ODRES (output driven requirements engineering)method, which is being developed in the department of information systems comprises the following stages: separating out the context, specification of function results, specification of data sources, specification of data source processing, modelling, automatic projectionof interface of information system and prototype. While creating requirement specification, there arises a need to evaluate the quality of it. In every stage of creating requirement specification an analyst does not know if he or she has got enough information in order to do produce a working prototype of the system. Therefore, in this study the problem of information system is analysed, namely, the problem of how to hallmark the quality of ISRS? How to measure this quality? What must the IS be, so that it is of good quality? While seeking to evaluate the quality of RS, it is necessary to understant and analyse what is quality on the whole, how it is defined, how it is measured and if it is possible to measure it at all. In this study methods which are used to measure the quality and the possibilities of CASE tools to evaluate specification quality are analyzed. In the research requirements to evaluate the RS quality have also been established and the experiment that realizes the RS quality evaluation has been done.