Drip irrigation introduction is stimulated in many countries because of its renowned efficiency. Yet, from the academic debate on efficiency complexity, it is clear that efficiency terminology is scale and context specific. Rather than studying drip irrigation with a pre-defined scale of analysis, this thesis focuses on how efficiencies, and their assumptions about scales and context, are used in irrigation projects and descriptions of drip irrigation performance. This PhD study searches for alternative ways of understanding performance which are more processual and less prescriptive. It does so in the context of a farmer managed irrigation system, the Seguia Khrichfa in Morocco, where drip irrigation performs in many different ways: it re-orders social relations; re-configures the water distribution; plays a role in creating identities; and much more.