Variation Source Identification in Manufacturing Processes Based on Relational Measurements of Key Product Characteristics

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Jean-Philippe Loose ◽  
Shiyu Zhou ◽  
Dariusz Ceglarek
Keyword(s):  
Quality Improvement ◽  
Source Identification ◽  
Joint Probability ◽  
Manufacturing Processes ◽  
Quality Model ◽  
Dimensional Measurements ◽  
Identification Techniques ◽  
Joint Probability Density ◽  
Quality Measurements

Variation source identification for manufacturing processes is critical for product dimensional quality improvement, and various techniques have been developed in recent years. Most existing variation source identification techniques are based on a linear fault-quality model, in which the relationships between process faults and product dimensional quality measurements are linear. In practice, many dimensional measurements are actually nonlinearly related to the process faults: For example, relational dimension measurements such as the relative distance between features are used to monitor composite tolerances. This paper presents a variation source identification methodology in the presence of these relational dimension measurements. In the proposed methodology, the joint probability density of the measurements is determined as a function of the process parameters; then, series of statistical comparisons are performed to differentiate and identify the variation source. A case study is also presented to illustrate the effectiveness of the methodology.

Sediment source identification: a review and a case study in some Canadian streamsThis paper is one of a selection of papers in this Special Issue in honour of Professor M. Selim Yalin (1925–2007).

2009 ◽  
Vol 36 (10) ◽  
pp. 1622-1633 ◽  
Author(s):  
Bommanna G. Krishnappan ◽  
Patricia A. Chambers ◽  
Glenn Benoy ◽  
Joseph Culp
Keyword(s):  
Source Identification ◽  
State Of The Art ◽  
Control Strategies ◽  
Agricultural Watersheds ◽  
Sediment Source ◽  
Sediment Control ◽  
Adverse Impacts ◽  
Identification Techniques ◽  
Selection Of

The state-of-the-art of sediment source identification is reviewed in this paper. Sediment “fingerprinting” techniques using different “fingerprint” properties were examined. With these techniques, it is possible to identify potential sources of sediment transported in river systems. Such knowledge is useful for implementing sediment control strategies to limit sediment production from upland areas in a watershed as well as for developing guidelines for land use practices to minimize adverse impacts on surface and ground water resources in agricultural watersheds. Examples of sediment source identification techniques that were carried out in agricultural watersheds in different parts of the world were also included in the present review.

Engineering-Driven Factor Analysis for Variation Source Identification in Multistage Manufacturing Processes

2008 ◽  
Vol 130 (4) ◽  
Author(s):  
Jian Liu ◽  
Jianjun Shi ◽  
S. Jack Hu
Keyword(s):  
Factor Analysis ◽  
Source Identification ◽  
Domain Knowledge ◽  
Measurement Data ◽  
Factor Loading ◽  
Data Driven ◽  
Manufacturing Processes ◽  
Multistage Manufacturing ◽  
Engineering Models

Variation source identification is an important task of quality assurance in multistage manufacturing processes (MMPs). However, existing approaches, including the quantitative engineering-model-based methods and the data-driven methods, provide limited capabilities in variation source identification. This paper proposes a new methodology that does not depend on accurate quantitative engineering models. Instead, engineering domain knowledge about the interactions between potential variation sources and product quality variables is represented as qualitative indicator vectors. These indicator vectors guide the rotation of the factor loading vectors that are derived from factor analysis of the multivariate measurement data. Based on this engineering-driven factor analysis, a procedure is presented to identify multiple variation sources that are present in a MMP. The effectiveness of the proposed methodology is demonstrated in a case study of a three-stage assembly process.

SEKOLAH GRATIS DAN MUTU SEKOLAH: STUDI KASUS DI SMAN 2 BABAT TOMAN MUSI BANYUASIN SUMSEL

2015 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Afriantoni Afriantoni ◽  
Ibrahim Ibrahim
Keyword(s):  
Quality Improvement ◽  
Qualitative Method ◽  
School Quality ◽  
School Policy ◽  
School Education ◽  
Education Quality ◽  
Free School ◽  
School Costs

This study aimed to describe in depth between the link of school policy and the school quality improvement. The method in this study is a qualitative method using the case study presented descriptively. This research was conducted at SMA Negeri 2 Babat Tomat Kabupaten Musi Banyuasin. Based on this study it was found that the First, free school policy can help the economy / ease the burden of school costs to be incurred by the parents. Second, the policy constraints of the application for free school educa-tion at SMAN 2 Babat Toman is not very effective, so that the students' interest is not increasing, infrastructure is one of the obstacles in the implementation of free school education, how the quality of schools will be increased if it is not supported by facilities and complete infrastructure. Third, the quality of school education free SMAN 2 Babat Toman already realized well with regard to input, input turns unselected maximum, that is the students. Fourth, the implementation of free school education in Banyuasin, the quality of school SMAN 2 Babat Toman Muba Sumsel was not increased. This means that the implementation for free school education quality of school SMAN 2 Babat Toman was not increased.Keywords : free schools, school quality, case studies

