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Tytuł:
Wybrane aspekty ryzyka w procesie produkcyjnym realizowanym w przodkach ścianowych kopalń węgla kamiennego
Selected aspects of risk in the production process in longwall fronts in coal mines
Autorzy:
Snopkowski, R.
Napieraj, A.
Sukiennik, M.
Powiązania:
https://bibliotekanauki.pl/articles/165660.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Górnictwa
Tematy:
węgiel kamienny
ryzyko
mapa procesu
przodek ścianowy
hard coal
risk
process chart
longwall front
Opis:
W artykule podjęto próbę kwantyfikacji ryzyka produkcyjnego, związanego z procesem produkcyjnym realizowanym w przodkach ścianowych kopalń węgla kamiennego. Określono mapę cyklu produkcyjnego realizowanego w technologii jednokierunkowego urabiania oraz wyszczególniono potencjalne rodzaje ryzyka oraz skutki, jakie może powodować dane niepowodzenie. Wyznaczono formułę całkową, której wykorzystanie umożliwia wyznaczenie prawdopodobieństwa niewykonania planu produkcyjnego.
This paper attempts to quantify the production risk connected with production process in longwall fronts in coal mines. A production cycle chart for one-way winning technology was determined and potential types of risk and effects which can be brought by a particular failure presented. An integral formula was defined which may be used to determine probability of failure in the execution of the production plan.
Źródło:
Przegląd Górniczy; 2015, 71, 8; 86-89
0033-216X
Pojawia się w:
Przegląd Górniczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Defect Reduction by Total Quality Management in a Crackers Manufacturing System
Autorzy:
Hasan, Md. Zahid
Rezwan, Ashique
Islam, Md. Rakibul
Dutta, Abir
Powiązania:
https://bibliotekanauki.pl/articles/1177871.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Check sheet
Fishbone diagram
Pareto analysis
Process flow chart
TQM
defect etc
Opis:
The main focus was to reduce defects in production lines of a newly started crackers manufacturing company as well as develop such a system so that mass defects can’t happen again. To ensure a rated benefit & make the market value constant in the market an efficient system is one of the primary requirements. The prime qualities must be constant. So, to ensure that the causes of defects will not happen again the root-cause analysis has been done from the record of check sheet. Then all the errors from vital elements of production were detected and actual parameters, ingredient composition, temperature, pressure, steam supply etc. have been tried to maintain constantly. The co-operation of top to bottom hierarchy made this process successful & also able to build a permanent preventive system. Finally, a stable & reliable production system has been established to maintain target production and achieve maximum benefit ensuring excellent quality of product.
Źródło:
World Scientific News; 2018, 98; 150-171
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Improvement Procedure of Engineering Students of Bangladesh Applying Total Quality Management: A Review
Autorzy:
Dutta, Abir
Shatu, Ruhul Amin
Powiązania:
https://bibliotekanauki.pl/articles/1165657.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Check Sheet
Kaizen
PDCA cycle etc.
Pareto Analysis
Process flow chart
Root Cause Analysis
Stratification Analysis
TQM
Opis:
The main focus of this paper is to integrate the application of Total Quality Management & Kaizen in improvement of Engineering students. Most Engineering students get depressed when they can’t understand the topics & fail to cut a good figure in the semester final exam as well as there CGPA becomes poor. 80-90% students blame the curriculum & system but it is not easy to change the system rapidly. The irony is, in Bangladesh most of the time is spent to memorize books for good academic performance. The Engineering Education Curriculum is mainly memorizing based. Students have to learn a lot of theory & write them in the exam as given in reference books to get good marks. This system makes students bookish & discourages them from creativity & innovation. The evaluation system in this educational system only represents how much a student spends time for academic studies not the creativity, intelligence, passion & dedication etc. This makes frustrated who are involved in innovative projects, research or contests. Without creativity & innovation it is not possible to advance the science & technology which is the main purpose of Engineering. In this research a structured & detailed process of TQM & Kaizen has been discussed & showed which is suitable to achieve which goal. One is for determining & analyzing problems & another is one of the best process to achieve a satisfactory outcome in academic & professional development process.
Źródło:
World Scientific News; 2018, 107; 216-223
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two smart tools for control chart analysis
Autorzy:
Hamrol, A.
Kujawińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/384657.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
process
control chart
process stability
trend
pattern recognition
Opis:
The paper deals with the analysis of process stability with the use of process control charts. A new idea of pattern recognition and two original methods of data processing, called OTT and MW have been described. The software application CCAUS (Control Charts - Analysis Unnatural Symptoms) supporting process control charts analysis withOTT and MW has been presented as well. Also the paper contains the results of the verification of the proposed methods performed on the basis of data obtained from two machining operations.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 3; 90-95
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Attribute np control charts using resampling systems for monitoring non-conforming items using exponentiated half logistic distribution
Autorzy:
Tanveer, Ammara
Azam, Muhammad
Aslam, Muhammad
Shujaat Navaz, Muhammad
Powiązania:
https://bibliotekanauki.pl/articles/406284.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
attribute chart
time truncation
process
statistical distributions
sampling schemes
Opis:
An attribute np control chart has been designed using resampling systems for monitoring non- -conforming items under exponentiated half-logistic distribution. We suppose that lifetime follows exponentiated half-logistic distribution. For the proposed control charts, the optimal parameters and control limits have been obtained. The operational formulas for in-control and out of control average run lengths (ARLs) have been derived. Control constants are established by considering the target in-control ARL at a normal process. The extensive ARL tables are reported for various parameters and shifted values of process parameters. The performance of the proposed control chart is evaluated with several existing charts with regard to ARLs, which empower the presented chart and prove far better for timely detection of assignable causes. A wide range of tables, a real-life example, and simulation study for RGS and MDS are given for a better understanding of the problem.
