Defect Cause Modeling with Decision Tree and Regression Analysis

2008-12-28
Bakır, Berna
Batmaz, İnci
Aydınlık Güntürkün, Fatma
İpekçi, İlker A.
Köksal, Gülser
Özdemirel, Nur Evin
The main aim of this study is to identify the most influential variables that cause defects on the items produced by a casting company located in Turkey. To this end, one of the items produced by the company with high defective percentage rates is selected. Two approaches-the regression analysis and decision trees are used to model the relationship between process parameters and defect types. Although logistic regression models failed, decision tree model gives meaningful results. Based on these results, it can be claimed that the decision tree approach is a promising technique for determining the most important process variables.

Suggestions

Defect Cause Modeling with Decision Tree and Regression Analysis
Bakır, Bahadır Sadık; Batmaz, İnci; KÖKSAL, GÜLSER; Özdemirel, Nur Evin (2006-12-10)
The main aim of this study is to identify the most influential variables that cause defects on the items produced by a casting company located in Turkey. To this end, one of the items produced by the company with high defective percentage rates is selected. Two approaches-the regression analysis and decision trees-are used to model the relationship between process parameters and defect types. Although logistic regression models failed, decision tree model gives meaningful results. Based on these results, it...
Event studies in Turkey
BAŞDAŞ, Ulkem; Oran, Adil (2014-09-01)
The primary goal of this paper is to review the event studies conducted for Turkey to in order to identify the common components in their designs. This paper contributes to the existing literature by reviewing all event studies for Turkey for the first time, but more importantly; this review leads to the upcoming event studies on Turkey by highlighting main components of a proper design. Based on the review of 75 studies, it is observed that event studies generally choose BIST-100 (formerly, ISE-100) market...
Reliability and validity of the Turkish version of the service quality assessment scale
Gürbüz, Bülent; Koçak, Mehmet Settar; Department of Physical Education and Sports (2003)
The purpose of this study was to test the reliability and validity of the Turkish version of the Service Quality Assessment Scale (SQAS). The participants of this study constituted of 338 male (53.1%) and 298 female (46.9%) health-fitness club̕s members. The Confirmatory Factor Analysis (CFA) was used to examine the factor structure of the SQAS instrument, which assess the service quality of health-fitness clubs. Six-factor model of SQAS was analyzed based on the Maximum Likelihood (ML) estimation method. T...
Floating photovoltaic site selection using fuzzy rough numbers based LAAW and RAFSI model
Deveci , Muhammet; Pamucar, Dragan; Oğuz, Elif (2022-06-01)
This study presents a quantitative methodology for FloatingPhotovoltaic(FPV) power plant site selection in Turkey usingGeographical Information Systems(GIS) and fuzzy sets, which is one of the Multi-Criteria Decision Making (MCDM) methods. In this study, we propose a new hybrid framework which combines fuzzy rough number (FRN) based decision making model including LAAW (Logarithmic Additive Assessment of the Weight coefficients) and RAFSI (Ranking of Alternatives through Functional mapping of criterionsubin...
Estimation of seismic losses in urban regions within an interdisciplinary framework a case study
Askan Gündoğan, Ayşegül; Erberik, Murat Altuğ; Yakut, Ahmet; Asten, Michael; Karim Zadeh Naghshineh, Shaghayegh (2014-04-30)
Abstract – The purpose of the study described in this article was to assess teachers’planning practices at the primary-school level in Turkey. Altogether 210 schools weresurveyed, a questionnaire was distributed to all teachers in these schools, and 1194teachers responded to the questionnaire. The results indicated that the main sourcesof influence on daily and unit plans are teachers’ experience, the national curriculumand the course textbooks. In daily planning, teachers ass...
Citation Formats
B. Bakır, İ. Batmaz, F. Aydınlık Güntürkün, İ. A. İpekçi, G. Köksal, and N. E. Özdemirel, “Defect Cause Modeling with Decision Tree and Regression Analysis,” 2008, Accessed: 00, 2021. [Online]. Available: https://publications.waset.org/9221/pdf.