée en fonction de la composition de la personne est menée. Cette étude servira à déterminer un facteur correctif pour valider l'utilisati

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Mayerbergová, Ilona. "Studie operativního řízení výroby." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2012. http://www.nusl.cz/ntk/nusl-223462.

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The goal of this diploma thesis is to use the principles of lean manufacturing to lean workplace and eliminate all forms of waste in this workplace. A part of this work is opti-mal design of the workplace in terms of ergonomics which should have a positive effect on shortening lead time and process cycle efficiency. Shortening the lead time will allow company to respond more quickly to customer requirements and this effect may subsequently lead to the drop in inventories.

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Lång, Petronella, and Martin Liedholm. "E-handel eller fysisk handel - det handlar bara om handel. : En kvalitativ studie om hur detaljhandelsföretag kan skapa en enhetlig upplevelse genom implementering av en omnikanalstrategi." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-86051.

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Detaljhandeln har förändrats i och med digitaliseringens framfart. Teknikens utveckling tillsammans med en större andel uppkopplade konsumenter innebär nya försäljnings- och marknadsföringskanaler för detaljhandlare. Detta har medfört att detaljhandelsföretag ställs inför krav av att integrera de olika kanalerna med varandra vilket inom forskningen benämns som en omnikanalstrategi. Syftet med studien har varit att, ur ett företagsperspektiv, undersöka hur svenska detaljhandelskedjor arbetar med att integrera digitala och fysiska försäljnings- och marknadsföringskanaler. Detta för att erhålla

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Chen, Yan-kwang, and 陳彥匡. "A Fuzzy Diagnosis system for X-bar control charts." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/01894042452244472213.

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博士<br>國立交通大學<br>工業工程與管理系<br>88<br>In this dissertation, a control chart based diagnosis system has been developed to assist operators in monitoring whether or not a process is under control. When a process is becoming unstable, the system will give an alarm signal and justify the possible causes of instability. By removing the root cause of instability, the process can be improved. The diagnosis procedure in the system includes two phases: (1) to calculate the relationships between observations and predefined unnatural symptoms. (2) According to the relationships mentioned above and

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Lee, Pei-Hsi, and 李佩熹. "The design of double sampling X-bar control charts." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/59739600046830018922.

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博士<br>雲林科技大學<br>工業工程博士班<br>97<br>Double sampling X-bar control chart (DS X-bar control chart) which is a Shewhart type control chart can reduce sample size and detect small process shift fast. In process monitoring of real industry, the process observations may be interdependent and correlated or violate the normality assumption. An original design of DS X-bar control chart will have higher error probabilities in these type processes. In this study, an economic design model and a statistical design model of DS X-bar control chart for correlated and non-normal data are respectively developed fo

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Liao, Huang-Sheng, and 廖皇盛. "Design of Double Sampling X-bar Control Charts for Correlated Data." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/76124847807755557903.

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碩士<br>雲林科技大學<br>工業工程與管理研究所碩士班<br>96<br>When the process variance occurred, quickly detecting out the process variance can effectively reduce the occurrence of defective products. Double sampling (DS) X-bar control chart can quickly detect the mean shift under using the fewer sample size and reduce the inspection time and cost. In the real process, the observation values of the sample usually occur the correlation. When the correlation had occurred, the type Ι error probability of control charts will increase. In this study, we construct a statistical design model of DS X-bar control chart for

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Lai, Zhi Zhong, and 賴致中. "The Economic Design of x-bar Control Charts under Preventive Maintenance." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/58213805254857418975.

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碩士<br>大葉大學<br>工業工程與科技管理學系<br>96<br>The economic design of traditional x-bar control charts generally takes less consideration of preventive maintenance. While some economic design of x-bar control charts when considering the preventive maintenance conducts a preventive maintenance at each sampling. Based on Duncan’s (1956) economic design mode, this study assumed that preventive maintenance is carried out only when the sample statistics falls into the scope between the warning and the action limits to reduce unnecessary maintenance action to establish the economic model of x-bar control charts

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Liao, Nai-Yi, and 廖乃毅. "The economical-statistical design of double sampling X-bar control charts." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/58423738517293552526.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>95<br>As today’s manufacturing firms are moving towards agile manufacturing, a fast and economical on-line statistical process control solution is in high demand. Multiple sampling control charts are such an alternative. One successful application of the multiple-sampling control charts is the use of a double sampling (DS) control chart in replacement of traditional control charts for on-line statistical process control in industries. A DS chart is quicker and more sensitive than the traditional Shewhart chart in detecting the mean shift in a process.

