This paper presents a modular, groupware- and workflow based System called INFOFLOW. The system was designed to meet the requirements of a DIN EN ISO 9000 certified development and pre production plant. As a compromise between usage of standard software and a complete custom solution it is partly based on Microsoft Standard Office Software to increase end-users acceptance, supplemented by plugins and a self developed workflow engine. The workflow engine controls the production flow, esp. exception handling and distributes relevant information between the several clients. It especially supports exception handling like activity related, predefined rework sequences, or handling the scrapping of damaged parts. INFOFLOW integrates workflow and information technology providing the users with relevant activity and order related information elements The user interfaces are realized as electronic forms, embedded in Microsoft's Outlook Web Access folders, representing the activities or People involved in the production process. These Web applications, called iaelectronic worklistsli are created and distributed by the workflow engine. A mechanism to easily create and integrate user defined input forms allows the customization of the user front ends.