scholarly journals Optimal Maintenance for Degrading Assets in the Context of Asset Fleets-A Case Study

2020 ◽  
Vol 6 ◽  
Author(s):  
Frederik Schulze Spüntrup ◽  
Giancarlo Dalle Ave ◽  
Lars Imsland ◽  
Iiro Harjunkoski
Keyword(s):  
Decision Making ◽  
Gas Production ◽  
Academic Community ◽  
Point Of View ◽  
Mixed Integer ◽  
Optimal Decision ◽  
Small Scale ◽  
Computational Point ◽  
Optimal Maintenance

Decision-making for maintenance of engineering assets is a common challenge in the process industry due to ongoing degradation. With an increasing company-size, this problem becomes more complex from an operational and computational point of view. This paper introduces a case study to the academic community that represents the problem of optimal decision-making in the context of large asset fleets. The case study poses a large fleet of offshore compressors for gas production with a specific network structure. Two exemplary discrete-time mixed integer linear programming models following the Resource Task Network framework are presented. They address asset deterioration due to effects such as fouling by suggesting specific maintenance actions as a set of different countermeasures. Novel enumerator formulations are a computationally efficient and extendable way to model the various degradation types. Results show the benefit of optimal maintenance in the application to asset fleets. The decision-support that is delivered by the scheduling and planning approach helps to determine which maintenance type should be conducted and at what time. The paper demonstrates the benefits of optimal (long-term) schedules for maintenance, but indicate at the same time the need for efficient algorithms in the context of large asset fleets, in contrast to common industrial case studies that are rather small-scale.

scholarly journals A CASE STUDY ON THE HOUSEHOLD'S DECISION - MAKING ROLE IN SMALL-SCALE GOAT PRODUCTION IN NSUKKA LOCAL GOVERNMENT AREA OF ENUGU STATE, NIGERIA.

2021 ◽  
Vol 22 (2) ◽  
pp. 169-172
Author(s):  
A. R. Ajayi
Keyword(s):  
Health Care ◽  
Decision Making ◽  
Local Government ◽  
Herd Size ◽  
Local Government Area ◽  
Small Scale ◽  
Interview Schedule ◽  
Frequency Distributions ◽  
Enugu State

The study examined the household's decision-making role in small scale goat production in Nsukka Local Government Area of Enugu State, Nigeria. Data for the study were collected from 74 households through the use of interview schedule. Frequency distributions and percentages were used in the data analysis. The findings showed that production of manure for replenishing the lost soil fertility under continuous land use was the most valuable reason for rearing goats in the area. The husbands played a larger decision-making role than their wives for certain aspects (such as goat raising initiation; health care; herd-size; planning for organizing for breedings; and grass cutting) of goat production. Implications of the findings for extension practice were presented.

scholarly journals ESTIMATION INTRODUCTION OF THE DISCRETE HEATING SYSTEM OF THE SETTLEMENT USING THE EXPRESS-METHOD «3Е»

2019 ◽  
Vol 41 (1) ◽  
pp. 43-52
Author(s):  
V.G. Demchenko ◽  
A.S. Trubachev ◽  
S.S. Hron
Keyword(s):  
Decision Making ◽  
Heat Supply ◽  
New Technologies ◽  
Heating System ◽  
Heat Energy ◽  
Point Of View ◽  
Optimal Decision ◽  
Triangular Diagram ◽  
Modern Approach ◽  
Economic Point