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Huang, Jih-Hung, and 黃日宏. "Shewhart X-Bar Control Charts to Monitor Characteristic Life of Multiply-Censored Data." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/46128162332507602755.

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碩士<br>國立雲林科技大學<br>工業工程與管理系<br>104<br>In the industrial products often do life test, life test usually care about the average change in manufacturing process, consider the time and cost, often using censored data. Control chart is a good tool monitor the process. But Steiner & Mackay (2000,2001) proposed using traditional control charts monitor censored data, the occurrence of adverse characteristics such as large-alarm rate and low power, therefore right-censored data assumes a life is Normal distribution and Weibull distribution proposed methods to monitor the average change in the process, t

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Chung, Chiu-hua, and 鍾佳樺. "The Economic Design of VSSI X-Bar Control Charts under a Preventive Maintenance Policy." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/94318792031450361449.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>92<br>As the automatic society will come, the rate of utilization of the machinery is raised, carry out proper preventive maintenance that can maintain the quality of the products and lower costs. Increase with machinery service time, the process will deteriorate that having an increasing hazard rate due to wearing and tearing. This study proposes an economic design model of variable sample size and sampling interval x-bar chart with considering preventive maintenance policy. The computational results indicate that the proposed model can detect assignable c

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Chiu, Shih-Chen, and 邱士珍. "Economical design of X-bar control charts under the mean shift and variance increasing." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/n46em2.

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碩士<br>國立屏東科技大學<br>工業管理系所<br>105<br>Dr. Duncan put forward economical Design of X-bar Control Charts in 1956. This model only considers the mean shift. However, the variation increasing in the process can also possibly occur. Therefore, this study makes the discussion in view of this part and the Duncan’s model was extended. Through the Visual Basic software to carry on a computerized system development and design that optimizes the quality control chart. Apart from considering the mean shift, the variance increases influences on sample size, interval between samples and width of control limits

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Chang, Ming-Lun, and 張銘倫. "A Study of Applying Genetic Algorithm to the Economic Design of X-bar Control Charts." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/20747193413457056969.

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碩士<br>大葉大學<br>工業工程與科技管理學系<br>96<br>Duncan is the pioneer of the economic design of control charts. One of the main difficulties issues in economic design is the computation of the design parameters. Several different methods have been proposed. In this research, an algorithm of Genetic method is employed to determine the parameters of an X-bar control chart in Duncan’s model. Numerical examples show that this is an accurate and reliable optimum values for the design parameters.

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Ho, Ming-Han, and 何明翰. "The Economic Design of X-bar Control Charts under Preventive Maintenance and Taguchi Loss Function." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/51861349957369789555.

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碩士<br>大葉大學<br>工業工程與科技管理學系<br>96<br>Quality is one of the important indicators of enterprise competitiveness. Reaching a balance between low costs and high quality is a key to the success of an enterprise. Sampling and inspection are conducted during the production process to monitor the product quality in manufacturing process. However, the coming of automated production has gradually increased the plant utilization rate. The failure rate of machines will increase in the manufacturing process due to increased working time. If preventive maintenance can be carried out in proper time, the defici

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Lee, Ming-Chia, and 李明家. "Economic-Statistical Design of X-bar Control Charts with Multiple Assignable Causes using Taguchi's Loss Function." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/47256908897864380426.

