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1

An integrated modelling approach for an optimal location of warehouses in the defence industry organisation

Bayrakcı Melda Gelibolu, Baykoç Ömer Faruk

Operations Research and Decisions

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2023

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Vol. 33, No. 2

35--52

EN

Countries’ defence industries are the leading indicator of their global power. The warehouse is the place where the materials are kept until the customer order arrives so that the companies are viable and can respond appropriately to internal/external customer demands. In this regard, warehouse location plays a vital role in the defence industry in terms of storage options with increased flexibility, a simplified supply chain with cost management and optimal positioning according to deployment locations. In this study, the decision on the location of warehouses for logistic support during the warranty period of military vehicles manufactured and supplied to the armed forces by a defence company was made. It is aimed to propose the best solution to a real-life problem with high complexity, containing many data and constraints. In this context, the criteria that are thought to be most relevant to this problem have been determined by taking expert opinions. Having determined the order of importance of the requirements by the analytical hierarchy process (AHP) with the Super Decisions V 2.10, their weights were included as a coefficient of the objective function in the goal programming (GP) model. As a result of solving the GP model using GAMS (general algebraic modelling system), it was decided to select the warehouses that provided the optimal results among the alternative warehouse locations in 9 different locations. Furthermore, to see the impact of changes in criterion weights, sensitivity analysis has also been included. The significance of this research lies within the integrated usage of AHP and GP in the defence industry when determining warehouse locations by the experts’ opinions. With this study, not only a solution strategy was developed, but also a basis for the warehouse location decision in the defence industry projects already signed or to be signed was given.

2

The use of the multi-criteria analysis for the exploration of surface irrigation potential zones : A case of the Didesa sub-basin, Abay basin, Ethiopia

Tamiru Habtamu, Dinka Megersa O.

Journal of Water and Land Development

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2023

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no. 58

198--211

EN

This paper presents a study conducted using the Multi-Criteria Analysis (MCA) to explore surface irrigation potential zones in the Didesa sub-basin of the Abay basin in Ethiopia. Physical land features, such as land use / land cover (LULC), slope, soil depth, drainage, and road proximity, along with climate factors like rainfall and evapotranspiration, and population density, were identified as criteria for the exploration. The analytic hierarchy process (AHP) is a powerful structured decision-making technique commonly used for complex multi-criteria analysis problems where multiple criteria need to be considered. The importance of the criteria was prioritised and ranked in the analytic hierarchy process (AHP). Five qualitative-quantitative based surface irrigation potential zones were identified, namely highly suitable (48.40%), moderately suitable (27.26%), marginally suitable (13.27%), not suitable (4.91%), and irrigation constraints (6.16%). The consistency of the AHP technique in the exploration of surface irrigation potential zones is evaluated by the consistency index at CI = 0.011 and confirmed the correctness of weights assigned for the individual key factor in the AHP. The accuracy of the potential zones generated in the AHP was evaluated with ground-truth points and a supervised LULC classification map. Moreover, a good agreement was made among the classes with the kappa index (KI = 0.93). Therefore, the application of the MCA for the exploration of surface irrigation potential zones was successful, and the results of the study will be useful to strengthen the irrigation in the explored potential zones.

3

Investigation of Finite Groundwater Potential Zones through Analytical Hierarchy Process and ArcGIS for the Region of Visakhapatnam District, Andhra Pradesh

Kalyani Kunchala, Reddyy Mutukuru Gangireddy Muni

Ecological Engineering & Environmental Technology

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2023

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Vol. 24, iss. 3

161--175

EN

Due to the indiscriminate use of limited water sources, the requirement for groundwater evaluation in India expanded substantially. Population growth and unequal distribution, poor irrigation systems, rapid urbanization/industrialization, large-scale deforestation, droughts, and inefficient land use practises contribute to groundwater depletion.As a result, the need for water for agriculture, domestic, and industry soars. The study identifies viable zones in Visakhapatnam’s emerging metropolitan metropolis by utilising the Analytical Hierarchy Process (AHP) approach with remote sensing data in ArcGIS software. Thematic layers were created by taking remote sensing data into consideration (drainage density, soil, lineament density, land use land cover, geomorphology, rainfall, slope, and geology). The method is employed to determine the weights of distinct thematic layers by obtaining the normalised weight from a pairwise matrix.To emphasize the groundwater potential zones and create a map with different zones specified, the weights and ranks extrapolated from the AHP approach have been made available in the weighted index overlay analysis tool in ArcGIS.Groundwater availability and recharge are significantly high in the good zone of the present study’s four classifications of good, moderate, low, and very low. The groundwater status, potential locations for water extraction, and best practises for groundwater recharging may all be determined with the use of the acquired information from the indication map.

