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Methodology for Managing of Enterprise Information System Complexity
Holub, Ilja ; Basl, Josef (advisor) ; Antlová, Klára (referee) ; Kopeček, Pavel (referee)
Complexity of business information systems (IS) and information and communication technology (ICT) in general is a challenge faced by both IT professionals and project managers, but also the users of these systems, whether as employees of enterprises and organizations or their customers, partners or suppliers. In this work we study the complexity and its manifestations in informatics. We review relevant literature to analyze the state of the art in methods and approaches used for building and maintaining business information systems. The main results of this analysis is realization that even though complexity is considered an important parameter that have a negative impact on performance of information systems, the current methods and approaches for IT system maintenance do not provide any tools for complexity evaluation or management. The author therefore based on existing approaches and methodologies is establishing his own definition of a metrics to measure the complexity of the information system. The complexity is defined as the sum of the individual entities of system UML models, which are selected according to the methodology MMDIS to consistently describe all relevant content dimensions of the system. Subsequently derives causal relationship between the complexity of each dimension. Both between each other in one phase of the life cycle of the information system and in time. The next section examines the reasons and mechanisms to increase the complexity of the corporate information system and identifies the causes, characteristics, stakeholders, processes and life cycle stages of the IS, which influence this growth. Next we investigate impact of IS complexity on its implementation and we identify the critical processes involved in day to day operation of IS, in its maintenance and in extending its functionality. The main aim of this dissertation thesis is to design a methodology for managing the complexity of the information system and its validation in practice on a real SAP implementation project. In addition, we provide a software tool written in ABAP programming language. This program can be used as a tool of the methodology for measuring SAP IS complexity.
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Agile methodologies in complex environment
Balada, Jakub ; Buchalcevová, Alena (advisor) ; Pitner, Tomáš (referee) ; Antlová, Klára (referee)
Only a small number of projects of information system development succeed. Agile methodologies have contributed to a higher level of success of specific projects developed by small teams. Nevertheless, most IT companies still refuse this approach with large-scale projects. This paper comments on the conditions that must be fulfilled for agile adoption, analyzes the limitation of such processes, and describes the approaches for the solutions of such problems with the focus on projects in a complex environment. By means of a case study, the next part of the paper shows the advantages of adopting an agile approach in a real project in a complex environment, which is in conflict with the so far presented limitations of this methodology. The project was evaluated as a success, primary, due to the implementation of the agile methodology during the development phase. This implementation helped meet all the project deadlines, accelerate bug-fixing, and especially deliver functionalities which brought an additional value to the customer. Based on the findings of the case study, the procedures and practices extending the chosen agile methodology are defined. Such procedures and practices can be used in other projects in complex environments in the future. Thus, the paper shows more options for the use of these methodologies, which may help its wider use in the future and hence increasing the success of projects focused on the development of information systems. Such situation would lead to an effective interconnectedness of ICT and business strategies, especially due to the flexible delivery of currently needed ICT services.
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The solution of digital archive integrity using relative time authentication
Vohnout, Rudolf ; Říhová, Zora (advisor) ; Antlová, Klára (referee) ; Macek, Martina (referee) ; Klimeš, Cyril (referee)
The research objective of the dissertation is a phenomenon of electronic documents archivation in long-term timeframe with focus on their security and integrity. This work at the begging deals with research issues of current approaches and solutions in the specified topic and focuses on relationship examining of the long-term archivation on restrictive conditions set by currently valid legislation scope. The main focus is on the archive integrity by means of alternative methods not related on absolute archival time. Design part deals with creation of the universal system solution leading to ensure non-repudiation of entrusted, archive managed, objects. This draft was empirically verified and results were processed and evaluated by means of statistics methods. The presented proposal of this work endeavors contribution to strengthen legal and evidence equivalence of long-term archived electronic documents on the same level of their paper siblings.
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ritical success factors of Enterprise Resource Planning Systems in Small and Medium Sized Enterprises
Skřivánek, Václav ; Basl, Josef (advisor) ; Antlová, Klára (referee)
The topic of this diploma thesis is "Critical success factors of Enterprise Resource Planning Systems in Small and Medium Sized Enterprises" Firstly, the terms enterprise resource planning system, small and medium sized enterprise and critical factor are defined. Part of this thesis is also dedicated to the importance of those systems in small and medium sized enterprises and the supply of products on the market is described as well. The importance of enterprise resource planning systems for this segment of customers is still growing and the number of products offered is quite wide. Customers have unambiguously preferred Czech solutions. Next part of the thesis contains critical factors literature search -- analysis of two studies. Conceptual model of critical factors is made on the basis of findings and comparison of those two studies. The relevance of this model is verified by the analysis of case studies of enterprise resource planning system implementations in small and medium sized enterprises. These case studies were downloaded from websites of system vendors. On the basis of new findings, new model was designed. Each critical factor is described in each part of the thesis to help understand under which circumstances it was used. Finally, the model is assessed.
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