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碩士<br>國立交通大學<br>工業工程與管理學系<br>100<br>Control Chart is one of the most important tools in statistical process control (SPC). Among many types of control charts, the most often used one is X bar chart. When using X bar chart, the values of sample size(n), sampling interval(h) and coefficient of control limit(k) must be determined. Some studies have developed the economic design and economic-statistical of X bar chart with multiple assignable causes in the process. The economic design or economic-statistical design can determine the optimal values of (n, h, k) with lowest cost. However, these meth

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Tsai, Hsuan-Chun, and 蔡炫君. "The Economic Design of X-Bar Control Charts under a Preventive Maintenance Policy for Multiple Assignable Causes." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/65917591439833959304.

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碩士<br>華梵大學<br>工業管理學系碩士班<br>87<br>Traditional design of control chart is based on data which is assumed to be independent identical normal distribution and the occurrence time of an assignable cause follows an exponential distribution. However, this assumption is frequently unpractical. Thus we wish to modify the traditional economic design model, to make the model more consistent with real situation. In this thesis, we study that the occurrences of assignable causes are according to general distribution and its failure rate is increasing. After sampling, we assumed that if the proce

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Chen, Chia-Ping, and 陳佳平. "The Economic-Statistical Design of Double SamplingX-bar Control Charts Combine Quality Loss Function for Correlated Data." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/19615440356369425148.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>101<br>Shewhart x-bar control chart has been generally used by enterprise. Daudin(1992) propose Double sampling x-bar control chart effectively reducing the sampling number. In recent years, the production of some enterprise is not follow independence. It’s existence related. The research joint the correlated data concept in the control chart, and find out the statistical optimal solution. Although it can upgrade the monitoring capacity, but the cost will rise with the monitoring capacity. In this study, economic design propose by Lorenzen&;Vance(1986) and th

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Chen, Yi-Chun, and 陳易群. "Economical Statistical Design of Combined Double Sampling and Variable Sampling Interval Joint X-bar and S Control Charts." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/39921777903222805107.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>101<br>In recent years, manufacturers and consumers are more attention to the relationship between the ''quality'' and "costs". The control charts is the most commonly used methods of quality management on Statistical Process Control (SPC). The Shewart Dr. (1924) development the average control chart, by the average number of process monitoring process, but it was not sensitive to the detection process small shift. Later, many researchers design adaptive control charts to improve it, the adaptive control charts adjust to sampling size (n),

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Li, Chia-Ju, and 李嘉茹. "A Study of X-bar Control Charts Design with Non-normally Data for Optimizing Cost and Monitoring Efficiency." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/jh2k42.

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碩士<br>國立虎尾科技大學<br>工業工程與管理研究所<br>95<br>Traditionally, when the issue of designing control chart is discussed, one usually assumes the observations in each sampled subgroup are normally distributed; therefore, the sample mean is also normally distributed. Even if the size of subgroup is large enough, the observations will be distributed normally according to the central limit theorem. However, the assumption may not be acceptable in practice. In this research, an economic-statistical design of X-bar chart with warning limit under Non-normal distributions will be developed using the Burr distrib

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Yeh, Li-Lun, and 葉立綸. "Economic and Economic-Statistical Designs of X-bar Control Charts under Non-Exponential Failure Mechanisms and Non-normal Data." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/10242734514928735642.

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博士<br>國立清華大學<br>工業工程與工程管理學系<br>97<br>Statistical approaches have recently been used to solve industrial process control problems. In particular, the control chart technique, developed using a statistical theory by Dr. Shewhart in 1924, is a well-known statistical method and is widely applied to monitor the variance of a manufacturing process, such that it can ensure that the quality of products is consistent with the expectations of customers. Traditionally, when an economic model is applied to determine the parameters of control charts, it is assumed that the occurrence of an assignable c

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Yang, Yen Chun, and 楊衍春. "Taguchi''s Loss Function in the Economic Design of the X-bar Control Charts- Under the Weibull Shock Models." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/50521794148875778721.

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碩士<br>元智大學<br>工業工程研究所<br>88<br>In this article, a modified Duncan''s (1956) model with Taguchi''s loss function for the economic design of control charts is extended to deal with situations involving the Weibull shock model. When the process failure mechanism follows a Weibull model, it may derive the variable sampling interval decreased with the age of the system. This article is also considered external failure cost and internal failure cost in the cost model. We hope that this article can help the enterprise to choose the 3 design parameters for their control chart from economi

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Lin, Hung —. Chia, and 林宏嘉. "Revised X-bar Control Chart." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/p6dv4s.