4

Use of integrated AHP-topsis method in selection of optimum mine planning for open-pit mines

Ozdemir Ali Can

Archives of Mining Sciences

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2023

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Vol. 68, no. 1

35--53

EN

Successful mine planning is necessary for the sustainability of mining activities. Since this process depends on many criteria, it can be considered a multi-criteria decision making (MCDM) problem. In this study, an integrated MCDM method based on the combination of the analytic hierarchy process (AHP) and the technique for order of preference by similarity to the ideal solution (TOPSIS) is proposed to select the optimum mine planning in open-pit mines. To prove the applicability of the proposed method, a case study was carried out. Firstly, a decision-making group was created, which consists of mining, geology, planning engineers, investors, and operators. As a result of studies performed by this group, four main criteria, thirteen sub-criteria, and nine mine planning alternatives were determined. Then, AHP was applied to determine the relative weights of evaluation criteria, and TOPSIS was performed to rank the mine planning alternatives. Among the alternatives evaluated, the alternative with the highest net present value was selected as the optimum mine planning alternative. It has been determined that the proposed integrated AHP-TOPSIS method can significantly assist decision-makers in the process of deciding which of the few mine planning alternatives should be implemented in open-pit mines.

5

Site suitability analysis for construction of an airport in the middle Euphrates - Iraq, using a GIS-based AHP technique

Manea Ali Kadhim

Archives of Civil Engineering

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2023

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Vol. 69, nr 1

469--494

EN

This article discusses in a simplified manner how to use the multiple functions of the Geographic Information System (GIS) to support the engineering decision for vital and important sites that require the decision-maker to have a high degree of certainty, such as the decision related to choosing the best location for the airport among several sites. This paper aims to provide a practical model that allows for a decision support system on how to adopt a GIS software by both its part Arc-Map and Arc-Catalog combined with analytic hierarchy process (AHP) method to make strategic decisions by spatial and non-spatial analysis to choose the appropriate site for the project as those related to choosing an airport location. Nineteenth criteria were considered to analyze the study area which is represented by three governorates of the middle Euphrates region in Iraq, Babil, Kerbala, and AL-Najaf. Finally, the research presented a practical and efficient approach for the decision maker to select the appropriate location for the airport based on the value of the highest suitability index.

6

Effective control measures to minimize cost overrun during construction phase of high-rise residential building projects in Chongqing, China

Wang Yue, Ghazali Farid Ezanee Mohamed

Archives of Civil Engineering

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2023

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Vol. 69, nr 3

79--94

EN

Cost overrun during construction is one of the most common problems occur in construction projects around the world, which also includes the area of Chongqing in China. At present, there are few studies related to cost overruns at the construction stage of high-rise residential building projects (HRBPs) in Chongqing. The purpose of this study is to develop effective control measures from the contractor’s perspective to help projects to minimize cost overruns during the construction phase of HRBPs in Chongqing. Firstly, through the literature review and semi-structured interviews, 65 cost overrun-related risk factors in construction projects were identified. All the risk factors have been prioritized through the analytic hierarchy process (AHP) based on their importance to project success. Out of the 65 factors identified, 12 were classified as the critical ones that have a great potential to instigate a cost overrun during construction to take place in the real project. There were four risk factors that have the greatest impact on cost overruns, and their weights were 0.04 or above, including low bid, force majeure, undetailed/inaccurate geological survey data, and increased loan interest rates. Finally, control measures were developed for these four critical cost overrun risk factors (CCORFs). The measures developed provided a guideline to control the risk of cost overruns and clear control key points to help contractors minimize cost overruns on construction projects.

