ABSTRACT In this article the focus is how to train collaboration and communication between emergency authorities in two countries (Norway and Sweden) by using a web-based tool supporting tabletop like exercises. The exercises are accomplished in three steps: Scenario design; exercise design and realization; and evaluation to examine the results of the exercises and for feedback to new scenario designs. The software ties all three steps together. The process is iterative, and involves users from each emergency authority. The preliminary results after two years show that the approach is promising. To be able to better foresee what will happen during an exercise the need for a simulator has appeared as one desirable and possible direction for further research