The goal of the CPSM workshop is to bring together researchers and practitioners in the area of Business Process (re)design and software maintenance, to discuss about and exchange ideas on quality, understandability and maintainability of business process models, of software models, and of the relationships between BP models, software models, and system implementation. The workshop will focus on model understandability, complexity of modeling languages, actual usage of language features, cognitive aspects in modeling languages, human perception and subjective perspectives on models, impact of professional roles and of cultural background on model understanding, and related issues. The workshop will be a multi-disciplinary forum for discussing about impact of models on understanding and communication between people.