This chapter presents a methodology for identifying stakeholders and their influential variables in typical energy communities. The first step consists in identifying and qualifying the stakeholders before pinpointing their influential variables. As this identification aims to complement libraries of models in design decision support tools, a second step consists in dividing these variables into constraints and objectives, and then, if possible, transforming them into quantitative indicators. This methodology is applied to a photovoltaic energy-sharing project. The whole project highlights the impact of influential variables on the shape of a community energy project. It demonstrates that an over-constrained problem could lead to a relaxation of constraints or a change of assemblage, in other words, changing the technical system and/or the stakeholder responsible for it, defined as socio-energy nodes. The conclusion posits the right use of design tools in the dynamics of socio-energy projects involving stakeholders - with their objectives, wishes and constraints - and technical systems, laws and regulations, with their constraints. The outcome is also an illustration stemming from a research approach at the interface of social science and engineering.