Źródło:
Operations Research and Decisions; 2020, 30, 2; 115-143
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breakdown cause and effect analysis. Case study
Autorzy:
Biały, W.
Ružbarský, J.
Powiązania:
https://bibliotekanauki.pl/articles/409633.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
analysis
production process
breakdown
FMEA
Ishikawa diagram
Pareto chart
Opis:
Every company must ensure that the production process proceeds without interferences. Within this article, the author uses the term “interferences” in reference to unplanned stoppages caused by breakdowns. Unfortunately, usually due to machine operators’ mistakes, machines break, which causes stoppages thus generating additional costs for the company. This article shows a cause and effect analysis of a breakdown in a production process. The FMEA as well as quality management tools: the Ishikawa diagram and Pareto chart were used for the analysis. Correction measures were presented which allowed for a significant reduction in the number of stoppages caused by breakdowns.
Źródło:
Management Systems in Production Engineering; 2018, 2 (26); 83-87
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and perspectives on multivariate statistical process control charts used in the industrial sector: a systematic literature review
Autorzy:
Ueda, Renan M.
Agostino, Ìcaro R. S.
Souza, Adriano M.
Powiązania:
https://bibliotekanauki.pl/articles/2127533.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multivariate statistical process control
systematic review
control chart
manufacturing
industrial
Opis:
The objective of this article is to carry out a systematic review of the literature on multivariate statistical process control (MSPC) charts used in industrial processes. The systematic review was based on articles published via Web of Science and Scopus in the last 10 years, from 2010 to 2020, with 51 articles on the theme identified. This article sought to identify in which industry the MSPC charts are most applied, the types of multivariate control charts used and probability distributions adopted, as well as pointing out the gaps and future directions of research. The most commonly represented industry was electronics, featuring in approximately 25% of the articles. The MSPC chart most frequently applied in the industrial sector was the traditional T2 of Harold Hotelling (Hotelling, 1947), found in 26.56% of the articles. Almost half of the combinations between the probabilistic distribution and the multivariate control graphs, i.e., 49.4%, considered that the data followed a normal distribution. Gaps and future directions for research on the topic are presented at the end.
Źródło:
Management and Production Engineering Review; 2022, 13, 2; 48--60
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of statistical process control for proper processing of the Fore-Sudetic Monocline copper ore
Autorzy:
Tasdemir, A.
Kowalczuk, P. B.
Powiązania:
https://bibliotekanauki.pl/articles/110236.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
copper
upgrading
statistical process control
ARIMA model
Shewhart’s chart
autocorrelation
Opis:
The paper deals with Statistical Process Control (SPC) applied to three original and three generated variables of copper ore upgrading by flotation. The six variables were evaluated by the SPC charts based on industrial upgrading of copper ore data gathered during one month of operation in the form of copper content in feed, concentrate and tailing. The remaining three upgrading variables were concentrate yield, copper recovery in concentrate and non-copper components recovery in tailing. Although, all variables obeyed normal distribution, considerable autocorrelation was detected between observations for all variables. For this reason, the traditional Shewhart control charts, that assume the process data generated are normally and independently distributed, resulted in many of out-of-control points which may lead to wrong decisions regarding the control of process variables. The most suitable ARIMA time series models were determined for all variables to remove autocorrelations. The ARIMA(0,1,1) model was found the best for copper content in feed, copper content in concentrate, concentrate yield and non-copper components recovery in tailing, while the AR(1) model was suitable for copper content in tailing and copper recovery in concentrate.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 1; 249-264
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interval Type-2 fuzzy Exponentially Weighted Moving Average Control Chart
Autorzy:
Adepoju, Akeem Ajibola
Abdulkadir, Sauta S.
Jibasen, Danjuma
Chiroma, Haruna
Powiązania:
https://bibliotekanauki.pl/articles/2021442.pdf
Data publikacji:
2022-03-15
Wydawca:
Główny Urząd Statystyczny
Tematy:
Exponentially weighted moving average control chart
Fuzzy control chart
Fuzzy sets
Interval Type-2 fuzzy sets
Interval Type-2 fuzzy Exponentially Weighted Moving Average Control Chart
Statistical process control
Opis:
Some industrial data often come with uncertainty, which in some cases depends on the decision of those responsible for taking the measurement in the production process. While the fuzzy approach helps to tackle the ambiguity that arises in the measurement, an interval type-2 fuzzy set deals with such uncertainty better due to its flexibility over the control limits of its control chart. This paper aims to develop an Interval Type-2 fuzzy Exponentially Weighted Moving Average Control Chart (IT2FEWMA) under the fuzzy type-2 condition. This development will facilitate monitoring small and moderate shifts in the production process in conditions of uncertainty.
Źródło:
Statistics in Transition new series; 2022, 23, 1; 185-200
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rezultaty razrabotki i testovyh ispytanij diagnostičeskoj sistemy ocenki kačestva vnutricilindrovyh processov dizelâ
Results of the development of diagnostic tests and test quality assessment processes intracylinder Diesel
Autorzy:
Vališhin, A.
Powiązania:
https://bibliotekanauki.pl/articles/360405.pdf
Data publikacji:
2013
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
diesel
diagnosis
intracylinder process
indicator chart
statistical methods
normal Gaussian distributions
skewness
kurtosis
Opis:
The paper presents the results of the development of diagnostic quality systems intracylinder process of marine Diesel. Diagnostic system is designed based on software product Excel, which greatly simplifies its use on vessels and reduces the cost of its acquisition. In the developed system it uses the methods of statistical evaluation of the Diesel engine by comparing skewness and kurtosis of the reference and the actual indicator diagrams.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 34 (106); 85-90
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
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