Sep 2026· Zenodo (CERN European Organization for Nuclear Research)
Abstract
General Behavior Calculus (GB-Calculus) represents an effort to formalize the mathematical language used within General Behavior into a consistent and extensible specification. The objective is not to claim that the calculus is complete or that every component has reached its final form. Rather, this work establishes a stable reference point from which the notation, transformations, state relationships, interval structure, and geometric correspondence can be communicated, examined, tested, implemented, and further developed. Formalization became necessary as the framework increased in scope. A shared mathematical specification provides a basis not only for teaching and communicating General Behavior, but also for allowing others to critically evaluate its internal structure, reproduce its relationships, identify limitations, propose improvements, and extend the framework through future research. Establishing explicit types, operators, equations, constraints, and indexing conventions also provides the structure required to translate GB concepts into computational representations and software implementations. This specification should therefore be understood as a foundation rather than an endpoint: a defined version of GB-Calculus upon which subsequent theoretical, empirical, and computational work can build.
This publication proposes a definition and a classification of agile software development approaches and analyses ten software development methods that can be characterized as being "agile" against the defined criterion.
P. Abrahamsson, O. Salo, Jussi Ronkainen et al.· arXiv.org· 727 citations· ⚡54
The study shows that agile practices improve both informal and formal communication, but indicates that, in larger development situations involving multiple external stakeholders, a mismatch of adequate communication mechanisms can sometimes even hinder the communication.
M. Pikkarainen, Jukka Haikara, O. Salo et al.· Empirical Software Engineeri...· 401 citations· ⚡48
The results indicate that software engineering work practices are chosen opportunistically, adapted and configured to provide value under the constrains imposed by the startup context.
Nicolò Paternoster, Carmine Giardino, M. Unterkalmsteiner et al.· Information and Software Tec...· 394 citations· ⚡54
The results show that the embedded industry has been able to apply agile methods in its development processes and that the appreciation of the agile methods and their individual practices appears to increase once adopted and applied in practice.
O. Salo, P. Abrahamsson· IET Software· 238 citations· ⚡9
Consequences of happiness and unhappiness that are beneficial and detrimental for developers' mental well-being, the software development process, and the produced artifacts are found.
D. Graziotin, Fabian Fagerholm, Xiaofeng Wang et al.· Journal of Systems and Softw...· 236 citations· ⚡13
The Mobile-D approach is briefly outlined here and the experiences gained from four case studies are discussed, which helped develop an agile development approach for mobile application development.
P. Abrahamsson, Antti Hanhineva, H. Hulkko et al.· Conference on Object-Oriente...· 225 citations· ⚡18
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