As achieving high quality means the realization of customers needs requiremtens engineering (RE) is the most crucial phase within software development. During RE not only the functional but also the so-called ‘non-functional’ requirements of the planned software system have to be elicited from the customer and presented in a requirements document in order to provide the software designer with a complete and correct specification. Requirements engineering is a process during which the user and engineers have to find a way from an initially opaque and diverse system understanding towards a complete, agreed and at least partially formalized system specification. A multitude of methods from software engineering, ethnology, social science, and psychology have been adapted, combined or/and supported by tools to achieve requirement specifications of higher quality. The REFSQ workshop series provides a platform for discussing and presenting such methods as well as their integration.