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1

Validity and reliability testing of the questionnaire used to finalize criteria for the evaluation of the contractor’s performance

Mahadik Sunil, Topkar Vinay

Archives of Civil Engineering

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2023

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Vol. 69, nr 4

477--492

EN

The paper aims to determine the criteria and sub-criteria for evaluating the contractor’s performance and finalize a master list of the criteria and sub-criteria to be used for evaluating contractor’s performance with their respective weights. The method is incorporated in the framework proposed for the evaluation of the contractor’s performance during the execution phase. An exploratory study has been opted, using a structured, close-ended multiple-choice questionnaire survey approach. The questionnaire survey was conducted in two phases, i.e. validation survey, and reliability survey. Fifteen experts responded to the validation survey, and thirty experts to the reliability survey. The experts were from Government and public sectors in India, working at various senior levels. The weights of criteria and sub-criteria were calculated from data collected in the survey, relative importance was calculated through the relative importance index and criteria were ranked. The paper provides criteria and sub-criteria which were finalized through a questionnaire survey by classification of criteria identified in literature and tender review. The respective weights were finalized, which can be measured while evaluating contractors’ performance. The weights assigned to criteria through the survey are; health and safety is 13.19%, followed by finance 11.93%, time 11.93%, quality 13.38%, client satisfaction 12.42%, environmental safety 12.32%, productivity 12.51% and regulation 12.32%. The paper provides the criteria and sub-criteria with their weights needed for evaluating the performance of contractors during the project execution phase. This research can lead to a culture of continuous measurement of performance for the satisfactory completion of projects.

2

Analysis of aircraft equipment requirements to conduct RNP APCH approach operation

Kwasiborksa Anna, Gładyś Sylwester, Banaszek Krzysztof, Manewrowski Jerzy, Roś Maciej

Systemy Logistyczne Wojsk

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2021

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Vol. 55, no. 2

101--120

PL

Ruch statków powietrznych jest ciągle analizowany z uwagi na problematykę pojemności przestrzeni powietrznej i przepustowości portów lotniczych. Ważnym obszarem jest podejście do lądowania statków powietrznych na dane lotnisko z wykorzystaniem pomocy nawigacyjnych. Urządzenia i systemy nawigacyjne są dostosowywane do wymagań prawnych organizacji europejskich i międzynarodowych. Do użytku operacyjnego podczas podejść do lądowania dopuszczono możliwość korzystania z systemu GNSS wraz z odpowiednią augmentacją (ABAS lub SBAS) określoną jako podejścia RNP APCH. Ich wprowadzenie skutkowało w pojawieniu się szeregu korzyści. Autorzy podjęli się analizy wymagań wyposażenia pokładowego statków powietrznych niezbędnego do wykonywania podejść RNP APCH. Celem naukowym jest ocena wyposażenia pokładowego RNAV statków powietrznych na przykładzie trzech przewoźników lotniczych (stan na grudzień 2018r.). Weryfikacji poddano hipotezę szacując wysoki stopień wyposażenia pokładowego RVAV statków powietrznych. Zastosowano metodę analizy wykorzystując aplikację CNS Dashboard udostępnionej przez Eurocentów. Wskazuje ona zadeklarowane możliwości nawigacyjne samolotów na podstawie planów lotu ICAO przesyłanych przez przewoźników do Network Managera skorelowanych z bazą danych statków powietrznych PRISME Fleet 2. W wyniku przeprowadzonej analizy, można zauważyć, że prawie wszystkie badane statki powietrzne miały wymaganą certyfikację do przeprowadzania podejść RNP APCH z użyciem systemu ABAS (96% badanych). Z drugiej strony żaden z samolotów nie miał wymaganego wyposażenia do wykorzystywania systemu SBAS podczas lądowania. Na podstawie badania dokumentów i obserwacji obszaru badawczego można stwierdzić, że przewoźnicy lotniczy coraz częściej wyposażają swoje statki powietrzne w wymagane moduły podejściach do lądowania typu RNP APCH.

