In this research work, the evaluation of the criteria, components or characteristics offered by the three main DBaaS providers in the cloud was carried out: Google Cloud Platform (GCP), Microsoft Azure and Amazon Web Services (AWS), in relation to the offer of Database as a service (DBaaS) for PostgreSQL, in order to determine which is the best DBaaS option for an information system with a database in the cloud; An information system with DBaaS is developed as a case study to support the research, where the use of a methodology based on research and technological development is proposed. The DBaaS criteria, components, or features that were evaluated were availability, security, capacity, quick elasticity, performance, support, and cost. It is concluded that Azure DBaaS for PostgreSQL through a flexible server is the most appropriate DBaaS provider for the case study developed.
The aim of this article is to describe the proposal for an agile methodology focused on user requirements and its implementation in the System of Integral Administration of Human Resources (SAIRH). This methodology consists of a pre-phase of requirements that can be implemented to an agile methodology, in addition to a cycle for change requests that is incorporated into the cycle of the methodology used, the pre-phase consists of 5 stages: collection, analysis, prototyping, negotiation and the initial requirements report. The change request cycle includes 4 stages: change request, analysis, negotiation, adding the change to the requirements report. The implementation is carried out in the SAIRH where the XP methodology with MVC is used and both the pre-phase of requirements and the change request cycle are included, at the end of this work the impact that the use of this methodology has on the development time of the system is analyzed.
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