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El autor Genoveffa Tortora ha publicado 2 artículo(s):

1 - A fine-grained analysis of the support provided by UML class diagrams and ER diagrams during data model maintenance

This paper presents the results of an empirical study aiming at comparing the support provided by ER and UML class diagrams during maintenance of data models. We performed one controlled experiment and two replications that focused on comprehension activities and another controlled experiment on modification activities related to the implementation of given change requests. The results achieved were analyzed at a fine-grained level aiming at comparing the support given by each single building block of the two notations. Such an analysis is used to identify weaknesses (i.e., building blocks not easy to comprehend) in a notation and/or can justify the need of preferring ER or UML for data modeling. The analysis revealed that the UML class diagrams generally provided a better support for both comprehension and modification activities performed on data models as compared to ER diagrams. Nevertheless, the former has some weaknesses related to three building blocks, i.e., multi-value attribute, composite attribute, and weak entity. These findings suggest that an extension of UML class diagrams should be considered to overcome these weaknesses and improve the support provided by UML class diagrams during maintenance of data models.

Autores: Gabriele Bavota / Carmine Gravino / Rocco Oliveto / Andrea De Lucia / Genoveffa Tortora / Marcela Genero / José A. Cruz-Lemus / 
Palabras Clave: Comprehension - ER diagrams - Family of experiments - Meta-analysis - Model maintenance - UML class diagrams

2 - On the Effectiveness of UML Sequence Diagrams in the Comprehension of Functional Requirements

Modeling is a fundamental activity within the requirements engineering process and concerns the construction of abstract descriptions of requirements that are amenable to interpretation and validation. Empirical evidence about which modeling technique helps to improve the comprehension of functional requirements is needed. This paper presents the results of a family of experiments conducted with students and professionals to investigate whether the comprehension of functional requirements is influenced by the use of dynamic models that are represented by means of UML sequence diagrams. The family contains five experiments performed in different locations and with 112 participants of different abilities and levels of experience with UML. The results show that sequence diagrams improve the comprehension of functional requirements in the case of high ability and more experienced participants.

Autores: Silvia Abrahão / Carmine Gravino / Emilio Insfrán / Giuseppe Scanniello / Genoveffa Tortora / 
Palabras Clave: Comprehension - Family of experiments - UML sequence diagrams