EN

Aircraft traffic is constantly analyzed due to the issues of airspace and airport capacity. An important area is the approach to landing of aircraft at a given airport with the use of navigation aids. Navigation devices and systems are adapted to the legal requirements of European and international organizations. The use of the GNSS system with appropriate augmentation (ABAS or SBAS) defined as RNP APCH approaches is authorized for operational use during landing approaches. Their introduction resulted in the emergence of a number of benefits. The authors analyzed the requirements of the aircraft on-board equipment necessary to perform RNP APCH approaches. The research goal is to evaluate the RNAV on-board equipment of aircraft on the example of three air carriers (as of December 2018). The hypothesis was verified by estimating the high level of on-board RVAV equipment of the aircraft. The method of analysis was applied using the CNS Dashboard application provided by Eurocontrol. It indicates the declared navigational capabilities of airplanes based on ICAO flight plans sent by carriers to the Network Manager correlated with the PRISME Fleet 2 aircraft database. using the ABAS system (96% of respondents). On the other hand, none of the aircraft had the required equipment to use SBAS during landing. Based on the examination of documents and observation of the research area, it can be concluded that air carriers more and more often equip their aircraft with the required modules of RNP APCH landing approaches.

3

The modeling and forecasting of fuel and energy resources usage in the context of the energy independence of Ukraine

Andrusiv Uliana, Zelinska Halyna, Galtsova Olga, Kupalova Halyna, Goncharenkо Nataliia

Polityka Energetyczna

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2021

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T. 24, z. 1

29--48

EN

The article analyzes the structure of energy resources, as a result of which the reasons for their irrational use in the Ukrainian economy are revealed. It has been established that during 2014–2018 there was a decrease in demand for traditional types of fuel and energy resources (FER), except for coal. The components of the process of supply and consumption of fuel and energy resources have been formed and detailed, and an integrated approach to their rational use has been developed, which will reduce the loss of energy resources and increase their efficiency. The author’s approach is used in the form of visualized schemes for organizing the process of the rational use of energy resources, which will contribute to the implementation of an effective energy saving policy of the state, ensuring the competitive advantages of domestic enterprises, increasing their competitiveness, improving the economic and energy security of Ukraine. The expediency of constructing deterministic economic models for providing the Ukrainian economy according to different (adaptive and multiplicative) convolutions was substantiated and proved, on the basis of which a forecast and assessment of the energy independence of the Ukrainian economy until 2035, taking into account fuel and energy resources, was proposed. Based on the calculations, it was established that the state of energy independence of Ukraine is insufficient.

PL

W artykule dokonano analizy struktury zasobów energetycznych, w której wyniku ujawniono przyczyny ich nieracjonalnego wykorzystania w ukraińskiej gospodarce. Ustalono, że w latach 2014–2018 nastąpił spadek zapotrzebowania na tradycyjne rodzaje paliw i surowców energetycznych, z wyjątkiem węgla. Elementy składowe procesu zaopatrzenia i zużycia paliw i surowców energetycznych zostały określone w sposób szczegółowy oraz wypracowano zintegrowane podejście do ich racjonalnego wykorzystania, które ograniczy utratę zasobów energetycznych i zwiększy ich efektywność. Autorskie podejście wykorzystywane jest w postaci poglądowych schematów organizacji procesu racjonalnego wykorzystania surowców energetycznych, co przyczyni się do realizacji skutecznej polityki oszczędzania energii w kraju, zapewniając przewagę konkurencyjną rodzimym przedsiębiorstwom poprzez zwiększenie ich atrakcyjności, poprawę bezpieczeństwa gospodarczego i energetycznego Ukrainy. Uzasadniono i udowodniono celowość konstruowania deterministycznych modeli ekonomicznych ukraińskiej gospodarki według różnych (adaptacyjnych i multiplikatywnych) splotów funkcji, na podstawie których przedstawiono prognozę i ocenę niezależności energetycznej ukraińskiej gospodarki do 2035 roku, z uwzględnieniem paliw i zasobów energetycznych. Na podstawie obliczeń ustalono, że stan niezależności energetycznej Ukrainy jest niewystarczający.

4

An approach to the location of a warehouse distribution centre in the international environment: a Slovenian perspective

Muha R., Sever D., Sokolovskij E.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2018

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nr 55 (127)

79--85

EN

The article identifies the optimal location of the warehouse distribution centre for Slovenian companies in the international environment. The process of location selection takes into account a series of interconnected factors, including flows of goods between countries; the level of development of the transport system and transport infrastructure; the number of transport companies; labour costs and labour productivity; and the tax benefits existing in each country. Scientific literature mentions various methods for choosing a warehouse location, which differ in complexity and in the use of different qualitative and quantitative factors. However, the methods discussed have a disadvantage in that they use the current input variables when defining the optimal location. Choosing the optimal warehouse location is an important long-term logistics process, which should consider the fact that the environment in which companies operate is constantly changing. Using the proposed approach, future trends in the international environment are presented, which enables a better choice of warehouse location in the long run. Through this approach, companies can save on logistic costs, while also providing better quality logistics services. The analysis represents a starting point for deciding the location of a warehouse, but does not constitute a complete set of guidelines for companies to follow, as the choice of a particular location is dependent upon the complexity of the international environment in which a company operates.

