Themanufacturing industry is moving from linear and material-intensive businessmodels toward a more circular economy that effectively uses available resourcesto enhance both profits and sustainability. This new circular economyemphasizes offering advanced services rather than pure goods. Transitioningfrom product to service sales provides multiple possibilities to introduce circular business models, where new forms of value can be created for providers, their customers, and other actors in the ecosystem by utilizing resources more efficiently.Companies need to develop the business models from a ecosystem perspective that involves effectively distributing responsibilities and closely integrating activitiesthroughout the ecosystem. In contrast, current business model practices are often too firm-centric and consider a single firm as a relevant unit, despite the fact that a network of ecosystem actors, such as providers, customers, service partners, and digital actors, are necessary to realize a total offer and for sustainability effects to materialize. Therefore,important questions about the distribution of activities, roles, cost- and revenue sharing, value creation and capture, and procurement are currently left unanswered. In sum, due to these problems, current methods for ecosystem business model development often fail to live up to the full sustainabilit ypotential of advanced services. Thus, we argue for need to develop and test method sfor circular or advanced service business models that is valid from an ecosystem perspective