[영문]We compare the performance of organizational forms (M-form and U-form) in experimenting with uncertain projects. In our framework, organizational forms affect the information structure of an organization and thus the way to coordinate changes. Compared to the U-form, the M-form organization achieves better coordination in “attribute matching” but suffers from coordination in “attribute compatibility” and less gains in specialization. The distinctive advantage of the M-form is its flexibility in choosing between small-scale and full-scale experimentation