5

Harmonization of market conditions in provision of road freight transport

Poliak M., Šimurková P., Jaśkiewicz M., Więckowski D.

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

175--181

EN

International road transport is a specific service within the frame of services provided in the European Union. It is because the conditions of being active on the market are influenced by the states where businessmen operate, but services can be provided throughout the whole year in other member states of the European Union. The aim of the contribution is to highlight the existing problems in international road freight transport sector. These problems persist despite the fact that market access was exempted from the national law of individual member states and regulated directly by EU regulations. Despite the unification of market access, tax and social harmonization is not ensured in international road freight transport. An unequal tax burden on carriers and different requirements of wage regulations create a discriminatory environment among entrepreneurs. The contribution identifies the factors that deform the equal operating conditions in single market. The aim of the contribution is also to provide the readers with the answers to the questions: Is it possible under current EU conditions to harmonize tax and social conditions? What impact would this harmonization have on business environment?

6

Klasyfikacja danych z wykorzystaniem zmodyfikowanego podejścia opartego na dynamicznym programowaniu

Zielosko B., Żabiński K.

Studia Informatica

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2017

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Vol. 38, nr 2

45--54

PL

Artykuł stanowi kontynuację badań dotyczących zmodyfikowanego algorytmu dynamicznego programowania dla optymalizacji reguł decyzyjnych względem pokrycia. Praca przedstawia wyniki eksperymentalne dotyczące regułowego klasyfikatora, dla zbiorów danych umieszczonych w Repozytorium Uczenia Maszynowego.

EN

The article is a continuation of research connected with a modified dy-namic programming algorithm for optimization of decision rules relative to coverage. The paper contains experimental results for rule based classifier using data sets from UCI Machine Learning Repository.

7

Optimization of Świnoujście port areas and approach channel parameters for safe operation of 300-meter bulk carriers

Gucma S.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2016

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nr 48 (120)

125--133

EN

This article presents the optimized parameters of the Świnoujście seaport entrance and three-kilometer fairway linking Świnoujście and Szczecin, extended to allow the safe entry of 300-meter bulk carriers drawing up to 13.5 meters. The parameters were determined by a simulation-based optimization method, where the objective function and its constraint were, respectively, the reconstruction costs of that waterway section and the vessels’ navigation safety. The study made use of real-time simulation in coordination with the vessel’s human operator.

8

Position fixing and its accuracy evaluation

Filipowicz W.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2013

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nr 36 (108) z. 1

42--48

EN

In traditional approach to position fixing navigator exploits mathematical apparatus based on probability theory. Series of assumptions are required in order to use the platform to draw final conclusions. Limited ability is available regarding fix accuracy a posteriori evaluation. In the paper Mathematical Theory of Evidence is exploited in order to introduce new foundations enabling modeling and solving problems with uncertainty. Modified scheme of approach towards making the fix delivers new standpoint for perceiving accuracy of the result.

9

The investment attractiveness evaluation : methods and measurement features

Goncharuk A. G., Karavan S

Polish Journal of Management Studies

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2013

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Vol. 7

160--166

EN

Today, enterprises operate under the fierce competition. So, there is a need of quick reaction on changes in external environment, and improvement of the performance. Constant development is the key to success for any organization. However, this process requires investment - the growth engine for the company. The only way to attract the capital and strengthen market positions is raising the level of the investment appeal. Approaches determination of the investment attractiveness evaluation, gives a deeper understanding of this economic category, and as a consequence the possibility of effective investment attractiveness management - one of the main tasks for any enterprise.

PL

Obecnie przedsiębiorstwa działają w warunkach ostrej konkurencji. Tak więc istnieje potrzeba szybkiego reagowania na zmiany w otoczeniu zewnętrznym i poprawa wydajności. Ciągły rozwój jest kluczem do sukcesu każdej organizacji. Jednakże proces ten wymaga inwestycji - silnika rozwoju organizacji. Jedynym sposobem aby przyciągnąć kapitał i umocnić pozycję na rynku jest podniesienie atrakcyjności inwestycyjnej. Określenie podejścia do oceny atrakcyjności inwestycyjnej daje lepsze zrozumienie tej kategorii ekonomicznej a w konsekwencji możliwość efektywnego zarządzania atrakcyjnością inwestycyjną - jako jedno z głównych zadań każdego przedsiębiorstwa.

