The goal of the workshop was to exchange ideas and experiences related to Model (Co-)evolution and Consistency Management (MCCM) in the context of Model-Driven Engineering (MDE). Contemporary MDE practices typically include the manipulation and transformation of a large and heterogeneous set of models. This heterogeneity exhibits it self in different guises ranging from notational differences to semantic content-wise variations. These differences need to be carefully managed in order to arrive at a consistent specfication that is adaptable to change. This requires a dedicated activity in the development process and a rigourous adoption of techniques such as model differencing, model comparison, model refactoring, model (in)consistency management, model versioning, and model merging. The workshop invited submissions from both academia and industry on these topics, as well as experience reports on the effective management of models, metamodels, and model transformations. We selected ten high-quality contributions out of which we included two as best-papers in the workshop reader. As a result of the high number of participants and the nice mix of backgrounds we were able to debate lively over a number of pertinent questions that challenge our .field.