7

Decision-making model using the Analytical Hierarchy Process for the selection of the type of concrete and the method of its maintenance in dry, hot climate conditions

Hsino Mahmoud, Jasiczak Józef

Archives of Civil Engineering

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2023

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Vol. 69, nr 3

385--403

EN

The article presents selected types of phase change materials (PCM) and their properties in terms of applications in construction and concrete technology. The purpose of using PCM is to allow the technological barrier to be exceeded in hot and dry climate conditions, enabling the construction of non-cracking concrete structures. Methodology of the multi-criteria decision-making process with the use of a relatively new decision-making tool in construction - the Analytical Hierarchical Process (AHP) is presented. Theoretical aspects of the method and an example of its practical use for the selection of the best material variant and concrete care method in the dry Syrian climate are presented. The conclusions resulting from the presented article concern two areas, i.e. the advisability of using phase change materials for temperature regulation in the maturing fresh concrete in dry climate conditions and the attractiveness of the AHP method justifying the advisability of choosing the maintenance methods in such conditions.

PL

W artykule przedstawiono wybrane rodzaje materiałów zmiennofazowych (PCM) oraz ich właściwości pod kątem zastosowań w budownictwie, w tym w technologii betonu. Celem stosowania PCM jako dodatku do świeżego betonu jest umożliwienie przekroczenia określonych barier technologicznych występujących w warunkach klimatu gorącego i suchego, gwarantując schładzanie betonu i tym samym wykonanie niezarysowanych konstrukcji betonowych. Przedstawiono metodologię wielokryterialnego procesu decyzyjnego związanego z wyborem różnych wariantów pielęgnacji betonu w warunkach ekstremalnie suchych z wykorzystaniem stosunkowo nowego narzędzia decyzyjnego w budownictwie jakim jest AHP tj. Analytic Hierarchy Process. Przedstawiono teoretyczne aspekty metody oraz przykład jej praktycznego zastosowania do wyboru najlepszego rodzaju cementu oraz betonu i metody jego pielęgnacji w suchym klimacie syryjskim. Wnioski płynące z przedstawionego artykułu dotyczą dwóch obszarów, tj. celowości stosowania materiałów PCM z przemianą fazową o stosunkowo niskiej temperaturze do regulacji temperatury w dojrzewającym świeżym betonie w suchych warunkach klimatycznych oraz atrakcyjności metody AHP uzasadniającej celowość wyboru alternatywnych metod pielęgnacji młodego betonu w takich warunkach.

8

The critical trait of digital entrepreneur: mixed methods research

Chuang Li-Min, Lee Yu-Po, Chang Yu-Ju

Acta Innovations

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2023

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no. 46

5--18

EN

Pioneers of the digital era have invented a different business model and expanded the existence of the digital economy, and the digital entrepreneurship is the beginning of this digital revolution. To explore the key characteristics of digital entrepreneurs, this study is divided into two stages. The first stage conducted a literature review and case study to construct the characteristic elements of the entrepreneurship into a model of digital entrepreneurs. In the second stage, the relative weights of the key characteristics of digital entrepreneurs are understood through an analysis of the AHP questionnaire results. The results show that autonomy and selfdiscipline are keys among the main dimensions of the key characteristics of digital entrepreneurs' entrepreneurship; the secondary dimension of "action power" is key in the main dimension of "autonomy and self-discipline"; the secondary dimension of "business networks" is key in the main dimension of "social capital"; the secondary dimension of "insight" is key in the main dimension of "innovation and breakthrough"; the secondary dimension of "communication ability" is key in the main dimension of "leadership communication".

