Do External Feedback Loops Improve the Design of Self-Adaptive Systems?: A Controlled Experiment
2013 (English)In: Proceedings of the 8th International Symposium on Software Engineering for Adaptive and Self-Managing Systems, New York: IEEE Press, 2013, 3-12 p.Conference paper (Refereed)
Providing high-quality software in the face of uncertainties, such as dealing with new user needs, changing availability of resources, and faults that are difficult to predict, raises fundamental challenges to software engineers. These challenges have motivated the need for self-adaptive systems. One of the primary claimed benefits of self-adaptation is that a design with external feedback loops provide a more effective engineering solution for self-adaptation compared to a design with internal mechanisms. While many efforts indicate the validity of this claim, to the best of our knowledge, no controlled experiments have been performed that provide scientifically founded evidence for it. Such experiments are crucial for researchers and engineers to underpin their claims and improve research. In this paper, we report the results of a controlled experiment performed with 24 final-year students of a Master in Software Engineering program in which designs based on external feedback loops are compared with designs based on internal mechanisms. The results show that applying external feedback loops can reduce control flow complexity and fault density, and improve productivity. We found no evidence for a reduction of activity complexity.
Place, publisher, year, edition, pages
New York: IEEE Press, 2013. 3-12 p.
Research subject Computer and Information Sciences Computer Science, Computer Science
IdentifiersURN: urn:nbn:se:lnu:diva-25923ISI: 000327972300009ISBN: 978-1-4673-4401-2OAI: oai:DiVA.org:lnu-25923DiVA: diva2:623883
8th International Symposium on Software Engineering for Adaptive and Self-Managing Systems(SEAMS), May 20-21, 2013, San Fransisco