Edukasi dan Peningkatan Kualitas Pengelolaan Obat di Rumah Tangga: Studi Kasus di Dusun Sidasari Wetan Desa Kubangkangkung Kawunganten Cilacap (Education and Quality Improvement of Drug Management in Family: A Case Study at Dusun Sidasari Wetan, Kubang

2018 ◽  
Vol 2 (2) ◽  
pp. 93
Author(s):  
Hendri Wasito ◽  
Hening Pratiwi ◽  
Adi Wibowo ◽  
Nia Kurnia Solihat
Keyword(s):  
Quality Improvement ◽  
Home Visit ◽  
Behavioral Changes ◽  
Drug Management ◽  
Educational Effort ◽  
The Family ◽  
Service Activity ◽  
Knowledge And Attitude

Drugs are an important component of health services that are the needs of the community. There is still a lack ofcommunity knowledge of medicines and management especially for family members, hence an educational effort as well asimprovement of quality of drug management in family through training program and mentoring by pharmacist. Thiscommunity service activity aims to determine the knowledge and attitude of the community in managing drugs in the familyand improve the quality of drug management by the community in the family. The activity was conducted in SidasariWetanKubangkangkung Village Kawunganten Cilacap. The workshop on drug management in family was conducted by pharmaciststo the 33 participants. Data collection was done by using questionnaire and observation through home visit. The result of theactivity shows that the increase of knowledge and attitude of the society in managing drugs in the familywere 10% and 7%,respectively. Workshop activities and mentoring by pharmacists can provide benefits and behavioral changes in family drugsmanagement.

QFD A TOOL FOR QUALITY IMPROVEMENT IN THE MANUFACTURING INDUSTRY-A CASE STUDY ON PUMP

2018 ◽  
Vol 74 (6) ◽  
Author(s):  
Chandrashekhar K. Patil ◽  
M. Husain ◽  
N.V. Halegowda
Keyword(s):  
Quality Improvement ◽  
Manufacturing Industry

scholarly journals Hospital managers’ perspectives with implementing quality improvement measures and a new regulatory framework: a qualitative case study

BMJ Open ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. e042847 ◽  
Author(s):  
Sina Furnes Øyri ◽  
Geir Sverre Braut ◽  
Carl Macrae ◽  
Siri Wiig
Keyword(s):  
Quality Improvement ◽  
Adaptive Capacity ◽  
Qualitative Content Analysis ◽  
Regulatory Framework ◽  
Local Context ◽  
Quality And Safety ◽  
Hospital Practice ◽  
Hospital Managers ◽  
Safety Improvement

A new regulatory framework to support local quality and safety efforts in hospitals was introduced to the Norwegian healthcare system in 2017. This study aimed to investigate hospital managers’ perspectives on implementation efforts and the resulting work practices, to understand if, and how, the new Quality Improvement Regulation influenced quality and safety improvement activities.DesignThis article reports one study level (the perspectives of hospital managers), as part of a multilevel case study. Data were collected by interviews and analysed according to qualitative content analysis.SettingThree hospitals retrieved from two regional health trusts in Norway.Participants20 hospital managers or quality advisers selected from different levels of hospital organisations.ResultsFour themes were identified in response to the study aim: (1) adaptive capacity in hospital management and practice, (2) implementation efforts and challenges with quality improvement, (3) systemic changes and (4) the potential to learn. Recent structural and cultural changes to, and development of, quality improvement systems in hospitals were discovered (3). Participants however, revealed no change in their practice solely due to the new Quality Improvement Regulation (2). Findings indicated that hospital managers are legally responsible for quality improvement implementation and participants described several benefits with the new Quality Improvement Regulation (2). This related to adaptation and flexibility to local context, and clinical autonomy as an inevitable element in hospital practice (1). Trust and a safe work environment were described as key factors to achieve adverse event reporting and support learning processes (4).ConclusionsThis study suggests that a lack of time, competence and/or motivation, impacted hospitals’ implementation of quality improvement efforts. Hospital managers’ autonomy and adaptive capacity to tailor quality improvement efforts were key for the new Quality Improvement Regulation to have any relevant impact on hospital practice and for it to influence quality and safety improvement activities.

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