Abstract: A system and method for integrating a business transaction processing system with a process control system provides a computer integrated manufacturing environment. The manufacturing execution system receives work orders from the business transaction processing system and obtains enrichment data to enhance the work order. The manufacturing execution system uses the enrichment data and rules contained in a plant model database to generate setpoints based on the received work orders. The setpoints include detailed information required by the process control system to manufacture the product specified by the work order. The setpoints are transmitted to the process control system for manufacture of the required materials. The manufacturing execution system collects the manufacturing data resulting from the execution in response to the work order by the process control system and processes this manufacturing data to provide summary information on manufacturing processes and to provide inventory information data.