To cope with the emerging demand for individual products and services, new approaches for handling the individualization in dynamic supply chains are needed. Our object of investigation is to establish Situation-awareness (SA) in an assistant information system for supply chain partners to cope with individualization-driven demands. Our contribution is an event-driven architecture design to enable situational planning using the Situation Calculus upon distributed contextual information. Sensors raise events among supply chain partner’s information systems, which are combined to context events in order to derive situations on partner level. Our works follows the Design Science in Information Systems Research to design and evaluate the architecture design. The preliminary descriptive evaluation uses life stock transports as an example.