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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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Technological integration of ICT services
Jelínek, Martin ; Šebesta, Michal (advisor) ; Holub, Ilja (referee)
This thesis deals with the integration of ICT services at the technological level. It mainly focuses on the integration of services which are provided by third parties and a user cannot change them. In this work are described the characteristics of web services and the typical methods for designing their application interface. Furthermore, are described various approaches to integration of applications at the technological level and some integration tools. As part of this thesis, was also created an application designed for integration of web services. This application can be categorized as message-oriented middleware. The aim was to create a simple application, which still meets basic requirements for this kind of applications. This thesis also contains a description of the created application and a description of problems that occurred during implementation. During the application development were used some integration design patterns, which are also described in this thesis.
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Access and communication security in SAP information systems
Karkošková, Soňa ; Bruckner, Tomáš (advisor) ; Holub, Ilja (referee)
This diploma thesis deals with the methods used to ensure access and communication security in large-scale SAP information systems. It deals with the analysis of existing methods, compares them, and identifies how the methods are usable in the operation of large-scale SAP information systems, as well as it identifies methods that fail in this environment. Justification of methods usability is carried out. Attention is focused on the use and implementation of single sign-on safe authentication methods, secure sharing of user identity and secure communication within the framework of a large-scale SAP information system. In this thesis is carried out a design proposal of the architecture in order to ensure access and communication security in SAP information systems using the LDAP service, SNC Kerberos and single sign-on authentication. In the practical example is documented the detailed technical implementation of this architecture. Furthermore, this thesis deals with the specifics which exist especially in large-scale SAP information systems in the area of access and communication security and documents the appropriate ways to address them.
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Corruption and public contracts in the field of ICT
Nejedlý, Václav ; Holub, Ilja (advisor) ; Bruckner, Tomáš (referee)
The bachelor thesis deals with the problem of corruption and public contracts in the field of ICT. The work focuses on the corruption situation in the Czech Republic, generally on corruption and laws relating to public contracts. The goal of this project was to unify the information on public procurement and to demonstrate the corruption situation in the Czech Republic on particular examples. The work presents to the analysis of the individual contracts uncovering of corruption in these cases and making proposals to improve the situation in the form of amendments to the Public Procurement Act. Meeting these goals required the search for information on suspect contracts on the Internet, browse closely the Public Procurement Act and the knowledge of the author's own experience. In the introductory part the author defines the concepts of law in the field of public procurement, laws and regulations dealing with public contracts, the authority supervising the Public Procurement Act, procurement processes in various types of contracts and the work of anti-corruption police departments. In the following section of the theoretical part, the author discusses the general problem of corruption and corrupt practices in the field of ICT .The analysis of Public Procurement Act is the last chapter of the theoretical part of the work. In the following practical part, the author discusses several examples of contracts that have been or have not been proven corrupt or illegal and compares expenses of the ICT projects in the private and public spheres. In the last chapter, after obtaining all available information, the author proposes several ideas for improving The Public Procurement Act The author's contribution of the work lies in a clear summary of information, referring to the errors in the procurement processes and then in the analysis of the situation of the "suspicious" cases and detection of illegal conduct, in these cases. The author came to the knowledge that allow the conclusion to summarize in a few paragraphs incentives for the development of amendments to applicable laws of the relevant authorities.
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Stakeholder management in ICT projects
Holub, Ilja ; Chocholatý, Drahomír (advisor) ; Lanz, Edvard (referee)
This work deals with the questions of the analysis and management of the parts engaged in information and communication technology projects. The stakeholder (the term "stakeholder" is used in Czech as well) is a subject, i.e. an individual or a corporate body, that is concerned about the result of the project and has the possibility to influence the project. The main goal of the thesis is to map the contemporary approaches toward the stakeholders analysis and management in the ICT projects, to analyze the problems of the influence of individual parts from both technocracy and human (psychological) point of view and to subsequently suggest the methodology for an effective analysis and management of the engaged parts, which could be used at the management of the projects in the ICT field. It is convenient to introduce the used terms and notions , their history and the way of use in the first part. There are dissect the known methodologies and tools used for the analysis and the management of the engaged parts. Subsequently, the stakeholders are systematically divide, it is accomplished their analysis from different perspectives and discussed mainly the aspects which can be crucial in the project management. The most common interests and motivations of the particular engaged parts are presented, including the influence and interest groups and the ways how to procure these parts for the aims of the projects. In the second part a research is described, which is carried out among managers of ICT companies and participants of ICT projects. There are elaborated some hypotheses on grounds of practical experiences from ICT projects and these are verified by this examination. The third part is focused on the presentation of the methodology for the analysis and the management of stakeholders in the ICT projects, which should serve the project managers for the stakeholders analysis and management in the ICT projects. Practical use of this methodology in the project of the SAP system implementation is described in the last, fourth part. This thesis completes relevant sources with the practical experiences at work on the projects in the ICT field. The effected research attested the original notion that this issue is relatively little known in the Czech Republic. The outcomes of this work could be of use for the project management in the ICT field.
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