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碩士<br>淡江大學<br>統計學系<br>91<br>This paper presents two approaches for constructing control limits of X-bar control chart that can enable the user to begin monitoring the process mean at an earlier stage than the standard approaches. The proposed control limits can be constructed easily and are closed to any specific percentile of run length distribution of the true limits, even when only a few initial subgroups are available. Performances of the proposed approaches are studied by Monte Carlo simulation. The simulation results show that the proposed control limits perform similarly to the true li

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Hsu, Shih-Hsueh, and 徐仕學. "Moving weight average X-bar control chart with variable sampling intervals." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/10866655187044317525.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>94<br>Reynolds[1998] proposed the standard X-bar control chart with variable sampling intervals (STD VSI X-bar) which is an effective monitoring method. If the newest sample mean falls in the warning region, a short sampling interval is used in the next sampling, whereas a long sampling interval is used. However, compared to other adaptive X-bar control charts, STD VSI X-bar is insensitive to the moderate and small process shift. The reason is that the switching rule of STD VSI X-bar only refers to the newest sample mean to choose the sampling interval. In or

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Hung, Pei-Yi, and 洪蓓怡. "Economic Design of Variable Sampling Intervals X-bar and R Control Chart." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/52198354504910617532.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>92<br>The control chart makes the monitoring in process stability to reduce defective production and it can use to estimate process parameters. Then through these messages to determine process production or provide effective information in process improvement, so the control chart is a good tool to solve question and improve quality. The process control must simultaneously maintain the process mean and the process variation, so can help the performers to understand the actual condition about entire process, therefore, in this paper, we uses X-bar and R contr

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Liou, Jia-Hueng, and 劉家宏. "Non-Normality of the Joint Economic Design of X-bar and R Control Chart." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/24656584001280333879.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所<br>87<br>Since Duncan’s pioneering work in economically design of X-bar control chart, there were a lot of works toward economically design of different control charts. Saniga who is the first person proposed joint economically optimal design of X-bar and R control chart in 1977. In his research, the quality characteristic is assumed to be normally distributed. But there are cases to have quality characteristic that is not normally distributed in practice. In this research, the Burr distribution is used to represent the distribution of the quality characteristi

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Hung, Shih-Han, and 洪士涵. "A study of Detecting the Autocorrelated Process by Variable Parameters x-bar Control Chart." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/59392960850452646675.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>95<br>The traditional statistic process control uses the independent and normal data to determine whether the process has any anomalism situation. It will cause the increase of the false rate of control chart if we use the traditional independent control chart to detect the process. So it is an important issue about how to use the control chart to detect the process effectively when the autocorrelated exists in the process. So this study discusses all the control parameters and investigates the performance of the variable control parameters be used for detect

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Lin, Kung-Hong, and 林昆宏. "Non-Normality of the Joint Economic Design of X-bar and S Control Chart." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/56180967728341392283.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>91<br>Traditionally, observations characteristic is assumed to be normally distributed when control chart is applied for statistic process control. If observations value is not normally distributed, the traditional methods of design about the control chart probably reduce the ability that control chart detects non-chance cause. In according to Burr distribution, Hooke and Jeeves optimal searching rule and the skill of computer simulation, this research develops the joint economic design model of X-bar and S control chart under non-normally distributed. The

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Wu, Cheng-Ming, and 吳政旻. "The Economic Design of Variable Sampling Interval X-bar Control Chart Under Non-normality." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/54295612648584992293.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>90<br>This research proposed an economic design of VSI (Variable Sampling Interval) X-bar control chart considering non-normally distributed process data. And the sensitivity analysis of those cost and process factors of c1(average cost of searching false alarm), c2(average cost of detecting and eliminating assignable cause), c5(the fixed cost of using control chart), c6(the variable cost of using control chart), g(expected time for every sample to sample, inspect and explain), D(time to search the assignable cause and repair the manufacturing process),δ(coe

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Lin, Wei-Jhih, and 林韋志. "Improving Fuzzy Statistical Clustering Approach for Estimating the Change in X-bar Control Chart." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/56505966107521144969.

