A B S T R A C TOrganizations are more and more involved into collaborations to face globalization, crisis situations or market demand. Consequently, they are strongly dependent on their collaborative processes and matching workflows, which have to be relevant and efficient through time. As collaborations and their context are now fast evolving, agility of collaborative workflows is now an unavoidable requirement. Several solutions have been developed to deal with this issue, but they often focus their monitoring on a single aspect of the collaboration and/or impose a single adaptation strategy to face the detected evolutions. This article describes a platform to support decisionmaking about the adaptation strategy to lead by: (i) taking into account and exploit relevant data gathered from the collaboration itself and its environment (context awareness); (ii) proposing relevant adaptation strategies to correct or improve the collaborative behaviour. Based on the solutions proposed by the platform, decisionmakers can choose the most appropriate adaptation tool to perform the selected adaptation strategy. As crisis responses are specific cases of collaboration in an unstable context of execution (short time to react, highly evolving environment), a proof of concept based on the Fukushima Daiichi nuclear disaster is developed to illustrate the use of the developed platform.