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This paper reports on a study aiming to investigate the possible potential of using Fermi problems to introduce mathematical modelling to Swedish upper secondary school students. Three groups of students- work on realistic Fermi problems were analysed using an analytic tool, referred to as the -modelling activity diagram-, adapted and developed by the author. It was observed that the processes involved in a mathematical modelling cycle were richly represented in the problem solving processes of the groups. The students also frequently used their personal extra-mathematical knowledge in the solving process in three different ways; a creative, a verifying and a social way.

Recently, network organizations have been suggested as a solution for future crisis management and warfare. This will, however, have consequences for the development of decision support and critiquing systems. This paper suggests that there are special conditions that need to be taken into account when providing the means for decision-making in networked organizations. Hence, three research problems are suggested that need to be investigated in order to develop useful critiquing systems for future command and control systems.