In the actual operation of the enterprise management, production management is usually closely around production plans. Based on sales plan (or sales order), production plan makes quantitative arrangement of production task as well as providing purchase plan. Clearly such plan are not only used for prodcution management, but also become the core of the entire internal management of the enterprise. Obviously, different enterprises in different industries will have relatively different production management methods, which extend different plan management models. UFIDA ERP-U8 includes these various management models to meet the requirements of different enterprises production management.