9

Delineating groundwater potential zones using an integrated geospatial and geophysical approach in Phuentsholing, Bhutan

Gyeltshen Sangay, Kannaujiya Suresh, Chhetri Indra Kumar, Chauhan Prakash

Acta Geophysica

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2023

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Vol. 71, no. 1

341--357

EN

Groundwater can serve as an alternative measure to solve the scarcity in perennial water sources. In this perspective, a study has been carried out in Phuentsholing, Bhutan, for demarcating the most probable zone for groundwater source by an integrated application of geospatial and geophysical survey. The seven contributing factors (i.e. geology, geomorphology, drainage, landuse landcover (LULC), normalized difference vegetation index (NDVI), lineament, and slope are evaluated. Subsequently, an Analytic Hierarchy Process (AHP) is also carried out to normalize the weightage and rank of the individual factors, which are further overlaid using the Weighted Index Overlay (WIO) algorithm. The resultant groundwater potential was categorized into: extremely high (0.7%), high (54%), moderate (12.5%), low (21%), and extremely low (12%) potential zones. Each of this category is further validated by Vertical Electrical Sounding (VES-3) using Schlumberger electrode configuration and identified the most probable groundwater exploration zones towards the south-western parts of the study area. Thus, the study emphasizes on significant role of remote sensing and geographic information system (GIS) in aggregation with the geophysical and statistical measures to delineate the most probable location for groundwater resources in the Himalayan region.

10

Cloud manufacturing: identifications and prioritization of opportunities using AHP

Sharma Mohneesh Kumar

Zeszyty Naukowe. Transport / Politechnika Śląska

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2022

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z. 115

161--173

EN

The origin of a cost-efficient, service-oriented, customer-centric, manufacturing system called cloud manufacturing has evolved due to advancements in cyber systems and the availability of internet facilities worldwide. However, there is a significant number of opportunities before the adoption of cloud manufacturing. Through literature survey, expert opinions from academicians and industrialists, various opportunities, namely, pay-as-use, scalability, cost efficiency, flexibility, autonomy, low-risk backup and recovery, low startup cost and location independence associated with the espousal of cloud manufacturing are identified. Further, the Analytic Hierarchy Process (AHP) model is applied to find the weights and prioritize these opportunities, thereby finding the significant key opportunities. Moreover, the consistency ratio is calculated for the accuracy and consistency of the results. As the obtained value of consistency ratio is less than .1, it shows that the result obtained is consistent and accurate. The managerial implication of these outcomes is that the results would indirectly help entrepreneurs in the adoption of cloud manufacturing.

11

Wybór metody pomiarowej do inwentaryzacji obiektu zabytkowego z zastosowaniem AHP

Skrzypczak Izabela, Leśniak Agnieszka

Materiały Budowlane

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2022

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nr 11

106--108

PL

Wybór metody inwentaryzacji obiektu zabytkowego zależy od wielu czynników. Celem pracy był wybór najkorzystniejszej metody pomiarowej do inwentaryzacji rzeszowskiego Ratusza. Rozważano cztery metody pomiaru i dokonano ich oceny za pomocą pięciu kryteriów. Do wspomagania procesu decyzyjnego wykorzystano metodę analizy wielokryterialnej AHP. W przypadku analizowanego obiektu najkorzystniejszy okazał się naziemny skaning laserowy. Zaprezentowano także wybrane elementy przeprowadzanego procesu inwentaryzacji.

EN

The choice of a heritage building inventorying method depends on many factors. The aim of the work was to select the most advantageous measurement method for the Rzeszów Town Hall inventory. Four measurement methods were considered and assessed according to five criteria. The multi-criteria AHP method was used to support decision-making. Terrestrial laser scanning has proved to be the most advantageous for the analysed case. Selected elements of the on-going inventory process were also presented.

12

Application of concepts of the analytic hierarchy process in decision-making

Krenicky Tibor, Hrebenyk Liudmyla, Chernobrovchenko Vadym

Management Systems in Production Engineering

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2022

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nr 4 (30)

