The Mexican policy of Irrigation Management Transfer has been widely propagated as a success and has become a model for other countries seeking to improve the performance of their irrigation systems while also cutting public expenditures. This article analyses the process of policy-making that has generated the policy model and follows the practices, means, and events through which it has achieved increasing transnational circulation, popularity, and support. The main argument of this article is that the success of a policy model is only a success within the cultural and ideological understandings of a policy network and given the means, practices, and events that generate and disseminate it. This particular case further suggests that success in policy-making, rather than being based on straightforward evidence of improved management performance, is often part of a cultural performance.