This project is part of a research project of the Organization Department of Corporations of the Polytechnic University of Catalonia (UPC) about assignment of tasks and learning curves, taking into account the effect of the experience on a task in the performance of another. The aim of this work is the design of a tool that allows the assignment of tasks. That is to say, a tool that allows to realize a distribution of certain workers in each of the tasks that require the projects. The functioning of the tool is as follows: The user must enter some data, which are the tasks of the projects, the hours of previous experience that every worker has in the implementation of each task and the hours of dedication that are required of each task for the execution of projects. Based on these data and the assignment of tasks, that the user should realize, the tool will calculate the experience that each worker is acquiring in the execution of each task and his/her performance on the different tasks. Finally, there is realized a calculation of the hours of performance dedicated to every task and the tool shows to the user if the various tasks can be completed or not. To get the performance of each employee in each task has been used a formula that was proposed [2], which takes into account the previous experience that every worker has in that task and the influence that exists between tasks. The tool was designed in three steps. First, there was realized a design which allowed the introduction of very few data, i.e. few workers and few tasks. This first simulation was designed by the intention of determining the characteristics that the tool had to have and its correct functioning. In addition, simply the previous hours of experience that the workers possess was taken into account. Afterwards, to this previous simulation, was added the function in which the influence between the tasks was taken into account. And finally, once verified that its functioning will be the suitable, it was proceeded to the design of the complete tool, which was more extensive concerning data. The project is divided into two parts. A theoretical part that introduces terms required to obtain a minimum knowledge of the topic, and other one that explains step by step the design of the tool and its operation through examples.