The energy system of Ukraine, as well as the world power industry now in a phase of change related to the deterioration of the environment, a large number of new technologies and a change in global geopolitics. Thus, there is a need for quick decision-making when introducing new products, technologies and methods. The article proposes a modern approach to solving key strategic issues at the enterprise. A comparative analysis of existing classical methods of making management decisions is made and a number of advantages of the author's method are revealed. In this article, with the help of the proposed method, the feasibility of introducing a discrete heating system in the village is determined. In order to achieve this goal, the structure of the heat sources used in the settlement is determined, an analysis of the users of heating and comparison of the prices for heat energy is obtained using natural gas, pellets and a discrete heating system. The next step is to compare all sources of heat energy by the three main weighting criteria that most accurately reflect their quality. The preliminary expression of each criterion in a numerical dimensionless expression allows us to obtain a decision to make an optimal decision by graph-analytical method. This allows us to determine the main factors influencing the object of research and the decision making decision to three equally weighted coefficients: energy, ecology, economics. The obtained indicators are the faces of a triangular diagram, which forms the general plane within which all investigated objects or processes are located. The next step is to determine the field of satisfactory results, which has a flexible system of construction, which accurately shows the limits, taking into account the conditions of a specific task and goals. The triangular diagram has a visually accessible structure, so it is easy to understand to untrained people. As can be seen from the rating, the use of mobile heat supply with mobile battery is the most advantageous. Sources of heat supply on wood used as fuel, the most attractive from an economic point of view, however, lose to other sources of heat from the ecological and energy point of view.

scholarly journals Perceptions and Role of Tourist Destination Residents Compared to Other Event Stakeholders in a Small-Scale Sports Event. The Case of the FIS World Junior Alpine Ski Championships 2019 in Val di Fassa

2019 ◽  
Vol 11 (24) ◽  
pp. 6909 ◽  
Author(s):  
Filippo Bazzanella
Keyword(s):  
Sustainable Development ◽  
Qualitative Method ◽  
Point Of View ◽  
Small Scale ◽  
Tourist Destination ◽  
The Sustainable Development ◽  
Sports Events ◽  
The World

The role of stakeholders is critical in addressing challenges with or problems in small-scale sports events. The purpose of this study is to investigate the perceptions of the event stakeholders toward sports events, with a particular focus on the role of residents in a tourist destination. The goal is to understand their perceptions with respect to different topics and in particular to the sustainable development of the tourist destination. This case study focuses on the World Junior Alpine Ski Championships 2019 in Trentino Val di Fassa—Italy (JWC2019). Applying a mixed methodology, the study analyzes the stakeholders during the sports event (quantitative method) and the point of view of the residents in their stakeholder role after the sports event (qualitative method). The main findings of this study show that residents differ from tourists and other stakeholders in terms of their perception of the event and its strengths. But when it comes to the perceptions regarding the territory, the groups of stakeholders analyzed do not seem to have systematically different opinions. Some paradoxes do, however, emerge with respect to the residents’ awareness of their role as stakeholders and the implications of the event with respect to sustainability and how such an event may underpin a concept of sustainable development for the territory as a whole.

scholarly journals Risk and the Small-Scale Cyber Security Decision Making Dialogue—a UK Case Study

2017 ◽  
Vol 61 (4) ◽  
pp. 472-495 ◽  
Author(s):  
Emma Osborn ◽  
Andrew Simpson
Keyword(s):  
Decision Making ◽  
Cyber Security ◽  
Small Scale

scholarly journals Inventory Management at a Chilean Hospital Pharmacy: Case Study of a Dynamic Decision-Aid Tool

Mathematics ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1962
Author(s):  
Fabián Silva-Aravena ◽  
Irlanda Ceballos-Fuentealba ◽  
Eduardo Álvarez-Miranda
Keyword(s):  
Inventory Management ◽  
Decision Aid ◽  
Point Of View ◽  
Operational Cost ◽  
Computational Point ◽  
Planning Strategy ◽  
The One ◽  
And Storage ◽  
Critical Process

