Table 1.

Description of design phases.

Design phase	Description
Predesign (including fuzzy front end)	Phase of understanding and defining the problem, often these studies would focus on the unmet need of a certain population.
Early design	In this phase, there is already some understanding of the problem and the aim is to develop a first concrete idea, often these studies would aim to develop or enhance a first idea or prototype.
Post first prototype	In this phase, there is already a first idea for a solution, which will be iterated or enhanced.