The practice of ECDL testing system analysis in the Intitute of Information Technologies is presented in this work. By analyzing modelling methods, LAP (Language/Action Perspectyve) was chosen for the system analysis. The main feature of Language/Action method is process loop, i.e. beginning of process is linked to process ending or emerged problem is linked to solution results. By analyzing the system using another methods, information flows are optimized according to chosen criteria, however these methods doesn’t take into account user convenience. In Language/Action method every communication is treated as four phases loop: preparation, negotiation, performance, acceptance. Every phase can be divided into smaller phases, which in turn can be treated as independent communication loops. After system modelling using LAP method, some workflows where decided to improve.

The introduction of the dissertation gives a short overview of the scope of the research. The first chapter discusses the ways and methods of business process modelling and gives summary on exception types and their nature. The second chapter discusses in detail the exception models, occurring in e-business processes. The third chapter describes the results of the research on handling exceptions in B2C environment. The last, fourth, chapter discusses the method of handling exceptions in B2B environment. At the end of the research the general conclusions are made.

The introduction gives a short overview of the scope of the research. The first chapter discusses the ways and methods of business process modelling and gives summary on exception types and their nature. The second chapter discusses in detail the exception models, occurring in e-business processes. The third chapter describes the results of the research on handling exceptions in B2C environment. The last, fourth, chapter discusses the method of handling exceptions in B2B environment. At the end of the research the general conclusions are made.

Darbe siekiama sudaryti metodiką, kuri leistų kurti informacines sistemas grindžiamas darbų sekų vykdymų. Norint pasiekti tikslą reikia išanalizuoti esamas kūrimo metodikas ir išsirinkti geriausias savybes, kurias panaudosiu naujos metodikos sudaryme. / In this paper work I am aiming to design a methodology that enables to develop information systems based on workflow execution. In order to achieve the objective I should to analyze the existing development methodologies and choose the best features, which I combine to create a new methodology.