The dynamic landscape in which these PROs operate, with its strict environmental regulations and reporting requirements, and its rapidly evolving market of new products and technologies, requires adapted business models, flexible processes, effective technological support and sustainable collaboration agreements. In addition, we want to implement the circular economy by delivering consultancy to various core actors. We want to help private organizations to continue and implement the closed-loop and cradle-to-cradle through PROs. Sustainability is gaining on importance, but is rarely seen today as part of the core business. From our knowledge, we also want to examine with producers how sustainability can go along with profitability.