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El autor Danilo Caivano ha publicado 2 artículo(s):

1 - Assessing the influence of stereotypes on the comprehension of UML sequence diagrams: A family of experiments

Stereotypes are often used in industrial contexts and their application spans from use cases to class diagrams. Indeed, companies use stereotypes within their development processes to specialize general processes aiming to fit them to a particular technology in use, such as programming languages (e.g. C#, Java), application type (e.g. realtime, Web applications, client-server, standalone), reusable component used (e.g. Microsoft Foundation Class Library, Enterprise Java Beans Library) or simply to give more detailed guidelines to the practitioners involved in the system development processes.
Nevertheless, the influence of stereotypes on the comprehension of requirements models, such as UML sequence diagrams, had not been investigated yet. This fact motivated us to develop the research presented in this work.

Autores: José A. Cruz-Lemus / Marcela Genero / Danilo Caivano / Silvia Abrahão / Emilio Insfrán / José A. Carsí / 
Palabras Clave:

2 - Does the level of detail of UML diagrams affect the maintainability of source code?: a family of experiments

Although the UML is considered to be the de facto standard notation with which to model software, there is still resistance to model-based development. UML modeling is perceived to be expensive and not necessarily cost-effective. It is therefore important to collect empirical evidence concerning the conditions under which the use of UML makes a practical difference. The focus of this paper is to investigate whether and how the Level of Detail (LoD) of UML diagrams impacts on the performance of maintenance tasks in a model-centric approach. A family of experiments consisting of one controlled experiment and three replications has therefore been carried out with 81 students with different abilities and levels of experience from 3 countries (The Netherlands, Spain, and Italy). The analysis of the results of the experiments indicates that there isno strong statistical evidence as to the influence of different LoDs. The analysis suggests a slight tendency toward better results when using low LoD UML diagrams, especially if used for the modification of the source code, while a high LoD would appear to be helpful in understanding the system. The participants in our study also favored low LoD diagrams because they were perceived as easier to read. Although the participants expressed a preference for low LoD diagrams, no statistically significant conclusions can be drawn from the set of experiments. One important finding attained from this family of experiments was that the participants minimized or avoided the use of UML diagrams, regardless of their LoD. This effect was probably the result of using small software systems from well-known domains as experimental materials.

Autores: Ana Maria Fernández-Sáez / Marcela Genero / Danilo Caivano / Michel Chaudron / 
Palabras Clave: Controlled Experiment - Family of experiments - Level of detail - Replication - Software maintenance - UML diagrams