304--310

EN

The Analytical Hierarchy Process (AHP) is one of the multi-criteria methods with tools that are effective for decision-making in complementary or alternative medicine (CAM). This approach, in combination with other available methods, such as the Utrecht Method, allows medical professionals and patients themselves to take a balanced choice of special treatment and health control. This is particularly important for pregnant women who suffer from nausea and vomiting during pregnancy (NVP). The mechanisms of toxicosis occur, and the way of treatment have certain uncertainties. The decision-making process for therapeutic care must consider several factors, the determination of which is the result of collaboration between the patient and the healthcare provider. This paper presents the results of a decision-making study regarding the use of the ginger medicinal plant in helping a woman with NVP symptoms. The research was conducted using the original questionnaire according to the methodology proposed by the developers of the Utrecht Method. The chosen respondents were healthcare professionals with experience in treating NVP and pregnant women. The Analytical Hierarchy Process (AHP) capabilities in decisionmaking were shown in an example of analyzing the benefits, risks, and side effects of using ginger during pregnancy. The combination of two methodological approaches allowed to successfully connect the proven facts of using CAM therapy with the subjective assessment of all stakeholders. The study demonstrates that this approach successfully uses decision-making by structuring hierarchical decision elements and weighing the criteria involved in the decision-making issue. The article examines the practicality and effectiveness of using AHP when making decisions regarding the treatment and improvement of the condition of pregnant women with NVP, and summarizes the quantitative and qualitative indicators of the effectiveness of this method. The presented combination of two methodological approaches in decision-making allows for choosing an optimized medical strategy for supporting pregnant women through CAM therapy.

13

Application of AHP-GIS Model to Assess the Ecological Suitability of Codonopsis javanica in Kon Plong District, Kon Tum Province, Viet Nam

Tri Chu Luong, Tuan Tran Anh, Kiem Truong Ngoc

Journal of Ecological Engineering

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2022

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Vol. 23, nr 7

276--283

EN

The Kon Plong district is located in the northeast area of the Kon Tum province, where ethnic people, such as Xo Dang and Hre, are dominant. With the portion of the poor families accounting for more than 50% of the total households, the improvement in the livelihood of ethnic is an emergency. Among the approaches to enhance the economical situation in the mountainous area like Kon Plong, the sustainable utilization of natural resources to produce valuable products is a possibility. The Codonopsis javanica (Blume) Hook.f. & Thomson (native name in the Vietnamese language is Dang Sam) is a precious medicinal plant with many benefits in pharmacological uses for human health. In nature, C. javanica is favorably distributed in the template climate and high mountain area. On the basis of the multi-criteria analysis using AHP (Analytic Hierarchy Process) integrated GIS, the influence of climate factors and soil features in the Kon Plong district on the growth of C. javanica was evaluated. Using AHP evaluation, the four classes of adaptation thresholds (very suitable, suitable, less suitable and not suitable) between the C. javanica growth and climate or soil factors were determined and expressed in weight values. These adaptation values (weight values) were then exported to ecological adaptation maps using the GIS mapping system. The results showed that the most suitable area (called S1 and S2) for the cultivation of C. javanica could be an area of 77 ha, accounting for 55.8% of the study area. The area with high adaptability (S1) for growing C. javanica is mainly located in the Mang Den town and Mang But commune (the south area of the Kon Plong district). These study findings suggested that the growth of C. javanica is suitable in several places in Kon Plong and the production process of C. javanica probably promotes the exploitation of sustainable utilization of local medical plant biomass in the study area.

14

Performance Evaluation of Hydro Power Projects in India Using Multi Criteria Decision Making Methods

Manoj Vasupalli, Rathnala Prasanthi, Sura Srinivasa Rao, Sai Sake Namruth, Murthy Metta Venkata Ramana

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 5

205--217

EN

In the contemporary period of the green economy, energy planning has grown more complicated due to the inclusion of numerous standards, including technical, social, economic, and environmental. This, in turn, restricts the ability of decision-makers to make the most efficient use of energy resources. In addition, the difficulty of energy planning is exacerbated by topographical restrictions on renewable energy systems, the majority of which are found in nature. Based on factors such as total installed capacity, total reservoir capacity, total surface capacity, the height, length, number of units, and the cost of the dam were used to determine the finest hydro power project in India, according to this study. For performance evaluation, multi criteria decision making (MCDM) techniques like analytic hierarchy process (AHP) and TOPSIS (technique for order reference by similarity to ideal solution) are used in conjunction with VIKOR (vlekriterijumsko kompromisno rangiranje) for performance evaluation. AHP is used to calculate the weights of each criteria. The TOPSIS and VIKOR methods will utilise these weights to choose the optimal option. For the purpose of demonstrating the approaches’ applicability, an in-depth case study of various hydropower facilities in India was carried out.