10

21 years of quality management and consumer protection in Romania

Dragulanescu N G

Polish Journal of Management Studies

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2013

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Vol. 7

299--314

EN

The former socialist/communist rule kept Romania almost isolated from the Western World during about half a century (1945-1989). All about 7000 Romanian former state-owned companies (which were operational at the end of 1989) were obliged, by Law, starting the years ‘60, to organize their own so-called „CTC (Technical Quality Control) Department”, in order to only inspect the quality of their products. In 1992, two years only after the fall of Ceausescu’s dictatorship, in Romania were published both the first Romanian edition of famous ISO 9001 standard (in 1987, when ISO published its first international issue, the former Romanian regime did not allow the translating of it in Romanian!) and the first Consumer Protection Act in Romania’s history. This paper introduces - from both historical and professional insider’s perspective - the most important facts, challenges, issues and outcomes of these very important events, happened over two decades ago.

PL

Poprzednie komunistyczne/socjalistyczne zasady trzymały Rumunię w izolacji od świata zachodniego, przez ponad pół wieku (1945-1989). Około 700 rumuńskich przedsiębiorstw państwowych (które działały pod koniec 1989 roku), były zobowiązane, przez prawo, od lat 60-tych do organizacji własnych oddziałów zwanych Technicznymi Oddziałami Jakości, w celu przeprowadzania kontroli jakości swoich produktów. W roku 1992, dwa lata po upadku reżimu Ceausescu, w Rumunii opublikowana została pierwsza norma ISO 9001 (w 1987 roku, kiedy ISO opublikowała swoją pierwszą międzynarodową normę, rząd w Rumunii nie wyraził zgody na jej tłumaczenie) a także Consumer Protection Act - pierwszy w historii Rumunii. Niniejszy artykuł przedstawia - zarówno z perspektywy historycznej jak i zawodowej - najważniejsze fakty, wyzwania, problemy i rezultaty tych ważnych wydarzeń, które miały miejsce ponad dwie dekady temu.

11

Between tradition and modernity of the cultural landscape research. Discussion on methodology

Myga-Piątek Urszula

Prace Komisji Krajobrazu Kulturowego

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2008

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nr 9

75--91

EN

At present, geographic work, and landscape research in particular, is carried out basing on three coexistent paradigms. The first is the classical paradigm arising from the neo-positivist orientation with scientistic approach. Representatives of this approach follow the rule of objectivity and independence of perception of the object (landscape) in relation to the observer (subject). The principal determinant of this approach is methodological unity and rationalism based on the rules of quantitative, mathematical-statistical description. Foremost among others, this trend is representted by followers of the eastern school of landscape research, named “landshaftovedeniye”. Among the classical followers of this approach, there were L.. S. Berg, N. A. Solontsev, A. G. Isachenko, F. N. Milkov, D. L. Armand, V. J. Preobrazhensky, A. I. Perelman, N. A. Gvozdetsky. The second is the system paradigm, which develops as a modification rather than opposition to the first approach. In this aspect, studies of systems (geosystems) have become a new cognitive criterion. Its principal assumption is the holistic concept of nature. Studies of the landscape as a geosystem present the structuraldynamic and functional aspects. This trend is widely noticeable in papers by authors of landscape syntheses created within the scope of interdisciplinary landscape ecology, which is very popular currently (papers by A. Richling, M. Pietrzak, K. Ostaszewska, J. Solon, Forman and Godron, W.B. Soczawa, among other authors). The third is the humanist paradigm, which develops along with the system paradigm. It points out the role of man in the process of landscape shaping and its cultural conditions in a particular environmental context, thus referring to the idea of unity of nature and culture. It is based on papers by leading possibilists, including P. Vidal de la Blache (1922), and the so-called landscape approach, represented in Polish geography by S. Nowakowski, M. Dobrowolska, F. Bujak, or J. and F. Plit, among others. Coexistence of those paradigms results in discrepancies in understanding and interpretation of the landscape. The presentation will show the current stage of research and prospected further studies of cultural landscape resulting from the possible combination of the classicist approach of humanist geography and use of new research methods and sources.