EN
The paper presents results of research into challenges, barriers, and difficulties in the business operation of enterprises following Poland's accession to the EU. The leading research questions of the project included an assessment of the implementation of systems and instruments for early warning of enterprises against corporate threats. Research focused on models to predict bankruptcy - carried out previously (i.e. at the turn of the 1980s and 1990s) in the framework of the Institute of Economic Sciences, Polish Academy of Sciences - served as a reference point for the current research results (models constructed on the basis of the institute's research are included in an annex to this paper). The comparative analysis demonstrated that significant progress has been made in the practical implementation of the early warning models as compared with the previously analyzed period.