SMAG (Self-Modelling for Assessing Governance) is a participatory tool developed by IRSTEA in the frame of the SPARE Project. The objective of this tool is to model and analyse the governance process of a river basin over the past 30 years. This document is composed of two parts: • Part 1, including annexes 1 to 5, introduces SMAG guidelines and is destined to SMAG users. It provides the instructions and the support materials that are required for organizing a workshop for 4 to 8 participants. • Part 2 traces back the evolution of the tool and the modelling choices made. It is targeting internal audiences (SPARE partners and researchers).