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碩士<br>國立雲林科技大學<br>工業工程與管理系<br>103<br>Statistical process control (SPC) charts are typically employed to monitor a process shift. If an out-of-control signal occurs in a SPC chart, engineers have to identity the cause and remove it. The method of identity the real time change is knows a change-point estimation problem. In practice, the shift type of a process is uncertain. Engineers need to identify the shift type. When the shift type is a step change, using a linear estimator results an inaccurate estimation. Similarly, if there exists a linear trend change type, using a step estimator yields

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Jun-Ying, Guo, and 郭俊映. "Economic Design of X-bar Chart for Dual Sampling Intervals and Dual Sample Policy." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/75362003680112708619.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所<br>86<br>This research modifies Reynolds''s(1996) dual sampling intervals policy by dual sampling intervals and dual sample sizes and adopt Duncan''s(1956) economic design of X-bar control model to develop an economic design of X-bar control chart with dual sampling intervals and dual sample size policy. The Genetic Algorithms procedure is employed for searching the optimal or near optimal solution of those economic design parameters of X-bar chart with dual sampling intervals and dual sample sizes policy. This study found that:1.the economic model of this researc

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Yi-RuJhuo and 卓怡如. "Setting Control Limits of X-bar Control Chart Subjected to Short-term Human Resources." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/2jh56g.

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Liao, Li-Fang, and 廖莉芳. "Economical statistical design of combined double sampling and variable sampling interval X-bar control chart." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/53662480514364252113.

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碩士<br>雲林科技大學<br>工業工程與管理研究所碩士班<br>96<br>Control charting is applied to monitor the process in manufacturing industry. The traditional Shewhart control is used widely for the process mean. It is sensitive to find an assignable cause for larger shift, but it is not for smaller shift. Then, the DSVSI control chart is proposed. It can not only improve the performance of the Shewhart control chart but also find an assignable cause quickly. In addition, it is very important to think of the cost of manufacturing product. Some researchers consider pursuing lower cost invariably may cause higher false a

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Chang, Heng-Chih, and 張恆誌. "Joint Economic Design of Variable Sampling Sizes and Intervals X-bar and R Control Chart." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/84552019306846324786.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>93<br>The purpose of the control chart is monitoring process to reduce defective production. If only one control chart is used to monitor the process, the power is usually worse than joint two control charts simultaneously. The process control must monitor the process mean and the process variation simultaneously to reveal the actual situation about the process. The variable sample sizes and sampling intervals (VSSI) control chart proposed by Costa in 1999 has proved that its ability in detecting the change of process is better than traditional fixed sample

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Chang, Ya-Ting, and 張雅婷. "Applying Non-parametric Bootstrap Method to Construct x-bar Control Chart for Burr Distribution process." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/k699pq.

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碩士<br>國立交通大學<br>工業工程與管理系所<br>104<br>The conventional x-bar control chart is usually utilized to analyze or monitor the process mean under the assumption that the process data are independent and follow a normal distribution. However, the probability of committing Type I and Type II errors will increase if the process data follow a non-normal distributions and the control chart will lose the ability of detecting process variation correctly. Bootstrap method is introduced by Efron in 1979. The simulated data can be obtained without any assumption of the underlying distribution. Although some stu

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Hong-Yong, Chang, and 張弘勇. "Application of Multi-Objective Programming for Economic Design of Double Sampling X bar Control Chart." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/47541934624111491971.

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碩士<br>國立雲林科技大學<br>工業工程與管理系<br>102<br>Statistical process control (SPC) is an important tool of improvement in the quality management. Control charts are widely used for improve quality. However, there are many competitors in industrial. Therefore quality difference was not significant. If enterprises or factories could decrease the cost would create more benefit. Duncan developed the design of economic applied for X bar control chart first. And setting minimization cost as the objective of economic in his model. Actual, enterprises or industries would not consider single objective only, it mig

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Lin, Jhe-wei, and 林哲暐. "Economic Design of Variable Sampling Interval X-bar Control Chart by Using Taguchi Loss Function." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/82481332664850965705.

