Title of the thesis:Metric-Based Modularization of Products in a Circular Economy - Meta-Model and Framework for Customer-Centered Engineering Process Doctoral student: Dan Lennartsson Third-cycle subject area: Production Systems Faculty examiner: Professor Dag Henrik Bergsjö, Chalmers University of Technology Examiner: Associate Professor Malin Löfving, School of Engineering Principal supervisor: Professor Ulf Seigerroth, School of Engineering