Design science research (DSR) projects encounter challenges to satisfy the differing aspirations and requirements of practitioners and researchers in the design of complex sociotechnical system solutions. We analyze the tensions that exist in projects that require collaborative evolution of information systems artefacts that must provide convincing evidence of goal satisfaction for different stakeholder groups. We propose an innovative model of DSR project progress grounded on the concept of managed evolution with focused attention on the evolving dimensions of fitness to practice and validity to research. Each cycle of the DSR project will generate new scientific knowledge and practical impacts in measured contribution pathways. To implement this model, we design a process with well-defined points of practitioner-research negotiation to ensure that project goals are managed and achieved. Actionable guidance supports a rigorous approach for balancing and realizing the varied stakeholder aspirations for sociotechnical system solutions. We conclude with a demonstration project and the implications of this new vision for managing the dynamically managed evolution of DSR projects to achieve both scientific contributions and practical impacts.