Internet-based total automation is proposed as a solution for manufacturing enterprises, which face constant changes in their markets, customer demands and business practices. When major changes occur, such enterprises require re-engineering of their information systems. This involves handling large numbers of functional objects and regulating many enterprise activities over three application levels: the device level for production control, the plant level for production execution and the enterprise level for production planning. This paper suggests an Internet-enabled automation solution based upon a simple enterprise model developed by the authors. The model, solution architecture and methodology are presented together with case studies.