In this paper we present strategies for the use of multi-modal/multi-media input facilities at office workstations. Multi-modal/multi-media input facilities refer to the integrated and parallel use of different media. We have been mainly engaged with the integration of the medium speech into office workstations (speech workstations) under consideration of ergonomical criteria (human factors). In this connection we have developed techniques for testing and evaluating multi-media workstations. The test environment, results and resulting strategies are described.