Pharmacy inventory management is a critical process in healthcare centers. On the one hand, effective drug procurement is fundamental for fulfilling the therapeutic requirements of patients. On the other hand, as hospital pharmacies’ purchasing and storage costs comprise an important share in the hospital budgets, efficient inventory management may play a central role in operational cost containment. Therefore, healthcare centers should design and implement decision-aid strategies for planning the purchase of drugs with the aim of avoiding excessive purchasing volumes and optimizing warehouse capacity, while also meeting forecast demand and ensuring critical stock levels. In this study, we present the methodological features of a decision-aid tool for planning the purchases and inventory levels for the controlled medication pharmacy of the Regional Hospital of Talca, Chile. We report the results obtained after 1 year of operation; these results show that our strategy produced more than 7% savings compared to the regular inventory planning strategy and was more effective in preserving critical stock levels. Furthermore, from a computational point of view, our strategy outperforms a recently published approach for a similar application.

scholarly journals Evolutionary based system for qualification and evaluation – A case study

2020 ◽  
Vol 10 (1) ◽  
pp. 49-62
Author(s):  
Ferenc János Szabó
Keyword(s):  
Decision Making ◽  
Product Design ◽  
Decision Process ◽  
Point Of View ◽  
International Project ◽  
Student Groups ◽  
Decision Making System ◽  
Points Of View ◽  
Sigmoid Functions

In a previous paper the new EBSYQ (Evolutionary Based SYstem for Qualification and Evaluation of Group Achievements) system has been proposed for teachers and juries, helping them in making accurate and objective ranking. The analysis of the behaviour of the special characteristic sigmoid functions of the groups gives the possibility to discover some interesting points of view for qualifying the achievement and the standard of the groups (subgroups of talented and under- motivated students, spectrum of the group, eigenvalues, Lorentz function). This paper shows a case study of an international project of student groups competition in the field of product design, with Finnish and Hungarian students. Comparison of the decision process of the jury without using the EBSYQ system and with the application of the system shows the efficiency of the qualification system in realizing a well-founded and careful ranking of the groups, even in case of very close competition. Each point of view of the decision-making system is evaluated by numbers, which can increase the objectivity and accuracy of the decision.

scholarly journals Sistem Informasi untuk Menentukan Potensi Mahasiswa Menggunakan Metode Fuzzy Multiple Attribute Decision Making dengan Simple Additive Weighting Studi Kasus : STIKES DUTA GAMA KLATEN

Respati ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 97
Author(s):  
Sofyan Suryawan Priyono, Wing Wahyu Winarno, Ferry Wahyu Wibowo
Keyword(s):  
Decision Making ◽  
Multiple Attribute Decision Making ◽  
Academic Community ◽  
Teaching Activities ◽  
Learning And Teaching ◽  
A Value ◽  
Multiple Attribute ◽  
Simple Additive Weighting ◽  
Academic Potential

Dalam kegiatan belajar dan mengajar lingkungan akademisi tentunya menghasilkan peserta didik yang memiliki keunggulan diatas rata – rata. Keunggulan mahasiswa dalam sebuah lingkungan belajar dapat di indikasikan menjadi sebuah potensi. Dalam studi kasus penelitian ini STIKES Duta Gama Klaten memiliki beberapa data mahasiswa yang dapat dijadikan tolak ukur untuk menentukan mahasiswa yang memiliki potensi.Dengan implementasi metode Fuzzy Multiple Attribute Decision Making dengan Simple Additive Weighting, yaitu melakukan pembobotan pada setiap alternatif pada semua atribut. Data yang ada akan diberikan nilai sesuai dengan rating kecocokan setiap alternatif. Potensi mahasiswa yang selama ini hanya di indikasikan dalam bidang akademik saja, dalam penelitian ini dibagi menjadi 3 alternatif yaitu potensi akademik, potensi non akademik, dan potensi umum.Hasil dari tahap perankingan akan dijadikan sebagai informasi yang diberikan kepada bagian akademik untuk dijadikan pertimbangan. Diharapkan dengan adanya penerapan metode metode Fuzzy Multiple Attribute Decision Making dengan Simple Additive Weighting dapat membantu dalam menentukan potensi apa saja yang ada dalam lingkungan civitas akademika STIKES Duta Gama Klaten.Kata kunci: Potensi, Akademisi, Civitas, Fuzzy Multiple Attribute Decision Making, Simple Additive Weighting                                               ABSTRACTIn the learning and teaching activities of the academic environment of course produce learners who have above average superiority. Student excellence in a learning environment can be indicated to be a potential. In this case study study STIKES Duta Gama Klaten has some student data that can be used as a benchmark to determine students who have potential.With the implementation of Fuzzy Multiple Attribute Decision Making method with Simple Additive Weighting, which is to weighting every alternative on all attributes. Existing data will be assigned a value in accordance with each alternative's match rating. Potential students who have been only indicated in the field of academics alone, in this study is divided into 3 alternatives of academic potential, non-academic potential, and general potential.The results of the ranking stage will be used as information given to the academic to be considered. It is expected that the application of the method of Fuzzy Multiple Attribute Decision Making method with Simple Additive Weighting can help in determining the potential of what is in the academic community of STIKES Duta Gama Klaten.Keywords: Potential, Academic, Civitas, Fuzzy Multiple Attribute Decision Making, Simple Additive Weighting

