This book constitutes the refereed post-proceedings of the 11th International Conference on Model-Driven Engineering and Software Development, MODELSWARD 2023, which took place in Lisbon, Portugal during February 19-21, 2023.The 8 full papers included in this book were carefully reviewed and selected from 41 submissions.

Applications and System Development.- A Hierarchical Design Tool for SystemC AMS.- Generating Custom Learned Cost Model for Query Optimizer of DBMS.- Behaviour-Oriented OPC UA Information Model Development for CPPS.- Modeling Languages, Tools and Architectures.- Abstracting Complexity in MBSE Models InTra A Practical Approach for Rule Based Model Transformation.- UMLDS A Round Trip Engineering Support Tool to Avoid Unintended Design Changes.- An Expression Language for Model Transformations.- Challenges in Modeling and Unmodeling Complex Reactive Systems Interaction Networks, Reaction to Emergent Effects, Reactive Rule Composition, and Multiple Time Scales.- Improving Requirements in Model-Based Systems Engineering through Multi-layer Goal Models.