The domain of this research are CASE tools, designated for requirements engineering, which are able to generate computerized information system prototypes. The main goal of this project is to design software, which would enable to generate an IS prototype from requirements specification, created re specification method, suggested by the Information Systems department. The software is a part of a CASE tool, designed by the IS department. The CASE tool is designated for creating requirements specification and the software will provide additional functionality to it. The opportunities of computerized IS prototyping using Oracle Designer, Visual FoxPro and MS Access were analyzed. In case of Oracle Designer, in order to create a computerized IS prototype we have to go through the whole design stage. In case of DBMS Visual FoxPro and MS Access we must have a database designed. And the software for generating computerized IS prototype enables you to generate a system prototype at an early design stage and without having the system project.

In the early stage of building a new informational system requirement engineering involves all the processes related to the requirement system and research of problems emerged during this process. In this stage the requirements specification of corresponding information system are built. Many different notations serve for this purpose, selection of which is dependant on available resources and project goals. Requirements specification must be of good quality. It is evaluated by characteristics of quality. Specifications could be analyzed and improved by using various tools including CASE tools. The specification is developed and its quality is improved by making analysis of requirements. Well done specification is basis for creating high leveled functionality system.

Šiame magistro baigiamajame darbe yra nagrinėjama, kaip ir kokiu mastu, struktūrinant reikalavimus pagal J.A.Zachmano karkasą ir panaudojant Toronto grupės pasiūlytą nefunkcinių reikalavimų dekomponavimo metodiką (NFR), galima bent iš dalies formalizuoti reikalavimų nuleidimą iš verslo lygmens į programų sistemos lygmenį. Darbo teorinėje darbo dalyje, remiantis atliktos mokslinės literatūros analizės rezultatais, pasiūlyta kaip pritaikyti Toronto metodiką reikalavimams nuleisti iš verslo į programų sistemos lygmenį Zachmano tipo karkasuose. Darbo eksperimentinėje dalyje šie pasiūlymai patikrinti praktiškai, atliekant konkrečios sistemos reikalavimų nuleidimą iš verslo į programų sistemos lygmenį. Tyrimo rezultatai parodė, kad NFR metodika tinkama ne visų reikalavimų nuleidimui žemyn, nes joje yra per silpnos dinamikos modeliavimo priemonės. / The aim of the master thesis is to investigate possibilities to use the NFR (non-functional requirements) approach proposed by Toronto group to perform the flowdown of requirements from business to software level in the methodical requirements engineering frameworks that organize requirements in a way similar to the J.A. Zachman’s Enterprise Architecture. Using results of the library research, the theoretical part of the thesis proposes a methodology how to apply NRF approach to perform flow down of the higher level requirements to lower ones in cases when requirements are organized according to principles proposed by J.A. Zachman. The experimental part of the thesis is devoted to the validation of the proposed approach using a simplified banking system example. The main conclusion of the thesis is that the NFR approach is applicable only to some part of requirements because the modelling means provided by this approach are not sufficient to model the system dynamic.