15

Zintegrowane podejście do wyboru optymalnej serii zapraw tynkarskich do izolacji

Demir Abdullah

Cement Wapno Beton

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2022

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R. 27, nr 1

32--44

PL

W niniejszym artykule zaproponowano metodę Taguchiego do rozwiązania hierarchicznej analizy problemu decyzyjnego [Analytic Hierarchy Process - AHP] oraz metodę Simple Additive Weighting [SAW] w celu znalezienia optymalnej serii zapraw tynkarskich do izolacji, w oparciu o wiele kryteriów. Najpierw zastosowano metodę Taguchi w celu określenia planu eksperymentu z czynnikami: cementem, wapnem, dolomitem i perlitem na trzech poziomach dozowania, dla każdego z nich z ortogonalnym planem L9. Następnie, zgodnie z projektem, przeprowadzono eksperymenty metodą ultradźwiękową, określono wytrzymałość na ściskanie, przyczepność, nasiąkliwość kapilarną i przewodność cieplną. Wagi ważności kryteriów uzyskano metodą AHP, a punktację poszczególnych serii obliczono metodą SAW. Na podstawie wyników uzyskano optymalne poziomy czynników i otrzymano optymalne składy.

EN

In this study, an integrated approach by Taguchi, Analytic Hierarchy Process [AHP] and Simple Additive Weighting [SAW] method was proposed to find out the optimal insulation plaster mortar series, based on multiple criteria. Firstly, Taguchi method was applied to define the experimental design plan, with the factors of cement, lime, dolomite and perlite in three levels for each with L9 orthogonal design. Then, ultrasonic pulse velocity, compressive strength, bond strength, capillarity water absorption and thermal conductivity experiments, were made according to the design. The importance weights of criteria were obtained by AHP and the scores of the series were calculated by SAW method. The factors’ optimum levels were obtained based on the scores and the optimal series was proposed.

16

Methodic approach to assessment of the types of balanced land use of rural areas

Kovalyshyn Oleksandra, Pendzey Lubov, Tretiak Nataliia, Kulikovska Olha, Kangalov Plamen, Shchur Taras, Kocira Sławomir

Agricultural Engineering

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2022

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Vol. 26, No. 1

215--229

EN

The article studies a methodic approach to the assessment of the types of balanced land use of rural areas based on the analytic hierarchy process in the context of sustainable development. In particular, the authors of the research present the assessment and trends of changes of the indicators of land use greening, which is the most sensitive element of sustainable development. To identify the directions of land use greening, the authors make a comparative assessment of the actual and standard (maximum) ecological parameters of land use on the territory of Trybukhivtsi amalgamated territorial community. Ploughness of the territory exceeds the norm by 22.5%; the share of perennial plants, hayfields and grassland in the total area of agricultural lands is by 12.5% below the norm; the share of forest cover is 9.5% lower than the norm required by law. Therefore, the authors propose a hierarchy structure of alternative types of planning the balanced development of land use for the studied territory. Based on the results of interrogated specialists and the conducted expert estimates, the researchers got a score of assessment criteria/subcriteria and priority alternatives of the land use types. The assessment of criteria/subcriteria and alternative types of the balanced land use development was used to compose comparative assessment matrixes and to identify and wyznaczthe priority vectors of land use planning by territorial communities. It is marked. Please note that the mentioned methodic approach can be used for determining the priorities of rural area development, which can be achieved by different measures. Rational combination of the priorities will shape the policy of sustainable development of rural areas.

