Abstract: Software development methods (SDMs) are valuable but not a panacea. If selected and used correctly, they can provide great benefits; if regarded as magic solutions or otherwise misused, they can prove to be an expensive failure. Recently in software engineering practice, a systematic mismatch phenomenon between Object-oriented Software Design Method (OOSDM) and Visual Programming (VP) has been observed, but this mismatch phenomenon has been strangely neglected by academia. Therefore, this paper focuses on the suitability of OOSDM, while its purpose is to argue the un-match between OOSDM and VP from the viewpoint that `a blueprint must be followable.` Moreover, this paper also presents a series of in-depth interviews conducted to validate the correctness of the proposed arguments.