Abstract: The method and model for enterprise system development is a software computing system embodied in a method and system that provides for user inputs from a GUI, and specifies a plurality of functions related to a plurality of business entities. Business requirements of the enterprise are defined by establishing relationships among the plurality of business entities. The relationships among the plurality of business entities are interpreted. A plurality of actions is applied to the plurality of functions based on the interpretation of the business entity relationships, creating a plurality of logical entities. Activity rules related to the plurality of logical entities are specified. The plurality of functions is executed in a workflow determined by the plurality of activity rules to apply business requirements developed by the system. Global security levels are included to provide control of collaboration over the system in a dynamic and flexible way.