PL

W artykule zbadano metodyczne podejście do oceny typów zrównoważonego zagospodarowania przestrzennego obszarów wiejskich w oparciu o analityczny proces hierarchiczny osadzony w kontekście zrównoważonego rozwoju. Autorzy badań skoncentrowali się na ocenie i przedstawieniu trendów zmian wskaźników związanych z uwrażliwieniem na kwestie środowiskowe odnośnie użytkowania terenu, co stanowi najbardziej wrażliwy element zrównoważonego rozwoju. W celu określenia kierunków rozwoju tych trendów autorzy przeprowadzili ocenę porównawczą rzeczywistych i standardowych (maksymalnych) parametrów ekologicznych użytkowania terenu na terytorium ukraińskiej gminy Trybuchowce. Poziom gruntów ornych w gminie przekracza normę o 22,5%; udział roślin wieloletnich, pól uprawnych i łąk w ogólnej powierzchni gruntów rolnych jest o 12,5% niższy od normy wymaganej przez prawo, a udział pokrywy leśnej - o 9,5% niższy. Dlatego autorzy proponują hierarchiczną strukturę alternatywnych rodzajów planowania zrównoważonego rozwoju użytkowania gruntów dla badanego terenu. Na podstawie wyników rozmów z ekspertami i przeprowadzonych badań autorzy ustalili punktową ocenę kryteriów/podkryteriów oraz priorytetowych wariantów rodzajów jego użytkowania. Ocena kryteriów/podkryteriów i alternatywnych typów zrównoważonego zagospodarowania terenu posłużyła do stworzenia macierzy oceny porównawczej i określenia priorytetowych wektorów planowania zagospodarowania terenu przez gminy. Zaznaczono. Należy pamiętać, że wspomniane podejście metodyczne można wykorzystać do określenia priorytetów rozwoju obszarów wiejskich, realizowanych za pomocą różnych środków. Racjonalne połączenie priorytetów będzie kształtowało politykę zrównoważonego rozwoju obszarów wiejskich.

17

State regulation in foreign economic activity of cement industry of Ukraine

Topolnytska Tetiana, Matskiv Romana, Yatsiuk Oleh, Savko Oksana, Hryvnak Bohdan

Management Systems in Production Engineering

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2021

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nr 3 (29)

215--226

EN

To specify the problems and priorities of state regulation of foreign economic activity (FEA) of cement industry enterprises of Ukraine, it is proposed to use the tool for assessing the state of FEA of cement industry enterprises, which is based on the expert method. The FEA development index of the cement industry is constructed with the usage of the method of expert assessments and analysis of the hierarchies of significance of each factor. Due to this, it was found that producers underestimate their own abilities to compete in foreign markets regarding the assortment structure, unsatisfactory financial condition, fierce competition and recession in foreign markets, especially traditional for Ukraine; unsatisfactory state policy of support of the development of the cement industry, in particular in terms of transparency of resource provision, assistance in updating the technical and technological base of the industry, the implementation of state infrastructure projects in Ukraine. On this basis, the priorities of state regulation of foreign economic activity of cement industry enterprises were determined by the following groups: sales, institutional and instrumental ones.

18

Development of Subcontractor Selection Models Using Fuzzy and AHP Methods in the Apparel Industry Supply Chain

Lahdhiri Mourad, Babay Amel, Jmali Mohamed

Autex Research Journal

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2021

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Vol. 21, no. 4

413--427

EN

The subcontractor selection decision is inherently a multicriterion problem. It is a decision of strategic importance for companies. The nature of this decision is usually complex and unstructured. Management science techniques might be helpful tools for solving these kinds of decision-making problems. In this research, the fuzzy logic method and the analytic hierarchy process were applied for the selection of suitable subcontractors in an apparel supply chain. In general, many factors, such as quality level, price offer, and delivery delay, were considered to determine the most suitable and reliable subcontractors that fit the company's strategy. This survey is carried out using the database of an apparel company manufacturing denim products.

19

The analysis of dependence of the level of operational costs and production outputs upon geological and mining conditions in selected hard coal mines in Poland

Sobczyk Eugeniusz Jacek, Sokołowski Andrzej, Kopacz Michał, Fijorek Kamil, Denkowska Sabina

