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- ItemInvestigating the Causes of Non-realization of Project Prediction and Proposal of a New Prediction Framework(Prague University of Economics and Business, 2024-08-22) Doskočil, Radek; Lacko, BranislavThe main goal of the paper is to identify the causes of non-realization of project prediction and to propose a new framework for project prediction. A secondary goal is to explain why the approaches to project prediction used currently do not provide satisfactory results. The research was realised in the form of qualitative research using semi-structured interviews. The findings reveal that the main causes of non-realization of project prediction are follows: there is no methodology that could be practically used; simplified approaches to project prediction usually have low reliability for which reason they are generally unusable; suitable input data and information for project prediction are not available. The main contribution made by the paper is the identification of causes of non-realization of project prediction and the proposal of a new framework for project prediction that respects changing conditions during the lifecycle of the project and changes in the way of thinking in project prediction. A prerequisite for its application is a functioning system of knowledge management in projects, including the realization of post-project analysis.
- ItemPerformance of Family Businesses in the Specific Conditions of CEE Countries: The Case of the Czech Republic(SAV SR, 2024-08-23) Režňáková, Mária; Karas, Michal; Srbová, Pavla; Pěta, Jan; Michalíková, EvaMany authors point out that family businesses in the CEE region due to a dif-ferent historical development might exhibit specific features and because of that deserve specific attention. The presented paper aims to contribute to this effort by exploring factors driving the performance of family businesses in the Czech Republic, in course of the research a panel of 7,995 businesses was analyzed by using the linear mixed effects model. The common problem of missing data, especially on micro-enterprises, was addressed by using CHAID methodology. We found that the factors driving family business performance differs between micro and SMEs segments of businesses, while the effect of families is most significant in terms of the model’s slope rather than constant.
- ItemGreen public procurement in the most visited European museums: a comparison and a mapping(SPRINGER NATURE, 2024-03-13) Plaček, Michal; Rossel, Jordi; Valentinov, Vladislav; Křápek, MilanWhile scholarly research on green public procurement (GPP) keeps growing, until now it has paid little attention to museums that must make decisions about GPP implementation. This paper breaks new ground by exploring GPP implementation in the most visited European museums. The proposed conceptual framework allows a comparison and a mapping of museums' GPP implementation levels while taking account of how these levels are related to the national GPP performance. Complementing this framework with the analysis of the up-to-date data from the Tender Electronic Daily database yields two central findings. First, museums that formalized their GPP policies in their strategic organizational documents exhibit higher levels of GPP implementation than other museums that have not done so. Second, the majority of the investigated museums follow national trends of GPP implementation, with examples of exceeding or falling below these trends being rare. The article is important for policy makers and practitioners as it highlights the importance of the factor of institutionalization of green procurement in individual organizations, which is crucial for successful implementation of green procurement.
- ItemModelování Phillipsovy křivky s podporou systému Maple(Česká společnost pro systémovou integraci, 2012-05-02) Novotná, Veronika; Luhan, JanTato práce představuje možnosti, které nabízí software Maple při řešení ekonomického modelu pomocí diferenciálních rovnic. Článek se zabývá modelem, který vyjadřuje vztah mezi mírou inflace a mírou nezaměstnanosti a který se stal známý jako Phillipsova křivka. Ekonomická teorie je popsána v úvodu kapitoly a slouží jako podklad pro formulování vztahů ekonomických veličin, které jsou dalším předmětem výzkumu. Z hlediska matematiky vede model k řešení systému obyčejných diferenciálních rovnic. Dále jsou v článku popsány některé základní nástroje pro práci s diferenciálními rovnicemi v Maple. V závěru dokumentu je uveden příklad řešení matematického modelování Phillipsovy křivky s podporou systému Maple.
- ItemAn evaluation of total project risk based on fuzzy logic(Vilnius Gediminas Technical University, 2016-01-01) Doskočil, RadekThe article deals with the use of fuzzy logic as a support of evaluation of total project risk. A brief description of actual project risk management, fuzzy set theory, fuzzy logic and the process of calculation is given. The major goal of this paper is to present am new expert decision-making fuzzy model for evaluating total project risk. This fuzzy model based on RIPRAN method. RIPRAN (RIsk PRoject ANalysis) method is an empirical method for the analysis of project risks. The Fuzzy Logic Toolbox in MATLAB software was used to create the decision-making fuzzy model. The advantage of the fuzzy model is the ability to transform the input variables The Number of Sub-Risks (NSR) and The Total Value of Sub-Risks (TVSR) to linguistic variables, as well as linguistic evaluation of the Total Value of Project Risk (TVPR) – output variable. With this approach it is possible to simulate the risk value and uncertainty that are always associated with real projects. The scheme of the model, rule block, attributes and their membership functions are mentioned in a case study. The use of fuzzy logic is a particular advantage in decision-making processes where description by algorithms is extremely difficult and criteria are multiplied.