Four workshops were held with potential users of the product. Two of the groups with Spanish participants, the other two with international participants, where the product was tested: they were given all the materials so that the participants could individually carry out the assembly and interact with it. In parallel, the users were observed in the execution of the test.
In addition, an initial degree of recommendation was given: after the assembly and interaction experience, the participants gave a degree of recommendation according to their experience, taking into account three factors: operation, mechanism and ease of use.