Gospodarka Surowcami Mineralnymi

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2020

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T. 36, z. 3

75--96

EN

This publication presents the research aimed at developing statistical models, on the basis of which it was possible to prepare credible forecasts of unit cost and coal net output for longwalls in 5 hard coal mines in Poland. The argument has been verified that there is a dependence between the level of nuisance and the level of costs, as well as longwall production results. A research procedure has been developed for that purpose, which aimed at developing two statistical models connecting the nuisance due to geological and mining conditions with costs and longwall production results. The multiple linear regression technique has been used to develop statistical models. The set of data taken into account in the analyses comprised 120 longwalls mined in the years 2010–2019. Two models have been developed – one for forecasting unit costs, the other for forecasting coal net output. Subsequently, the models’ forecasting ability has been verified on a sample of historical data. A relative forecast error for 75% of observations has been in the range of (–25%; +37%). That result has been considered satisfactory. Subsequently, using those models, forecasts of unit costs and coal net output have been prepared for 220 longwalls planned for mining in the years 2020–2030. Those forecasts have been prepared in the stipulated ranges of geological and mining nuisance influencing mining process, by means of dedicated W Ue and W Ut factors. The nuisance models for forecasting purposes have been developed using the AHP (Analytic Hierarchy Process) method. The research hypothesis has been confirmed on the basis of the obtained results. An increase in the level of nuisance leads to an increase in the unit costs for longwalls and the deterioration of production results. Unit operating costs for longwalls in specific ranges of nuisance may differ by up to 30%, being in the range of 52.0–120.3 zł/Mg. Likewise, the coal daily output of longwalls may be even 22% lower, having the average level in the range of 1.89–3.61 thousand Mg/d.

PL

Publikacja prezentuje badania zmierzające do opracowania modeli statystycznych, na podstawie których możliwe było wykonanie wiarygodnych prognoz kosztu jednostkowego i wydobycia netto ścian w 5 kopalniach węgla kamiennego w Polsce. Weryfikowano tezę, że istnieje zależność pomiędzy poziomem uciążliwości a wielkością kosztów i wynikami produkcyjnymi ścian. W tym celu opracowano procedurę badawczą prowadzącą do skonstruowania dwóch modeli statystycznych wiążących uciążliwość warunków geologicznych i górniczych z kosztami i wynikami produkcyjnymi ścian. Do skonstruowania modeli statystycznych posłużono się techniką regresji wielorakiej. Zbiór danych, które uwzględniono w analizach, obejmował 120 ścian eksploatowanych w latach 2010–2019. Powstały dwa modele – jeden dla celów prognozowania kosztów jednostkowych, drugi – produkcji węgla netto. Następnie wykonano weryfikację zdolności prognostycznej tych modeli w próbie danych historycznych. Względny błąd prognozy dla 75% obserwacji wahał się w przedziale (–25%; +37%), a jego średnia wartość dla wszystkich obserwacji nie przekraczała 5% dla obu tych modeli. Wynik ten, mimo defektów modelowania liniowego, uznano za satysfakcjonujący. Następnie przy użyciu tych modeli wykonano prognozy kosztów jednostkowych i coal net output dla 220 ścian planowanych do wydobycia w latach 2020–2030. Prognozy te wykonano w umownych przedziałach uciążliwości geologicznych i górniczych warunków procesu eksploatacji za pomocą wskaźników WUe i WUt. Modele uciążliwości dla celów prognostycznych skonstruowano z wykorzystaniem metody AHP (Analytic Hierarchy Process). Na bazie otrzymanych wyników teza badawcza została potwierdzona. Wzrost uciążliwości prowadzi do wzrostu kosztu jednostkowego ścian i pogorszenia wyników produkcyjnych. Zależność ta nie jest liniowa. Koszty jednostkowe ścian w poszczególnych przedziałach uciążliwości mogą się wahać nawet do 30%, mieszcząc się w przedziale 52,0–120,3 zł/Mg. Podobnie również wydobycie dobowe ze ścian może być niższe nawet o 22%, i kształtować na poziomie średnim w przedziale 1,89–3,61 tys. Mg/d.

20

Pythagorean Fuzzy Analytical Network Process (ANP) and Its Application to Warehouse Location Selection Problem

Yaman Tutku Tuncalı

Annals of Computer Science and Information Systems

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2020

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Vol. 21

137--140

EN

Although new techniques are added to multi-criteria decision-making (MCDM) techniques every day, fuzzy applications of current and proven methods also take a large place in the literature. The main subject of this study is to propose an extension of Pythagorean fuzzy sets (PFS), which are useful to overcome the uncertainty in multi-criteria decision processes, to the well-known Analytical Network Process (ANP) technique. For this purpose, an empirical application of the proposed method was carried out in defining criteria weights of the warehouse location selection problem in the medical sector.