scholarly journals Chinese Migrants in Italy: A Socio-economic Portrait

2020 ◽  
Vol 13 (1) ◽  
pp. 48-62
Author(s):  
E. A. Maslova ◽  
R. Loreto Cecioni
Keyword(s):  
Textile Industry ◽  
Home Country ◽  
Point Of View ◽  
Small Scale ◽  
Italian Economy ◽  
Push And Pull Factors ◽  
Chinese Migrants ◽  
Chinese Overseas ◽  
Push And Pull

Italy is one of the European countries hosting the largest number of Chinese immigrants. In the early 1980’s, the first Chinese new migrants came to Italy, where they would find an employment in the Italian textile industry. Since then, Chinese overseas have played an important role in the field of fashion, a sector of the Italian economy with a high demand in production and manual work. Petty trading and small-scale enterprises are also representations of the Chinese population’s activity in Italy. This article provides statistics concerning the Chinese migrants as an economically active person and the activities of the Chinese community in Italy as a whole.The authors analyze the phenomenon of Chinese labour migration to Italy from the point of view of the “push and pull factors” migration theory. This article illustrates the main factors leading Chinese citizens to leave their home country and shift to Italy, where China turns out to be the point of origin for one of the largest communities of extra-EU immigrants. It is shown that for the Chinese, Italy is a destination country, which is largely due to the already existing migrant network. As a case-study in the frame of this analysis, the authors take Prato (a municipal township located in Tuscany), renowned for hosting the largest Chinatown in Europe (so called “Chinese exclave”).

scholarly journals Assessing Multidimensional Poverty Based on the Sustainable Livelihood Framework: A Case Study of Hang Kia and Pa Co Communes, Mai Chau District, Hoa Binh Province

2017 ◽  
Vol 33 (4) ◽  
Author(s):  
Dang Huu Lieu ◽  
Nguyen Thi Ha Thanh
Keyword(s):  
Decision Making ◽  
Poverty Reduction ◽  
Multidimensional Poverty ◽  
Point Of View ◽  
Sustainable Livelihood ◽  
Poverty Assessment ◽  
Sustainable Livelihood Framework ◽  
Hoa Binh

Vietnamese government is officially applying standards of multidimensional poverty as a basis for poverty assessment in the period 2016-2010, overcoming limitations of income poverty’s assessing methods. However, to the authors’ point of view, its selected indicators have not yet reflected the comprehensive aspects of life, while multidimensional poverty assessment (driven from OPHI) based on sustainable livelihood framework (of DFID) is considered as a better method. This research is conducted in Hang Kia and Pa Co, the mountainous communes of Mai Chau district, Hoa Binh province, by using the later methods. Total 13 indicators under 5 livelihood sources were selected. As the results, the rates of multidimensional poverty in these two communes were shown by the insufficiency in each indicator, by communes and by kinds of poverty households. This result can be used for better decision- making on poverty reduction

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