Table 1.

Methodologies that summarizes the underlying elements integrated in this paper.

Methodologies	Description	Integrated Elements in This Paper
User-centered design (UCD) (Design thinking, participatory design and co-design, embodied design ergonomics)	It is an iterative design process in which designers focus on the users and their needs in each phase of the design process [31].	-Double Diamond Model. -Design Thinking principles -Convergent and divergent thinking stages. -Iterative process. -Design/evaluation simultaneously -Participatory and Co-design principles. -Stakeholders definition. -Use of prototypes. -Design methods and tools.
Systems engineering	It is a multi-disciplinary and integrative field based on systems principles and concepts that integrates scientific, information and management methods.	-Iterative process. -Design/evaluation simultaneously. -Use of prototypes. -System validation principles. -Multiple-variants charts examples. -Systems development processes.
Industrial Design (Technological Design, IoT Design, Smart and functional Products Design)	It is a projective field composed of several disciplines that synthetizes knowledge, methods and techniques to enable the mass production of a specific product.	-Development phases. -Technical key stages of development. -Use of prototypes -Technical validation principles. -Particularities of wearables and IoT products.
Interaction Design	It is the design of the interaction between users and products. The goal of interaction design is to create products that enable the user to achieve their objective(s) in the best way possible [31].	-Existing Human Computer Interaction methodologies. -User experience validation principles. -Use of prototypes. -Interaction methods and tools -Particularities of wearables and IoT products.