1 Introduction  
2 Related Work  
2.1 Empirical Studies on Agile RE  
2.2 The NaPiRE Initiative  
3 Survey Design  
3.1 Research Questions  
3.2 Instrument  
3.3 Data Collection  
3.4 Data Analysis and Validity Procedures  
4 Results  
4.1 Study Population  
4.2 Elicitation and Documentation (RQ 1)  
4.3 Changing Requirements (RQ 2)  
4.4 RE Improvement (RQ 3)  
4.5 Problems in Agile RE (RQ 4)  
5 Conclusions and Future Work