Applying Bayesian Data Analysis for Causal Inference about Requirements Quality: A Controlled Experiment

• URL: http://arxiv.org/abs/2401.01154v2
• Date: Mon, 1 Jul 2024 08:20:02 GMT
• Title: Applying Bayesian Data Analysis for Causal Inference about Requirements Quality: A Controlled Experiment
• Authors: Julian Frattini, Davide Fucci, Richard Torkar, Lloyd Montgomery, Michael Unterkalmsteiner, Jannik Fischbach, Daniel Mendez,
• Abstract summary: It is commonly accepted that the quality of requirements specifications impacts subsequent software engineering activities. We aim to contribute empirical evidence to the effect that requirements quality defects have on a software engineering activity.
• Score: 4.6068376339651635
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: It is commonly accepted that the quality of requirements specifications impacts subsequent software engineering activities. However, we still lack empirical evidence to support organizations in deciding whether their requirements are good enough or impede subsequent activities. We aim to contribute empirical evidence to the effect that requirements quality defects have on a software engineering activity that depends on this requirement. We conduct a controlled experiment in which 25 participants from industry and university generate domain models from four natural language requirements containing different quality defects. We evaluate the resulting models using both frequentist and Bayesian data analysis. Contrary to our expectations, our results show that the use of passive voice only has a minor impact on the resulting domain models. The use of ambiguous pronouns, however, shows a strong effect on various properties of the resulting domain models. Most notably, ambiguous pronouns lead to incorrect associations in domain models. Despite being equally advised against by literature and frequentist methods, the Bayesian data analysis shows that the two investigated quality defects have vastly different impacts on software engineering activities and, hence, deserve different levels of attention. Our employed method can be further utilized by researchers to improve reliable, detailed empirical evidence on requirements quality.

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