A regional business school chose to self develop an assessment test of the fundamental concepts of the undergraduate business core. Above and beyond the demands of AACSB accreditation, faculty identified feedback from such a test as an essential precursor to changing both overall curriculum and individual class content. The authors describe the methodology used to construct this instrument. Internal consistencies and validities of the resulting test compared favorably with those of commercially constructed tests. The authors discuss the methodology and results of the test validation process as well.