Online appendix

This online appendix, complementing the research article "The Impact of Requirements Artifacts on Efficiency in Agile Development: A Case Study" [1], contains two files: A PDF-file containing tables with additional statistical test results ("Results online appendix.pdf"); An Excel-file containing user story data concerning quality criteria, number of acceptance criteria and number of test cases ("Data online appendix.xlsx"). [1] Molenaar, S. and Dalpiaz, F. "The Impact of Requirements Artifacts on Efficiency in Agile Development: A Case Study", in Proc. of 33rd IEEE International Requirements Engineering conference, 2025.