– The set of usability criteria – it represents perceived ease of use and perceived usefulness; the primary is outlined because the diploma to which a person considers utilizing a particular system is freed from effort, whereas the latter refers back to the diploma to which one thinks that resorting to a particular system enhances one’s efficiency. With a view to assess the extent of usability the following notions have to be considered: accessibility, compatibility, functionality, consumer’s satisfaction, person interface. All these signify property of the usability precept. Within the subject of e-health providers, these notions are utilized to the …