Nowadays, with the recurrent demands of high quality, delivery on time and no extra costs, the task of managing a software project could be extremely complex for any software enterprise. Furthermore, small-sized software enterprises face several problems (e.g., lack of knowledge, human and financial resources, time, and size of staff) that, undoubtedly, make this task more difficult. In this context, obtaining a simplified version of the management activities can be a helpful alternative for these enterprises. In this way, that an inexperienced project manager can define the management process that best fits with a particular project is not an easy task. Thus, this paper introduces the metamodeling approach in order to help project managers to define a process for managing a software project. Therefore, with the aim to validate its feasibility an add-in program was developed as a part of a case study. The achieved results show an important reduction in project's effort and time needed to develop a new software product.Keywords: project management, metamodeling approach, plug-in, small-sized software enterprises. complex and multi-dimensional concept encompassing many more attributes. However, in spite of the advancement in the definition of project management processes, tools, and computer systems, the rate of software projects success has not significantly increased. Moreover, a recent study stated that the value of project management depends on the country, culture, industry type, size of organization, and organizations' needs [3]. In fact, nowadays we still have not figured out how to substantially improve the software project success rate. For example, Cerpa, Bardeen, Astudillo, and Verner [4], have identified some factors influencing software project outcome: organizational structure; communication with customer/users; scheduling and project budget; customer satisfaction; product quality; leadership; software development methodologies; and the project management process and tracking tools, among others. Many of these factors are obviously related to project management. Thus, projects are the cornerstone of all commercial activities in small-sized software enterprises. 1 Therefore, these organizations must conclude many software projects to achieve their business and financial goals using a carefully planned and controlled process. In this regard, the nature of project management required by small-sized software enterprises is very different than the traditional forms suggested for larger enterprises. This is, small-sized software enterprises require less bureaucratic forms of project management than those used by larger, traditional organizations [5]. Unlike large enterprises, small-sized software enterprises do not have enough staff to develop functional specialties that would enable them to perform complex and secondary tasks to improve the software projects management and, as consequence, the products quality. The employees of these enterprises perform multi-tasks, so it is common that software projects a...