Strona 1 Wroctaw University of Economics l lelena Dudycz PhD Wroclaw 261h March 2012 Institute or Business Inlormatics Wroclaw University of Econornics Kornandorska Str. 118/120. PL 53-345 \\ roclaw. Poland e-mail: helena.dud\cÚ.~ue.\-Vroc.pl phone: 48 507 140 4!C Reference Mrs Grzegor> Michalski, PhD. prepared the expert appraisement as the part of my research real ized with grant I receiv ed from Pol ish Ministr) of Science and lligher Education. The Expert appraisemcnt were made for the ontology crcated by myself on the following subjects: "The Return on Investment lndicator" and "The Early Warning System for Production Enterprises". 1 deeply recornmend Mrs Michalski as a conscientious and thoughtful specialist. ). ,