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碩士<br>國立臺灣科技大學<br>工業管理系<br>96<br>Control charts are essential in statistical process control and it is widely used to detect changes in process shifts. A conventional practice is to use a sample of size 4 or 5, three sigma control limits, and the sampling interval is decided by quality engineer. Although it is easier to carry out in practice, it may not be economic. Duncan first proposed an economic model to determine the parameters of control charts in 1956. Thereafter, many researches focus on economically-based control charts, virtually all of which references Duncan. This study proposes a

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Kai-ChunChang and 張凱鈞. "An Economic Design of Adaptive X-bar Control Chart Subjected to Short-term Manpower Shortage." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/qxf6h4.

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Yit-Ming, Yang, and 楊義明. "The Design of X-bar Control Chart from Economic Viewpoint--With a Weibull Distributed Failure Mechanism." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/97103914561015281118.

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博士<br>元智大學<br>工業工程研究所<br>89<br>Abstract We consider an economic design of control charts with a Weibull distributed process failure mechanism in a process when there are possible single assignable cause or multiple assignable causes。There are three different topics considered in this thesis: (1) economic design of control charts in a discrete part process，(2) economic design of control charts in a continuous flow process，and (3) economic design of single observation in a moving average control chart。When the process failure mechanism follows a Weibull model having a increasing f

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Zahara, Erwie, and 何怡偉. "The economic design of the X-bar control chart under consideration of costs due to process losses." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/25471288808008253368.

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碩士<br>輔仁大學<br>應用統計學研究所<br>87<br>X-bar control chart is one of the most important devices for statistical process control in industries. It provide information, successfully control processes, improve process capability, or continuously control a certain process. But X-bar control chart has been designed only with statistical criteria in mind. The use of a control chart requires that engineers select a sample size, a sampling frequency (or an interval between samples) and the control limits for the chart. Selection of these three parameters is usually called the design of X-bar control chart.

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TSENG, LIN-YOU, and 曾林右. "Change-Point Estimation of the X-bar Control Chart Using Logistic regression and Fuzzy Shift Change-point Algorithms." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/vmzkbc.

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碩士<br>國立雲林科技大學<br>工業工程與管理系<br>105<br>Control charts are the most popular process tools designed to determine whether a process is in control or not. When control chart generates an out-of- control signal, it means that the disturbance is present in the process, so the engineers should identify the time of assignable cause occurred; this moment is called the change point. Often however, the point in time at which signal is not actually the true change point. Thus, if the change point can identify quickly, it is possible to reduce the amount of time spent by engineers searching for the time of t

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Wu, Chiung-Yu, and 吳瓊玉. "A study of Detecting the Autocorrelated Process by Variable Sampling Sizes and Intervals of x-bar control chart." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14367585466219633293.

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碩士<br>國立雲林科技大學<br>工業工程與管理研究所碩士班<br>95<br>Control charts are generally applied to monitor the manufacture process and their purpose is finding the variability of process instantly and reducing producing the bad productions. In recent years, the applications of control charts are not merely the form of fixed parameter, however Costa[1999] proposed the variable sampling size and interval(VSSI ) which ability of detecting process shift is greater than traditional control chart. On the other hand, the all kinds of industries exist in the autocorrelated process, so this issue is be noticed graduall

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Lin, Long-Chin, and 林榮慶. "The Rate of False Signals in Various X-bar Control Chart Patterns with Estimated Limits Using Neural Network Method." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/04439515718555180056.

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碩士<br>雲林科技大學<br>工業工程與管理研究所碩士班<br>96<br>From practitioner’s viewpoint, control chart patterns used to be important tools in statistical process control (SPC). Unnatural patterns indicate the process affected by assignable causes that corrective actions should be taken. The average run length (ARL) has usually been studied in the in-control statistical properties. We argue that the ARL is a confusing concept when used with estimating limits and the rate of false signals (RFS,which indicates the estimated probability of inverse of ARL also called Type I error). In this thesis we describe a new fr

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